Should you use RTV with a rubber gasket?

Due to their shape and design, some molded rubber gaskets necessitate the use of RTV as a supplemental sealer. Please note that RTV is not to be used on the entire gasket; the gasket should be installed clean and dry. RTV should only be used on the corners of the gasket and/or stepped casting areas that have a gap.

Do I need to use RTV on thermostat housing?

2 Answers. Since the thermostat in your car has a regular gasket, you can use RTV or not, at your pleasure. I think unless you are trying to cover up for a pitted housing or base that can’t be easily replaced, it’s best to not use RTV or gasket sealer and just use the paper gasket.

Do you need gasket sealer with a rubber gasket?

A general rule, if you are using gasket sealant, you don’t need a lot! Automotive applications commonly use gasket sealant alongside solid gaskets, as they are repairing older parts. Gasket sealant can be used to make cheaper gasket materials more robust, increasing adhesion and chemical/water resistance.

What is the difference between RTV silicone and regular silicone?

The key difference between RTV and silicone is that RTV is a general term for room temperature vulcanizing silicone, whereas silicone is a polymer material having repeating units of siloxane. When considering the chemical structure, RTV silicone has crosslinks while normal silicone may or may not have cross-links.

Will gasket maker stick to rubber?

This gasket sealer from Permatex is slow drying to allow you to assemble your parts. It works well for adhering cork, paper, or rubber gaskets to vertical or horizontal surfaces. It resists grease, gas, and oil.

How long does RTV thermostat take to dry?

TYPICAL CURING PERFORMANCE Permatex® Water Pump & Thermostat RTV Silicone Gasket cures on exposure to moisture in the air. The product dries tack free in one hour and fully cures in 24 hours.

What RTV to use on thermostat?

Permatex Water Pump and Thermostat RTV Silicone Gasket is a non-corrosive, sensor-safe RTV silicone gasket material formulated specifically for water pumps and thermostat housings. This gasket maker has the highest water-glycol resistance available in an RTV silicone.

How long does RTV silicone take to cure?

24 hours
TYPICAL CURING PERFORMANCE Permatex® Hi-Temp RTV Silicone Gasket cures on exposure to moisture in the air. The product dries tack free in one hour and fully cures in 24 hours.

Do you use RTV on thermostat gasket?

Yes, you can use RTV – but you lose the clearance between the cover and the housing you get with a gasket (which can make it difficult to prise the damned thing off and a paper gasket, properly installed, will seal just fine. Furthermore, should you use RTV with a gasket?

Can a thermostat be sealed with an O ring?

The thermostat housing leaks despite best efforts to retighten. It is a nice aluminum piece with an O ring. No other gasket or sealant was used. I am inclined to dispense with the O ring and use a conventional paper gasket with a bit of sealant. Any reason not to? Click to expand… Is that one of the swivel housings? It looks like it.

Can a Permatex RTV seal a thermostat?

A thin smear of Permatex Ultra Grey (RTV) solved the problem for 16k miles. As mentioned o rings are a pretty good seal. A problem I have seen is the groove is just too deep for the o ring, and once the bolts are brought down no amount of tightening will make a difference.

Can You seal a thermostat housing with a gasket?

Most housings and manifolds have a recess machined in to allow for the thermostat stamping and a gasket to complete the seal. I suspect with no thermostat the hot, pressurized coolant decides to leave the premises via the gap, even if walled in with a paper gasket.

Yes, you can use RTV – but you lose the clearance between the cover and the housing you get with a gasket (which can make it difficult to prise the damned thing off and a paper gasket, properly installed, will seal just fine. Furthermore, should you use RTV with a gasket?

Can a RTV gasket be used on a stamped steel pan?

If you’ve got larger gaps – such as sealing a stamped steel oil pan, you should be using an RTV gasket maker. (Fig. 4) Only fill large gaps, larger than 20 thousandths of an inch, with an RTV gasket maker. 7. Waiting for the gasket maker to partially dry before reassembling.

How long does it take for RTV gasket maker to cure?

Typically, RTVs require a minimum of two hours to set up and 24-hours to achieve the full cure that’s needed before adding fluids or returning the vehicle to service. Anaerobic flange sealants and gasket makers need about an hour to cure.