fischer Intumescent Putty Pads FiPP are manufactured from a red, non-setting, silicone based intumescent polymer and tested in accordance with BS EN 1366-3 for up to 2 hour fire rating and 2 hour insulation. Available as internal and external version, the FiPP is also available in different sizes to suit different socket versions. · · · Simple and quick installation. · · Excellent acoustic properties. · · No electrical conductivity. · · Primerless adhesion to most substrates. · · Excellent acoustic properties · · Air permeability