Knauf Primers and Sealants have been developed to perfectly complement the high quality Knauf product range in a wide variety of systems. PERMAROCK® Joint Adhesive (PU) Is used to glue PERMAROCK® sheet edges together on walls. The adhesive is applied to the sheet edges prior to fixing adjoining sheets. BindEx High Absorption Primer A ready-to-use synthetic emulsion for priming PERMAROCK® Cement Board Indoor. BindEx Waterproof Membrane A liquid applied to waterproof membrane comprising synthetic latex and mineral fillers. Bindex Fire and Acoustic Sealant An acrylic based sealant designed to stop sound, smoke and fire from passing through gaps in fire rated walls and ceilings. It has been fire tested in Australia for control joints, perimeter seals and penetration seals around cables and metal pipes.