Fire-Resistant Insulation and Systems

Rector Seal's cover guards for light switches and electrical outlets are easy to install, whether you are building a new house or retrofitting an old one. Stick the adhesive-backed guards to the back of your electrical boxes and behind your decorative wall plates. Made of condensed foam that expands when exposed to heat, the guards are designed to extinguish sparks caused by faulty wiring, which can start fires. $4.22 per set. Contractors Tool Supply