Transparent, round, hard, and elastic sheets that combine with the self-curing resins DURASPLINT® and DURASPLINT® LC. For the use of DURASPLINT® LC, a pretreatment with LC-Primer is required. Pre-drying is not necessary. Application includes Miniplast splints, occlusal and provisional splints, fluoride trays, radiographic templates, devices for the treatment of obstructive sleep apnea, and reinforcement for anterior teeth for sports mouthguards.