HB5 is a High Grab, powerful adhesive which doubles up as a durable, waterproof sealant. Used to bond many building materials including uPVC, timber based materials, masonry, metals, many plastics, damp substrates, etc Used extensively in caravan and motorhome repair, fixing signs, skirting boards, all types of flooring, ceramic tiles, and for bonding Hygienic cladding / splashbacks to most substrates. This has to be the most versatile adhesive on the market today. 300ml cartridges.