Use an iron or ironing machine. Waterproof fabrics are often used in jackets, ski suits, tents, backpacks and other clothes or outdoor sports equipment that need waterproof function. They are widely used, and hot melt adhesive films are often needed for seamless bonding of fabrics. You can use an iron or ironing machine to melt the bonding surface and stick it to achieve the effect of "water tightness". Waterproof fabrics are mostly Oxford cloth, nylon cloth, polyester cloth, down jacket waterproof interlining and so on.