Permatex Ultra Copper RTV Silicone Gasket Maker - 3 Oz
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Product Information
Full details
The Permatex Ultra Copper RTV Silicone Gasket Maker is for DIY mechanics and automotive professionals needing a high-temperature sealant for creating custom gaskets or replacing worn ones. Its key benefit is the ability to withstand extreme heat up to 700°F, ensuring a reliable seal in demanding engine conditions. A potential caveat is its specific formulation for high heat, which might be overkill for lower-temperature applications where a different RTV might suffice. This gasket maker offers excellent adhesion, oil resistance, and durability for a variety of automotive sealing needs.
All features
| Colour | Copper |
|---|---|
| Model Part Number | 81878 |
| Brand | Permatex |
Extended Product Information
FAQs
What is the maximum temperature this gasket maker can withstand?
The Permatex Ultra Copper RTV Silicone Gasket Maker is designed to withstand temperatures up to 700°F (371°C).
Can I use this on my exhaust manifold?
Yes, its high-temperature resistance makes it suitable for sealing exhaust manifold gaskets and other high-heat exhaust components.
How long does it take to cure?
The gasket maker skins over in about 1 hour and cures to a Shore A hardness of 40-50 in 24 hours. However, it is recommended to allow 24 hours for full cure before resuming operation.
Is this product suitable for oil pans?
Yes, it is suitable for oil pans and other engine components that are exposed to engine oil and high temperatures.
Can this be used as a gasket replacement for a cylinder head?
No, this product is not recommended for use on cylinder head gaskets.
What surfaces does this adhere to?
It adheres well to metal, plastic, and painted surfaces.
How should I prepare the surfaces before applying?
Surfaces must be clean, dry, and free of oil, grease, and dirt. Remove all old gasket material and sealant.
Troubleshooting
Sealant not curing properly
Ensure surfaces were clean and dry before application. Verify that the bead thickness is within the recommended range and that there is adequate airflow for curing. If applied too thickly without sufficient air, curing will be slow or incomplete.
Leakage after application
Check that the bead was continuous and sufficiently thick. Ensure parts were properly aligned and torqued to specifications within the recommended time frame. Reapply if necessary after thoroughly cleaning the surfaces.
Difficulty applying a smooth bead
Practice applying to scrap material first. Ensure the nozzle is properly fitted and cut to the desired bead size. Apply steady, even pressure.
Sealant peeling or cracking
This usually indicates poor surface preparation or insufficient cure time. Ensure surfaces are free of oil and contaminants, and allow the RTV to cure fully before use.
Pros and Cons
Pros
- Excellent high-temperature performance up to 700°F.
- Creates durable, flexible, and leak-proof seals.
- Resists oil, coolant, and vibration.
- Good adhesion to various automotive surfaces.
- Versatile for custom gasket creation and replacement.
Cons
- May be excessive for low-temperature applications.
- Requires adequate cure time to reach full strength.
- Can be messy if not applied carefully.
- Specific copper color may not match all aesthetics.
- Not suitable for fuel-immersion applications.
Setup, Compatibility & Care Instructions
Setup:
- Ensure surfaces are clean, dry, and free of oil, grease, and dirt. Use a suitable degreaser.
- Remove old gasket material and sealant completely.
- Puncture the tube seal with the applicator.
- Apply a continuous bead (1/8" to 1/4" thick) to one surface.
- Assemble parts immediately within 5 minutes.
- Torque bolts to the manufacturer's specifications within 1 hour.
Compatibility:
This gasket maker is compatible with most automotive engine components, including metal, plastic, and painted surfaces. It is suitable for use with engines, transmissions, differentials, pumps, and water outlets. Not recommended for use on cylinder head gaskets or parts in contact with gasoline.
Care:
While this is a permanent sealant, ensure proper curing before exposing it to harsh conditions or fluids. Avoid cleaning the sealed area with harsh solvents that could degrade the silicone.