Do putty pads expand?

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Do putty pads expand?

Post by charlottmia19 »

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 :cen: ket box, preventing the spread of fire through the plasterboard wall.