Thermo-Trap Gel's unique formula provides a protective barrier from open flames and heat that are present during soldering and brazing. The gel works as a shield that protects the surface from melting or burning. When finished, the remaining gel is easily wiped up and leaves no residue or stain. the gel is not a heat sink, but a protective barrier. Product may need to be added more than once if subjected to open flames for a longer duration. Drywall, wood joists, or other areas are not damaged from the open flames.