What is blu tack?

Blu Tack is a type of reusable adhesive material. It is a putty-like substance that is blue or grey in colour. Blu Tack is commonly used to hang posters, pictures, and other lightweight items on walls or other surfaces. It is also used to hold small items in place for crafting or modelling projects. Blu Tack is non-toxic and can be easily removed without damaging surfaces. It can be reused multiple times as long as it is kept clean and free of debris. Blu Tack was invented in the 1970s and is a popular household adhesive solution in many countries.