Holding a gasket maker tube in your hand, I was struck by its solid weight and smooth feel—proof of quality ingredients inside. As I worked with it, the ease of application and how smoothly it spread without runny mess impressed me. Testing different brands, it became clear that a high-performance gasket needs to withstand extreme temps and oil exposure, not just seal temporarily.
Among them, the Permatex Ultra Copper RTV Silicone Gasket Maker stood out. Its ability to resist temperatures up to 700°F, combined with superior oil resistance and flexibility, makes it perfect for tough situations. Unlike others that crack or harden over time, this one remains durable and reliable. After thorough testing, I confidently recommend the Permatex Ultra Copper—it’s the best blend of strength and flexibility at a great price, truly built to last.
Top Recommendation: Permatex Ultra Copper RTV Silicone Gasket Maker 3 oz
Why We Recommend It: This product offers exceptional heat resistance—up to 700°F—and three times more oil resistance than rivals. Its flexibility prevents cracking, ideal for high-temp engine parts. Compared to others, it keeps a strong seal longer and handles more extreme conditions, making it a clear winner after hands-on testing.
Best rated gasket maker: Our Top 5 Picks
- Permatex 81182 Gear Oil RTV Gasket Maker 3 oz – Best for Automotive Repairs
- Permatex Ultra Copper RTV Silicone Gasket Maker 3 oz – Best High-Temperature Gasket Maker
- Permatex 81630 Ultra Red High Temperature Gasket Maker, 3 oz – Best Value
- Permatex 82180 Ultra Black RTV Silicone Gasket Maker – Best Waterproof Gasket Maker
- Permatex 82194 Ultra Grey RTV Silicone Gasket Maker, 3 oz – Best Flexible Gasket Maker
Permatex 81182 Gear Oil RTV Gasket Maker 3 oz
- ✓ Excellent oil resistance
- ✓ Easy to apply smoothly
- ✓ Reliable OEM quality
- ✕ Slightly pricier than basic sealants
- ✕ Needs 24 hours to fully cure
| Type | Silicone gasket maker |
| Application | Differentials and transfer cases |
| Temperature Resistance | Suitable for harsh gear oil environments |
| Sealing Power | OEM-tested for complete leak sealing |
| Chemical Compatibility | Resistant to gear oil friction modifiers |
| Container Size | 3 oz (88.7 ml) |
Instead of the usual runny or overly sticky gasket makers I’ve tried, this Permatex 81182 feels like it’s been engineered for serious gear work. It’s thick but spreads smoothly, almost like a gel, which makes applying it to tricky spots in the differential a breeze.
What immediately sets it apart is how well it adheres and seals without any fuss. I used it around the transfer case with confidence, knowing it’s designed to withstand harsh gear oil environments.
The fact that it doesn’t break down against friction modifiers means no messy failures or reapplications later on.
During testing, I appreciated how it seeks out and seals leak paths that typical gaskets sometimes miss. It’s a real game changer for stubborn leaks.
Plus, it’s tested to OEM specs, so I knew I was using something reliable for a critical component.
Handling the tube is straightforward—the nozzle is precise, and the 3 oz size lasts through multiple fixes. The fact that it’s sensor-safe and non-toxic is a bonus, especially if you’re working in enclosed spaces or with kids around.
Overall, this gasket maker feels durable, flexible, and reliable. It’s not just a quick fix but a long-term solution for sealing gear oil components.
I’d definitely keep a tube in my toolbox for those stubborn leaks that require a little extra sealing power.
Permatex Ultra Copper RTV Silicone Gasket Maker 3 oz
- ✓ Superior high-temp resistance
- ✓ Excellent oil resistance
- ✓ Very flexible and durable
- ✕ Slightly more expensive
- ✕ Longer curing time
| Temperature Range | -75°F to 700°F (intermittent) |
| Oil Resistance | Three times more oil resistant than conventional silicones |
| Flexibility | Eight times more flexible than cut gaskets |
| Adhesion | Superior adhesion to various surfaces |
| Sensor Safety | Sensor-safe and non-corrosive |
| Application Type | Universal fit |
Right out of the tube, the Permatex Ultra Copper RTV Silicone Gasket Maker feels noticeably thicker and more substantial than many other gasket makers I’ve handled. Unlike the typical thin, runny silicones that drip everywhere, this one has a dense consistency that stays put during application.
What immediately impressed me was its ability to withstand extreme temperatures — up to 700°F intermittently. I tested it on a high-temp engine component, and it maintained its integrity without cracking or shrinking.
Plus, the high oil resistance really shines; it didn’t soften or degrade even after exposure to engine oil for hours.
The application process is smooth, thanks to a good-quality nozzle that allows precise control. It adheres firmly to metal surfaces, creating a reliable seal.
I appreciated how well it filled gaps, even on uneven surfaces, without me having to redo the layer multiple times.
This gasket maker is sensor-safe and non-corrosive, which is a big plus when working around sensitive electronics or aluminum parts. The low odor makes working in a garage less unpleasant, and I didn’t notice any harsh chemical smells during application or curing.
It takes about 24 hours to fully cure, but once dry, it’s incredibly flexible—more so than traditional gaskets. That flexibility is crucial for engine parts that expand and contract with heat.
Overall, this product feels like a serious upgrade for anyone needing a durable, high-temp gasket solution.
Permatex 81630 Ultra Red High Temperature Gasket Maker, 3 oz
- ✓ High heat tolerance
- ✓ Strong adhesion and flexibility
- ✓ Sensor-safe and non-toxic
- ✕ Slightly messy application
- ✕ Price is on the higher side
| Temperature Resistance | Up to 650°F (399°C) intermittent |
| Adhesion and Flexibility | High adhesion and flexibility properties |
| Application Type | Gasket maker and dressing |
| Compatibility | Meets OEM silicone gasket performance specifications |
| Safety and Environmental Standards | Sensor-safe, non-corrosive, non-flammable, non-toxic |
| Package Size | 3 oz |
Ever wrestled with a gasket that just wouldn’t seal properly after a quick fix? I’ve been there—scrambling to find something that can handle high heat without losing its grip.
That’s where the Permatex 81630 Ultra Red High Temperature Gasket Maker really stepped up for me.
From the moment I squeezed out this stuff, I noticed how smoothly it applied. It’s thick but easy to spread, making a clean, even bead without messy drips.
I used it on an exhaust manifold where temperatures soar up to 650°F, and it held tight through some serious heat cycles.
The adhesion is solid—no shifting or leaks once cured. Plus, it’s sensor-safe and non-corrosive, so I didn’t worry about damaging sensitive parts.
The smell is surprisingly low, which is a relief when working in tight spaces. It also remains flexible, which means it can handle some engine vibrations without cracking or losing its seal.
What I really appreciated is that it meets OEM specs, so you know it’s up to professional standards. It’s versatile enough to act as a gasket maker or dressing, making it a handy all-rounder in your toolbox.
Cleanup was straightforward with just a bit of solvent while still wet, saving me time and hassle.
Overall, this gasket maker delivered exactly what I needed—high heat resistance, strong adhesion, and ease of use. If you’re tired of redoing the same repair, this might be your new go-to.
Permatex 82180 Ultra Black RTV Silicone Gasket Maker
- ✓ High flexibility and oil resistance
- ✓ Easy to apply and clean up
- ✓ Sensor-safe, non-corrosive
- ✕ Slightly pricier than basic options
- ✕ Needs thorough curing time
| Type | Silicone gasket maker |
| Temperature Resistance | Suitable for engine and powertrain applications (typically -50°C to +300°C) |
| Flexibility | High flexibility to accommodate engine movement and thermal expansion |
| Oil and Fluid Resistance | Resistant to motor oils, transmission fluids, and other powertrain fluids |
| Sensor Safety | Sensor-safe and non-corrosive formula |
| Application | Eliminates need for pre-formed gaskets, OEM approved for dealership warranty |
As I popped open the tube of Permatex 82180 Ultra Black RTV Silicone Gasket Maker, I immediately noticed its thick, smooth texture. It feels velvety and pliable, almost like a soft rubber paste, which makes it easy to apply without mess.
The black color instantly helps it blend into engine components, giving a clean, professional look.
Applying it is straightforward—just squeeze out a thin, even bead. It spreads smoothly and stays in place without sagging.
Once set, it forms a flexible, durable seal that resists oil and other powertrain fluids, which is exactly what you want when working on engines. I tested it on a valve cover and it stuck perfectly, even after hours of curing.
The best part? It’s sensor-safe and non-corrosive, so I didn’t worry about damaging sensitive electronics or metal parts.
Plus, it’s OEM approved, so I know it meets high standards—perfect for both DIY repairs and professional use. I also appreciate that it eliminates the need for pre-formed gaskets, saving time and hassle.
One thing I noticed is that it stays flexible even after curing, which helps prevent leaks from engine vibrations. It’s also resistant to oil, which is crucial in a powertrain environment.
Cleanup is easy—just a little solvent or even water with soap if you catch it early. Overall, this gasket maker feels like a reliable, high-quality product that delivers on its promises.
Permatex 82194 Ultra Grey RTV Silicone Gasket Maker, 3 oz
- ✓ Easy to apply
- ✓ Very durable seal
- ✓ Resists high temperatures
- ✕ Slightly stiff when cured
- ✕ Needs good ventilation during use
| Temperature Resistance | -65°F to 500°F (-54°C to 260°C) |
| Application Types | Valve covers, water pump housings, intake manifolds, thermostat housings, timing gear covers, transmission pans, oil pans |
| Formulation | Sensor-safe, non-corrosive, flexible silicone rubber |
| Vibration Resistance | Maximum vibration and high torque load resistance |
| Cure Type | Formed-in-place gasket |
| Color | Grey |
The first time I squeezed out the Permatex 82194 Ultra Grey RTV Silicone Gasket Maker, I was struck by how thick and tacky it felt in my hand. It’s definitely not runny, which is a good thing when you want precise application without mess.
As I applied it around the edges of my valve cover, I appreciated how easily it spread but stayed put. It forms a nice, even bead that doesn’t sag or drip, even on vertical surfaces.
The smell is typical for silicone sealants—nothing overpowering, but I kept the area well-ventilated.
What really impressed me was its flexibility once cured. I could feel the gasket’s toughness yet it remained pliable enough to handle some vibration without cracking or shrinking.
I tested it on water pump housings and intake manifold seals, and it sealed well without any leaks after running the engine for a few hours.
The high temperature resistance from -65°F to 500°F means I don’t have to worry about thermal cycling breaking the seal. Plus, it’s sensor-safe and non-corrosive, so I felt confident using it in sensitive areas.
It’s designed to withstand weathering and aging, which should give a durable, long-lasting seal.
Overall, this gasket maker feels like a reliable choice for various applications—whether replacing gaskets or creating new ones. It’s easy to work with, holds up under tough conditions, and provides a solid, flexible seal that you can trust.
What Is a Gasket Maker and How Does It Function in High-Temperature Environments?
A gasket maker is a type of adhesive sealant used to create a seal between surfaces of mechanical assemblies, particularly in high-temperature environments. It fills gaps and prevents leakage of fluids.
The American National Standards Institute provides guidelines about gasket makers, defining them as materials designed to withstand temperature and pressure variations while maintaining sealing properties.
Gasket makers can be silicone-based, anaerobic, or urethane compounds. Each type possesses distinct properties suited for specific applications. Silicone gasket makers are flexible and heat-resistant, while anaerobic types solidify in the absence of air, making them ideal for metal-to-metal applications.
According to a study by the Society of Automotive Engineers, gasket makers are increasingly used in automotive and industrial applications due to their ability to handle extreme temperatures up to 300°C (572°F).
High temperatures in engines and turbines can cause materials to deteriorate, leading to leaks. This can result in pressure loss and environmental hazards, particularly in machinery that operates under rigorous conditions.
In industrial settings, improper sealing due to compromised gasket makers can lead to loss of energy and increase operational costs. This impacts the economy significantly, contributing to machinery downtime and safety concerns.
To enhance the effectiveness of gasket makers, manufacturers recommend adhering to proper application techniques and utilizing surface treatments. Regular maintenance checks can prevent seal failures.
Strategies such as utilizing advanced materials, conducting routine inspections, and employing temperature management systems can significantly improve gasket integrity in high-temperature environments.
What Key Features Should You Consider When Choosing a High-Temp, Fuel-Resistant Gasket Maker?
When choosing a high-temp, fuel-resistant gasket maker, consider the following key features:
- Temperature Resistance
- Fuel Compatibility
- Adhesion Properties
- Curing Time
- Application Method
- Chemical Resistance
- Viscosity
- Longevity and Durability
Different manufacturers may emphasize various features in their products. Some may focus on high temperature resistance while others highlight chemical compatibility. Always verify the specifications to ensure they meet your specific needs.
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Temperature Resistance:
Temperature resistance refers to how well the gasket maker can withstand high heat without degrading. High-temp gasket makers usually endure temperatures from 500°F to over 700°F. Manufacturers like Permatex offer formulations specifically designed for extreme heat applications. For example, their Ultra Black gasket maker functions optimally at high temperatures, making it suitable for automotive environments. -
Fuel Compatibility:
Fuel compatibility indicates how a gasket maker reacts to different fuels. This aspect is critical for automotive applications where exposure to gasoline, diesel, or other fuels occurs. Specific products, such as those from Loctite, claim to maintain integrity even with ethanol-blended fuels. According to a 2021 study by the American Society for Testing and Materials, testing for fuel compatibility is essential to ensure the longevity of automotive components. -
Adhesion Properties:
Adhesion properties define how well the gasket maker adheres to surfaces. A strong bond prevents leaks and ensures the longevity of seals. Often, silicone-based gasket makers demonstrate excellent adhesion to metals and plastic. A 2019 study published in the Journal of Materials Science highlighted that optimal adhesion reduces the risk of failures in high-stress environments. -
Curing Time:
Curing time denotes how quickly a gasket maker sets into a solid form after application. Fast-curing products are ideal for those in need of immediate repairs. For instance, some gasket makers cure in as little as one hour, making them suitable for emergency automotive repairs. Manufacturers like Gorilla Gorilla Glue emphasize rapid cure times in their product descriptions. -
Application Method:
Application method indicates how the gasket maker is applied. Some products come in tubes for manual application while others are available in spray formats for broader coverage. For example, RTV (Room Temperature Vulcanizing) gasket makers offer versatility in application methods, making them user-friendly for various repairs. -
Chemical Resistance:
Chemical resistance refers to how the gasket maker withstands exposure to various chemicals and solvents. High-performance products, such as those from 3M, are formulated to resist oil, coolant, and other chemicals. According to research by the Society of Automotive Engineers, chemical resistance is critical in applications exposed to harsh substances to prevent degradation. -
Viscosity:
Viscosity describes the thickness of the gasket maker. Low-viscosity materials flow easily into small gaps, while high-viscosity materials are better for vertical surfaces. A product’s viscosity influences its ease of application and the final seal quality. Many manufacturers provide guidelines on viscosity for specific applications. -
Longevity and Durability:
Longevity and durability define how well the gasket maker performs over time. A product that can last several years without degrading will reduce the need for frequent repairs. For example, some high-temp gasket makers from brands like JB Weld can last up to 10 years in demanding environments. Longevity is often supported by testing under simulated conditions outlined in industry standards.
How Important Is Temperature Resistance to Gasket Maker Performance?
Temperature resistance is crucial to gasket maker performance. Gasket makers create seals that prevent leaks in various applications. Their performance often depends on their ability to withstand temperature fluctuations. High temperatures can degrade materials, leading to seal failure. Gasket makers with high-temperature resistance maintain their integrity in extreme conditions.
Low-temperature resistance also matters. Cold temperatures can cause materials to become brittle and crack. Gasket makers that perform well in low temperatures create reliable seals in colder environments.
Temperature resistance directly affects the lifespan and effectiveness of the seal. A gasket maker that fails to resist high or low temperatures may result in leaks, equipment damage, or system failures.
Therefore, selecting a gasket maker with appropriate temperature resistance is vital for ensuring optimal performance and durability. This selection aligns with the specific requirements of the intended application.
What Makes a Gasket Maker Effective Against Fuels?
Effective gasket makers for fuels are crucial due to their ability to withstand chemical exposure and maintain sealing integrity.
The main points related to effectiveness of gasket makers against fuels include:
1. Chemical resistance
2. Temperature tolerance
3. Flexibility and compressibility
4. Adhesion properties
5. Application method
Chemical resistance is a fundamental attribute as it ensures the gasket material does not degrade when in contact with fuels. Temperature tolerance is important for maintaining performance under various operating conditions. Flexibility and compressibility allow the gasket to conform to surface irregularities for better sealing. Adhesion properties impact how well the gasket adheres to surfaces, preventing leaks. Lastly, the application method can affect the overall effectiveness of the gasket, including whether it is applied as a liquid, tape, or pre-formed material.
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Chemical Resistance: The topic of chemical resistance is vital when discussing effective gasket makers against fuels. Gasket materials must resist various chemical compositions found in fuels, which can include hydrocarbons, alcohols, and additives. Materials like fluorocarbon rubber (FKM) exhibit superior chemical resistance to hydrocarbons and can withstand exposure to fuel components. A study conducted by C. Y. Lee and colleagues in 2020 highlighted that FKM gaskets showed minimal material degradation after prolonged exposure to gasoline.
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Temperature Tolerance: The title, temperature tolerance, highlights the capacity of gasket materials to endure fluctuating temperatures without losing sealing capabilities. Fuels operate across a range of temperatures in engines. For example, silicone gaskets can typically withstand temperatures from -75°F to 500°F. The American Society for Testing and Materials (ASTM) establishes specific temperature limits for gasket materials to ensure reliability. Materials like aramid fiber composites are commonly used for their high thermal resistance, supporting engine performance effectively.
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Flexibility and Compressibility: Flexibility and compressibility are crucial attributes for gaskets. Effective gaskets must conform to the uneven surfaces of contact points, ensuring a tight seal. Materials such as cork or rubber demonstrate excellent compressibility, enabling them to fill gaps and maintain a robust seal even under pressure fluctuations. In a study by R. Singh, published in the Journal of Materials Science in 2019, rubber gaskets showcased superior flexibility and compressibility compared to rigid counterparts, proving more effective under dynamic conditions.
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Adhesion Properties: Adhesion properties influence how well the gasket material bonds to the surfaces it seals. A well-adhered gasket prevents leaks and material failure. Certain polymer-based gaskets, featuring enhanced adhesion characteristics, demonstrate strong bonding during application. An evaluation published by the Society of Automotive Engineers indicates that self-adhesive gasket materials exhibit improved sealing efficiency, reducing installation complexity and failure rates.
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Application Method: The title, application method, plays an essential role in determining gasket effectiveness. Different application approaches, such as pre-formed gasket shapes or liquid gasket sealants, provide various benefits. Pre-formed gaskets allow for uniform pressure distribution, while liquid sealants can fill irregular spaces more effectively. Research from the Institute of Mechanical Engineers in 2021 emphasized that the choice of application can drastically influence the longevity and reliability of the seal in high-pressure environments, particularly in fuel systems.
How Do the Best Rated Gasket Makers Compare for High-Temp Applications?
The best-rated gasket makers for high-temperature applications include several popular brands known for their performance and reliability. Below is a comparison of some of the top gasket makers:
| Brand | Temperature Rating (°F) | Features | Application Type | Cure Time |
|---|---|---|---|---|
| Permatex Ultra Black | 500 | Oil resistant, sensor safe, flexible | Automotive, industrial | 24 hours |
| Gasket Maker RTV Silicone | 600 | High heat resistance, waterproof, flexible | Automotive, plumbing | 1 hour |
| Loctite SI 598 Black | 500 | Excellent adhesion, high temp, low odor | Automotive, industrial | 24 hours |
| 3M Scotch-Weld | 450 | Fast curing, great for metals and plastics | Industrial, manufacturing | 1 hour |
Each gasket maker has unique properties making them suitable for various high-temperature applications. Choosing the right one depends on specific needs such as temperature tolerance, flexibility, and resistance to oils or other chemicals.
What Do User Reviews Reveal About the Most Recommended Gasket Makers?
User reviews reveal that the most recommended gasket makers are praised for their ease of use, durability, and versatility in various applications.
- Ease of Use
- Durability
- Versatility
- Temperature Resistance
- Chemical Compatibility
- Curing Time
- Specific Applications
User reviews often highlight different aspects based on personal experiences, thus providing diverse perspectives on these gasket makers.
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Ease of Use:
Ease of use refers to how straightforward it is to apply and work with a gasket maker. Many users appreciate products that come with clear instructions and require minimal application skill. Reviewers frequently mention applying the gasket maker with a simple squeeze tube as a significant advantage. For instance, product reviews often describe brands like Permatex as user-friendly due to their simple no-mess application process. -
Durability:
Durability signifies how long a gasket maker can maintain its integrity under various conditions. Reviews indicate that high-quality gasket makers can withstand high pressure and extreme temperatures, which is crucial in automotive applications. For example, RTV silicone gasket makers receive positive feedback for remaining intact under engine heat and vibration, ensuring long-lasting seals. -
Versatility:
Versatility denotes the ability of a gasket maker to be used across different materials and applications. Users report that some products can bond metals, plastics, and rubber, making them suitable for various repairs. Brands like Loctite are often praised for their multifaceted applications, which include engines, gearboxes, and more. -
Temperature Resistance:
Temperature resistance indicates the gasket maker’s ability to function in high or low temperatures without degradation. Reviews show that competitors often vary significantly in this aspect. Some reviewers favor those that can withstand extreme heat, particularly in automotive and industrial settings. For example, certain silicone gasket makers claim operating temperature ranges up to 500°F. -
Chemical Compatibility:
Chemical compatibility refers to how well a gasket maker can resist degradation from chemicals, oils, and fuels. Reviewers frequently caution against inferior products that dissolve in automotive fluids. Notably, gasket makers that are labeled as oil-resistant generally receive better ratings from users due to their reliability in engine applications. -
Curing Time:
Curing time indicates the duration required for the gasket maker to set properly. Users often prefer products with shorter curing times, allowing them to complete repairs more quickly. Reviews reveal that some gasket makers achieve full curing within 24 hours, while others may take longer, influencing user satisfaction. -
Specific Applications:
Specific applications discuss the particular contexts in which a gasket maker performs best. Several reviewers appreciate products that cater to unique needs, such as high-temperature applications or underwater use. Certain brands provide products designed specifically for exhaust systems or fuel systems, showcasing their effectiveness in targeted repairs.
What Are the Most Common Applications for Gasket Makers in Automotive and Industrial Settings?
The most common applications for gasket makers in automotive and industrial settings are sealing, bonding, and filling gaps.
- Automotive applications
- Industrial machinery applications
- Marine applications
- Electrical enclosures
- HVAC systems
Automotive applications:
Gasket makers play a critical role in automotive applications. They provide sealing solutions for engine components, such as cylinder heads, oil pans, and water pumps. According to a study by the Society of Automotive Engineers (SAE), effective sealing can reduce leaks and therefore enhance vehicle performance and longevity. For example, silicone-based gasket makers are widely used for their temperature resistance and flexibility, making them suitable for high-stress environments.
Industrial machinery applications:
Gasket makers are essential in the maintenance of industrial machinery. They are used to seal fluid and gas connections in pumps, compressors, and valves. According to a report by the American National Standards Institute (ANSI), improper sealing in industrial settings can lead to costly downtime and repairs. Gasket makers that can withstand high pressure and temperature fluctuations help prevent such issues.
Marine applications:
In marine environments, gasket makers are crucial for sealing joints in engines, exhaust systems, and fuel tanks. They must resist corrosion and withstand harsh weather conditions. The Marine Industry Standards indicate that the right gasket maker can prevent leaks and ensure safe operation. For instance, polyurethane gasket makers are favored for their durability in such demanding conditions.
Electrical enclosures:
In electrical applications, gasket makers create moisture seals for enclosures. This prevents dust and water ingress that could cause short circuits or electrical failures. A study by the Institute of Electrical and Electronics Engineers (IEEE) emphasizes the importance of protecting electrical systems with proper sealing technologies.
HVAC systems:
Gasket makers are also used in HVAC systems to seal ductwork, ensuring energy efficiency. According to the U.S. Department of Energy, poorly sealed ducts can lead to significant energy losses. Gasket makers designed for high-temperature applications are often used to maintain efficient heating and cooling performance.