Bostik Blu Tack is multipurpose reusable adhesive. Blu Tack is the original reusable adhesive that provides an ideal alternative to drawing pins and sticky tape with thousands of uses around the home, office and school environment. It is a permanently plastic, reusable multipurpose adhesive and modelling material that is pliable and non-toxic, making it safe for all the family to mould, stick and play. Its formula is a manufacturing secret, but Blu Tack it can be described as a synthetic rubber compound without hazardous properties (under normal conditions). It’s non-carcinogenic, non-soluble and is denser than water. Blu Tack can be used on non-porous surfaces such as glass, metal and plastic, as well as painted surfaces and vinyl coated wallpaper. For best performance, surfaces must be clean and dry and free from grease or loose materials. Blu Tack is a non-toxic, non-harmful substance and will not cause any problems if swallowed, only mild discomfort. If any discomfort experienced continues, we recommend seeking medical advice. If a room or surface conditions are too hot (over 70 Degree C), Blu Tack will soften and become more difficult to secure items in place. Comes in blue/grey colour.