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Amazon.com: Alumilite AlumiRes (RC-3) Urethane Casting Resin Black [16 oz A + 16 oz B(32 ounces) Two-Part Kit] Great for Small, Large, Durable Pieces such as Rock Climbing Holds, Medical Parts, Architecture
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How to Make Polyurethane Resin Climbing Holds & Silicone Molds for a Climbing Wall on a Budget - YouTube
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