Docooler Glow in the Dark Tape Premium Luminous Green Sheet Sticker Film for Warning Labels 3"*8" &iexcl;&shy; Coated with a permanent acrylic pressure-sensitive adhesive and backed with a 5 mil poly coated paper liner. The luminescent system used is none-radioactive & non-toxic. Tape will glow in total darkness after exposure to artificial or natural dark light Can be used for identification of critical equipment controls, exit and directional signage.