The Multi Fix Pro Putty is grey in colour & comes in 50g. It is a hand kneadable, speciality putty that can be used to permanently repair many substrates Application For bonding fibreglass, metals, wood, concrete & glass Features Can be used to repair, fill or build up damaged substrates Can be applied underwater 24 hour curing time, can be drilled after 1 hour, sanded after 10 minutes Contents 50 g