Tin Cure Liquid Silicone Rubber LSR for Craft & Architectural Mold Making This tin cure liquid silicone rubber (LSR) is a cost-effective two-component RTV-2 material engineered for craft and architectural mold making. With skin safe non-toxic formulation and fast room temperature cure , it is the first choice for artists, DIY enthusiasts and architectural professionals. Key Features Skin Safe & Non-Toxic - Safer for hobbyists, no risk of contaminants inhibiting cure Fast Room