You have identified the joint and confirmed that RTV is permitted. The next step is choosing a formulation that suits the operating conditions.
Versachem Mega Grey is designed for rigid, high-vibration assemblies. High Temp Red is formulated for suitable high-temperature sealing applications. Check the exact product specification rather than choosing by colour alone.
When is Mega Grey an option?
Listed applications include valve covers, water pumps, thermostat housings and intake manifold end seals. Mega Grey is non-corrosive to steel, iron and aluminium. Review its suitability against the equipment instructions and service conditions.
Explore Versachem Mega Grey Silicone 99939.
When is High Temp Red an option?
Versachem describes High Temp Red as a moisture-curing gasketing material with temperature resistance up to 650°F (343°C). Confirm the applicable rating, joint design, fluid compatibility and limitations for your exact part number.
Explore Versachem High Temp Red RTV Silicone.
Allow time for the seal to cure
Published instructions for Mega Grey and High Temp Red specify 24 hours before adding fluids or returning the assembly to service. Build the required waiting period into the repair schedule. A dry surface does not establish that the whole bead has cured.
Can I use these products for head gaskets?
Mega Grey and High Temp Red are not recommended for cylinder head gaskets.
Are they suitable for direct gasoline contact?
Both products carry exclusions for components in direct contact with gasoline.
Which is best for my engine?
Start with the exact component and manufacturer’s requirements. The engine model alone may not identify the correct sealing product.
Planning a workshop purchase?
Send White House General Trading the application, part number, pack size and quantity. Explore our Versachem gasket makers and sealants or request a quotation.