Do putty pads expand?
Posted: Wed Oct 20, 2021 9:13 pm
Do putty pads expand? Intumescent Putty Pads are manufactured from a red non-setting, flexible silicone based intumescent polymer. ... Under fire conditions the intumescent pad expands to fill the void left by the burnt out electrical soc 
ket box, preventing the spread of fire through the plasterboard wall.
ket box, preventing the spread of fire through the plasterboard wall.