What is blue-tack?

Blue-tack is a type of reusable putty-like adhesive that is commonly used for hanging posters, pictures, and other lightweight items on walls without causing any damage to the surface. It is made from a blend of synthetic polymers, oils, tackifiers, and fillers. The adhesive properties depend on the temperature, pressure, and duration of application. Blue-tack can be easily removed and reused several times, making it an environmentally friendly and economical alternative to traditional tapes and pins. However, it is not suitable for use on delicate surfaces such as wallpaper, painted walls, or antique surfaces, as it can leave a residue or damage the finish.