This is a simple, 1:1 mix Silicone Mold Making RTV designed for beginers to mold making. It is ideal for most mold making applications and cures in less than two hours. Great for first time mold makers. Use petroleum jelly to separate silicone when using with glass and other silicones for the best results. **Do NOT expose AM 125 to any fluctuating temperatures; AM 125 works best when kept at a constant 73 degrees F. Re-cap the containers immediately after pouring. Store AM 125 at 72F/room temperature. AM125 has a 60 day shelf life once you open the containers.** Widely used for making soap and candle molds. NOTE: THIS PRODUCT IS NOT ELIGIBLE FOR AMAZON FREE SHIPPING.