Cheap liquid silicone rubber to make molds for lost was casting Lost Wax Casting Silicone 1.Description GC RTV silicone C-825 are good for lost wax casting. They are widely used for lost wax process of bronze casting to make accurate reproductions of original sculpture. 2. Technical Datasheet Typical general characteristics Inspection MethodValue Product data (Catalyzed A+B)C-825 HardnessShore A25±2 Mix RatioA:B100:3 Color/White Pot life25 C (77F)30-40mins Curing time25 C (77F)3-4 hours Mixed viscositymPa.s20000±1000 Tear-strengthkg/cm22±2 Tensile-strengthM.pa4.0±0.5 Elongation%450±50 Shrinkage%?¤0.3 Note: This is a 100A:3B mix ratio product that must be measured by weight. The choosing of suitable hardness should be according to the size and pattern design of the products. If large products and therefore multiple-piece molds are needed by customers, silicone rubber with higher hardness will be required for the molds. Conversely, soft silicon is indispensable for molds with complicated pattern and delicate details. The amount of curing agent admixture depends on the actual need of customers. More will be added for speedy drying and fast release and less when otherwise. 3. FEATURES Low viscosity,great flexibility,Extra low shrinkage,Chemical resistance,release properties, Easy to work with,High tear strength,Heat Resistance,various color is available,High reproduction rate 4.Appearance Part A: Silicone rubber is a white liquid Part B: Catalyst is a non-toxic and odorless liquid, white transparent color. ATT: We can provide fast/medium/slow catalyst of for hot, warm or cold season. 5.SHELF LIFE: When stored at or below 32C (89.6F) in the original unopened containers, C-8 series Silicone Base and its Curing Agents have a usable life of I0 months. 6.Package Silicone base:1kg/drum; 20kg/drum;25kg/drum;200kg/drum. Curing Agent: 30g/bottle; 1kg/bottle