Amazing Mold Rubber is an easy to use tin-based silicone mold-making material that cures quickly and picks up intricate details. Great for one piece molds with undercuts Works for complex multiple-piece molds A two-part liquid rubber used to make extremely elastic molds to produce quick and exact reproductions of an original. Replicas can be cast in Amazing Casting Resin or Amazing Clear Cast. Strong, soft, and flexible; great for undercut parts. Net wt: 349.3 g (.77 lbs.). Work time: 20 minutes. Cure time: 2-4 hours.