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How to Reseal an RV

Travel Trailer Resealing

Sealing RV seams is important because water damage often happens at the corners where RV walls are joined together. Although RV walls leave the factory with sealant already applied to the seams, over time UV light and weather breaks the sealant down. This creates gaps in the corners which allow moisture to get inside.

IMPORTANT: Never use silicone on the exterior or your RV for these reasons:

  • It does not stick to itself, so when it needs to be repaired, you need to remove all the silicone.
  • It’s extremely difficult to remove!
  • It doesn’t have good adhesion on smooth surfaces and is prone to peeling.
  • Over time it drys to a hard finish and cracks.

Instructions

Step

Look for any seams that are cracked or have gaps.

How to Reseal an RV
Step

Using a heat gun, heat the old sealant till it’s soft and scrap it out with a plastic pick or regular screw driver. If you use a screw driver, be careful not to scratch your paint. You want to remove the majority of old sealant before adding new.

Heat Gun for new RV seals Reseal an RV
Step

Clean area with acetone to make sure all residue and debris are removed.

Prepping for camper reseal
Step

Tape off both sides of the seam that you’ll be resealing. This allows for a clean edge.

Tape for RV Seals
Step

Apply a bead of sealant with a caulk gun. If you’re using Pro Flex® RV or Dicor Non-Sag Lap Sealant, be sure to smooth the bead with your finger in small sections. The caulk skins over pretty quickly.

NOTE: The sealant is very sticky, so you’ll want rags handy or wear gloves.

RV Flex Pro Caulk Seal
Step

Let the sealant dry for 24 hrs and then remove the painters tape.

Travel Trailer Resealing