What is an RTV Sealant?

  • An RTV sealant is a silicone room temperature vulcanizing sealant that starts to cure as soon as it is exposed to air.
  • This type of sealant can withstand extremes in temperature, dries quickly, and remains flexible which makes it a great choice for stopping leaks in glass, metals, vinyl, weather stripping, and electrical wiring.
  • Because of it’s ability to withstand high heat there are types of RTV sealants used in a number of automotive repairs to stop various leaks.

Industrial RTV Sealant

Different Kinds of RTV Sealants

For Extremely High Temperatures

While an ordinary RTV sealant can withstand temperatures ranging between-75 degrees Fahrenheit and 500 degrees Fahrenheit there are certain repairs that call for a sealant that can withstand even higher temperatures than 500 degrees. This is where a special high temperature RTV sealant is used.

High Temperature RTV Sealant

  • High temperature sealants can withstand temperatures up to 650 degrees Fahrenheit and are usually used for industrial rather than home repair.
  • This type of RTV sealant is used for sealing connections in gas Cat III systems, sealing heating elements in appliances, for bag filters in smoke stacks, and aerospace gasketing

RTV Sealants That Withstand Gear Oil Ingredients

Some of the ingredients in gear oil can break down silicone sealants rendering them useless.  In such cases using Permatex gear oil RTV sealant will solve this problem and provide a permanent long term sealant for those differential cases or as a gasket for a drain plug.

Useful Permatex Gear Oil RTV Sealant

  • This gear oil sealant is sensor safe, contains no toxins and does not have a strong chemical odor so it poses no health risk or hazards. There are some features about these sealants that should be noted.
  • First, because a RTV sealant will immediately start drying the moment it is subjected to air, when using these sealants you will need to work rapidly to keep the sealant from drying before you get it properly applied.
  • Second, once applied this sealant does not easily come off, so you will want to be extra careful to apply it only to those places you actually want sealed  other wise you may need to wait until the sealant is completely dry before trying to remove it.

On Removing RTV Sealant

If you do make a mistake and need to know how to remove RTV sealant you may find it difficult to find a method that works for all given situations.  It can be extremely difficult to remove this sealant from areas where there is little room to work.

Learn How to Remove RTV Sealant

  • Scraping: The best method for removing the RTV sealant is by scraping it off.  Doing so by hand using a razor blade or other hand tool can take an excessive amount of time and may not remove the sealant as quickly as you would like.
  • Wire Brush: One of the best ways for removing excess sealant is by attaching either a wire brush or Scotch Brite disc (made for this job) to your drill and sanding the sealant off.
  • Chemicals: There are also some chemicals that when used together will break down the silicone making it easier to remove.

A RTV sealant can help you to stop various kinds of leaks saving you from having to replace parts both around the home and in your auto.  However, you do need to make sure that you choose the right sealant for the job that is at hand.