The Montana UV-EFFECT Spray is a transparent effect paint that glows under ultra violet lighting. The UV -EFFECT is a colorless, semi-gloss paint that is not visible in sunlight and can be applied on many substrates. Ideal for indoor use on clean and dry surfaces such as artworks, signages, stencils and walls. The UV Effect works great for hidden effects! Turn can upside down and remove nozzle allowing safety ring to fall out.