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DIY molds

  1. construction materials

    Making Cheap Silicone Molds From Caulk: The Practical Shop Method and Its Limits

    You can make cheap castable or kneadable silicone from 100% silicone caulk and cornstarch, but it belongs in the shop, not in code-critical construction…
  2. construction materials

    How to Make Pourable Silicone from Caulk Without Confusing It for Construction Sealant

    A practical contractor’s guide to making pourable silicone from 100% caulk, including ratios, costs, cure limits, safety rules, and when to use commercial RTV…