Silicone foam

Foam fixer pump used to draw silicone foam individual components, then mix them at the nozzle and dispense into desired location.
Silicone foam having been dispensed into hole in a wall, above a door.

Silicone foam is a synthetic rubber product used in gasketing, sheets and firestops. It is available in solid, cured form as well as in individual liquid components for field installations.[1]

  1. ^ Cox, J.E. (1989). "Silicone foam and method for making it". U.S. Patent and Trademark Office. Retrieved 13 December 2023.