Hard Evidence™ Pouches are single-use cyanoacrylate pouches. A thin layer of cyanoacrylate is sealed between the two foil halves of each pouch. Simply separate the halves and place near a source of heat and humidity. They can be used inside vehicles, inside tents of plastic material covering furniture, bicycles, bodies or other items too large for a regular chamber. Pouches have a shelf-life of one year, which can be extended if the pouches are refrigerated when not in use.