Bostic Blue tack is a handy putty-like reusable adhesive. Use it to stick, seal, conceal, hold, and position a variety of items. Perfect for sticky jobs around the home, office, at school and for hobby and craftwork. Bostic Blue tack is a great modelling material. Use it to mould, sculpt, and stick. Blue tack is ideal for non-porous surfaces such as glass or metal, painted surfaces and vinyl-coated wallpaper. Ensure surface is clean, dry, free from grease and lose materials. Make sure hands are clean before handling Blue tack.