Emilie Meyer
RTV is a gasket material used in OEM assembly out of the factory. It is specified by major car manufacturers such as GM, Ford, Chrysler, and Mercedes-Benz. RTV is oil-resistant and designed to not break down. It is also used as a sealant for transmission pans. However, there is some debate over whether red or black RTV is better suited for this purpose. Some sources claim that red RTV can turn to jelly when in contact with ATF, while others have used red RTV without any issues. It is important to follow the manufacturer's instructions and ensure that the surfaces are clean before applying RTV.
| Characteristics | Values |
|---|---|
| Temperature range | -75°F to 450°F (-59°C to 232°C) continuous, 500°F (260°C) intermittent |
| Resistance | Resists ATF, coolant, oil and other shop fluids |
| Protection | Protects against leaks caused by vibration and thermal expansion |
| Safety | Sensor-safe |
| Suggested Applications | Automotive and marine gaskets, valve covers, gearbox covers, pumps, compressors, oil pans, thermostat housings, water pumps |
| Cure time | Initial tack-free cure time is anywhere from 30 minutes to 2 hours, depending on the manufacturer. Fully cured within 24 to 72 hours |
| Colour | Black RTV is suggested over red RTV as ATF can turn the red stuff to jelly |
| Other colours | Grey, reddish |
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What You'll Learn
RTV sealant can be used to prevent transmission fluid leaks
When using RTV sealant, it is important to follow the manufacturer's instructions. Some products recommend applying the RTV, installing the parts, and then tightening the bolts. Others suggest allowing the RTV to skin over for 15 minutes to an hour before installing the pan and tightening the bolts. It is also important to ensure that the surfaces are clean and that the RTV is applied evenly.
Some people have reported issues with using RTV sealant on transmission pans. In some cases, the RTV may not cure properly, leading to leaks. Others have found that the RTV can be difficult to work with, especially when trying to hold the pan and start the bolts without messing up the bead of RTV. It is also important to note that not all RTV sealants are created equal; some colours may be better suited for transmission pans than others. For example, some sources suggest using black RTV, while others recommend against using red RTV as it may turn to jelly when it comes into contact with ATF.
Ultimately, the decision to use RTV sealant or a gasket on a transmission pan depends on personal preference and the specific application. Some people prefer the ease and convenience of RTV sealant, while others find that a gasket provides a more reliable seal. It is always a good idea to consult a professional or a mechanic if you are unsure about the best course of action for your vehicle.
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Some sources recommend black RTV over red RTV
RTV or Room Temperature Vulcanization sealants are used as gasket materials for OEM assembly out of the factory. They are used to prevent leaks caused by vibration and thermal expansion. RTV is oil-resistant and is designed to not break down.
However, red RTV has its own advantages. It has high-temperature resistance and can be used in high-temperature situations. It is also resistant to auto and shop fluids and vibration.
Some users have also shared their experiences with using black RTV. One user shared that they bought some fresh black RTV, cleaned everything, applied the RTV to the pan, and let it skin over for 15 minutes before applying the pan. They tightened the bolts and let it cure for 2 hours. Another user shared that they use Right Stuff black RTV for everything except turbo gaskets and thread locking.
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RTV is used as a gasket material for OEM assembly
RTV, or room-temperature vulcanizing, is a versatile silicone-based material used to create a flexible, durable gasket that can withstand a wide range of temperatures and pressures. It is commonly used in automotive applications to seal engine components such as valve covers, oil pans, and water pumps. RTV is specified for OEM assembly by major car manufacturers such as GM, Ford, Chrysler, and Mercedes-Benz due to its ability to resist fluids such as ATF, coolant, and oil.
RTV is an effective sealant because it is water-repellent, adhesive, and holds its shape. It is also resistant to weathering and chemicals, making it suitable for electrical insulation. When used as a gasket material, RTV is applied in a continuous and even bead to the mating surface, ensuring complete coverage, especially around corners and edges. It is important to assemble the parts immediately while the RTV is still wet to ensure proper adhesion and sealing.
In terms of curing time, RTV typically takes 24 hours to fully cure and provide maximum sealing effectiveness. However, it is important to follow the manufacturer's instructions as curing times can vary. RTV is designed to resist breakdown, and its oil-resistant properties make it suitable for use in automotive applications.
While RTV is a popular choice for gasket material, it should not be used as a replacement for the clean and dry installation method recommended for traditional gaskets. Instead, RTV is ideal for sealing corners and stepped casting areas with gaps that may compromise a leak-free assembly. It is important to use RTV sparingly and follow the manufacturer's instructions to avoid excess material that can cause issues.
In summary, RTV is a reliable and versatile gasket material used in OEM assembly, offering excellent sealing capabilities, resistance to fluids and temperatures, and the ability to withstand chemical and mechanical stress.
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RTV can be used in conjunction with a gasket
RTV is a versatile silicone-based material used to create a flexible, durable gasket that can withstand a wide range of temperatures and pressures. It is often used in automotive applications, such as sealing engine components like valve covers, oil pans, and water pumps. RTV is also specified for use by major automotive manufacturers like GM, Ford, Chrysler, and Mercedes-Benz.
To use RTV with a gasket, first prepare the mating surfaces by cleaning them thoroughly with a surface cleaner or degreaser to remove any oil, dirt, or residue. You can use a gasket scraper or razor blade to ensure a smooth and clean surface. Then, apply a thin layer of RTV to one of the mating surfaces, spreading it evenly with your finger. Place the gasket onto the mating surface with RTV, allowing it to tack up and almost dry. After that, apply another thin layer of RTV to the other side of the gasket and spread it evenly. Finally, assemble the parts, hand-tightening them first, and then torque to the manufacturer's specifications.
It is important to note that RTV should only be used in small amounts as a supplement to a gasket, and not as a replacement for the recommended clean and dry installation method. Overusing RTV can lead to excess material that may cause leaks or clog internal engine components. Additionally, always refer to the manufacturer's instructions for curing times and follow any specific recommendations or warnings for the application.
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Some manufacturers state RTV will cure within 24 to 72 hours
RTV, or Room-Temperature Vulcanizing silicone, is a type of silicone rubber that sets and hardens at room temperature. It is commonly used as a gasket material in automotive applications, including transmission pans.
When using RTV, it is important to consider the cure time, which is the time it takes for the RTV to fully harden and cure. Some manufacturers state that RTV will cure within 24 to 72 hours, depending on the product and environmental conditions. For example, the cure time for Permatex Clear RTV Silicone Adhesive Sealant is 24 hours, while other sources mention a cure time of 1 hour for some RTV products.
It is important to follow the manufacturer's instructions for the specific RTV product being used. Some products may require an initial skinning or tack-free time before installation, while others can be applied and torqued immediately. Environmental factors such as temperature and humidity can also affect the cure time, with higher temperatures and lower humidity levels typically accelerating the curing process.
In the case of transmission pans, it is crucial to ensure that the RTV is fully cured before adding fluids or subjecting it to stress. This can help prevent leaks and ensure the proper adhesion and durability of the RTV. In some cases, it may be recommended to wait longer than the minimum cure time specified by the manufacturer to ensure optimal results.
When using red RTV on a transmission pan, it is important to consider the compatibility with the fluids in the system. Some sources mention that ATF (automatic transmission fluid) can turn red RTV into jelly, so it is recommended to refer to the manufacturer's literature or technical data sheets to ensure compatibility with specific automotive fluids.
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Frequently asked questions
Yes, but it is not recommended as it may turn to jelly. It is better to use black RTV.
RTV is used as a gasket material for OEM assembly out of the factory. It is specified by GM, Ford, Chrysler, and Mercedes-Benz.
The initial tack-free cure time is between 30 minutes to 2 hours, depending on the manufacturer. It usually takes 24 to 72 hours to fully cure to design strengths.
RTV is oil-resistant and is designed to not break down. It also provides protection against leaks caused by vibration and thermal expansion.
Alternatives to RTV include using a gasket, such as a cork gasket, or a sealant like FIPG.
