Blu Tack

Blu Tack is a reusable putty-like pressure-sensitive adhesive produced by Bostik, commonly used to attach lightweight objects (such as posters or sheets of paper) to walls, doors or other dry surfaces.

[2] While the inventor of the commercial Bostik product is unknown,[3] a precursor was created around 1970 as an accidental by-product of an attempt to develop a sealant based on chalk powder, rubber and oil.

It is known as "Patafix" in France, Italy, Portugal, Austria and Turkey, kennaratyggjó in Iceland and lærertyggis in Norway (both meaning "teacher's chewing gum"), häftmassa ("attachment paste") or kludd in Sweden, and wondergom in South Africa (an Afrikaans word, literally translated as "wonder glue").

[9] This was such a widespread problem that Sinclair Research's technical support department officially recommended the use of Blu Tack to resolve this issue.

[10] In 2007 the artist Elizabeth Thompson created a 200 kg (440 lb) sculpture of a house spider using Blu Tack over a wire frame.