www.smooth-on.com for more information about Smooth-On silicone rubbers. Making a Brush-On Mold with Rebound 25 Liquid Silicone Rubber (Part 1 of 2) For this demonstration we are going to use a small plastic model. Step One: Secure Model to Baseboard Hot-melt glue is used to secure model to baseboard. Step Two: Measure and Mix Rebound 25 Silicone Rubber Measure equal amounts of Part A and Part B. Combine Parts A and B into a mixing container. Parts A and B are mixed thorougly for at least 3 minutes. No color streaks indicates liquid rubber material is well mixed. Step Three: Apply First Layer “Detail Coat” A thin first layer ensures minimal bubble entrapment in the finished mold. Use brush to work rubber into fine detail. Do not over-apply rubber. Create rubber flange: cover baseboard at least 3 inches (7.6 cm) out from the base of model. Ensure thorough coverage: check model carefully for missed areas. Mix and apply more rubber if necessary. Let the first coat cure for a about 60 minutes at room temperature until tacky. Tacky = Sticky to the touch by does not come off onto glove. Mold Maker’s Tip Touch rubber off model. If rubber comes off onto your glove, it is not ready for the next layer. Rubber is tacky and ready to receive next layer of rubber. Step Four: More material is measured and mixed for the second, thicker coat Dispense equal amounts of Parts A and B. Mix thoroughly for 3 minutes. No color streaks indicates material is well mixed. Step 5: Apply Second Layer …