Crack-proof glue can be used to bond glass, pottery, marble, bakelite, plastic, bamboo, wool, cement, textiles and cloth. It also can be fixed autos, machinery, water and oil tanks, the crevices of the chemical pipes, water pipe, water tap, etc. It can be applied to seal gas lighters, TV, sorts of wire coils of meters and apparatus, serving as the insulation layer. Mixed with required color powder, after thinning, it can be sprayed on the wooden floor board, furniture, doors and windows, cement surface, autos and ships to preserve and extend life.