RTV (room temperature vulcanizing) cement is a silicone-based adhesive and sealant used in many automotive and mechanical applications. While it provides a strong, watertight and flexible seal, it can be difficult to remove when needed. Fortunately, there are several solvents that can break down and dissolve RTV cement.
Put on gloves and then pour a small amount of solvent over the RTV cement, just enough to saturate the area covered by the cement.
Allow the solvent to dissolve the cement, reapplying solvent as it runs off or as the dissolving process slows.
Scrape the remaining cement away using a stiff scraper or straight razor.
Wipe away any cement residue using a lint-free cloth soaked in solvent.