Black Tack is like a industrial version of blue tac but a lot stickier and black. Perfect for holding black paper/card on windows without being seen.
It's designed to be removable and reusable. It should remove with no mark from smooth hard surface like windows but we suggest keeping it away from walls and woodwork and soft furnishings as it may leave some residue .
It will get stickier if you warm it up a little by working it between your fingers.
Strip is approximately 19mm wide by 10 cm long.