Formlabs 3D Printer Engineering Resin. Recommended shelf life: 2 years. This resin has a hardness of 80A on the durometer scale and offers excellent impact and compression resistance. It's one of the materials that can be used when you want an ergonomic, soft touch. Specifications: Capacity: 1L. Fire Service Law: Class 4, Flammable Liquid (Petroleum, Alcohol) Third Petroleum Category (Non-water-soluble liquid)