The X-CLARITY™ Hydrogel Solution Kit is a pre-tested hydrogel solution for uniform and consistent tissue-hydrogel hybridization. X-CLARITY™ Hydrogel Solution is an acrylamide-based solution used to create polyacrylamide, a chemically inert and electrically neutral gel matrix. The X-CLARITY™ Hydrogel Solution contains no bis acrylamide or paraformaldehyde. X-CLARITY™ Polymerization Initiator is a thermal free radical initiator also known as VA-044. VA- 044 is relatively stable at room temperature but undergoes rapid hemolytic decomposition when heated in aqueous solution, releasing cationic free radicals that initiate the polymerization of hydrogel monomers.