Cured Polysulfide Sealant Removal

Two Component Polysulfide Sealant

Polysulfide Sealant is often used in aerospace applications, acting as an adhesive and a sealant for panels on airplanes. This caulking is designed to be difficult to remove, but if it is stuck to something you don’t want or you need to separate some of the panels, you need to remove the caulking. This is more difficult when the caulk has cured, because it’s harder to scrape. The fix is to use an emulsifier/stripping agent specifically made for polysulfide sealant removal.

Instructions

1 Locate the affected area. Apply the emulsifier/stripping agent to the surface right out of the container.
2 Scrape the Polysulfide Sealant off the surface. Work all of the seams to make sure all of the caulking is gone.
3 Look for signs of Polysulfide Sealant that didn’t dissolve or isn’t accessible. Reapply the emulsifier/stripping agent and let it sit for five to 10 minutes. Scrape off again.

Tips & Warnings

If you have to apply the emulsifier/stripping agent to a vertical surface, look for one that comes in paste form. You can brush it onto the surface with a paintbrush.
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