Apply to porous models when making polyurethane and silicone rubber molds. Multiple coats may be required depending on the porosity of the model. Allow the solvent to fully evaporate before applying liquid rubber. For Casting: Can be applied to silicone rubber molds when casting liquid silicone. Allow the solvent to fully evaporate before casting. Use of a soft brush to evenly distribute this product or dispense with a Sure Shot Atomizer. NOTES: Shake or stir before use.