BI PACK MULTI-USE POLYURETHANE FILLING FOAM FOR AXTON PISTOL 750MLE' is ideal for insulating against temperature variations and noise on all types of surfaces: jambs, windows, walls, etc., both indoors and outdoors. It can be used to seal cavities (cracks, holes around pipes, cutouts, etc.) and fix components (sockets, switches, etc.)Due to its formula, it can be applied to most building materials: concrete, wood, concrete, PVC...except PE (polyethylene), PP (polypropylene), PTFE (polytetrafluoroethylene).