Yellow Warning Anti-Vandal paint sign on a playground gate , Grappenhall Warrington Cheshire England UK

Anti-climb paint (also known as non-drying paint, anti-intruder paint, anti-vandal paint, anti-vandal grease) is a class of paint consisting of a thick oily coating that is applied with a stiff brush, trowel or by hand using a protective glove. In appearance it is similar to smooth gloss paint when applied but it remains slippery indefinitely thereby preventing any intruder from gaining a foothold.