Introduction: How to Glue/Adhere/Attach Wood to Plastic (Polyethylene and Polypropylene) With 100% Silicone Caulk

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100% silicone caulk makes an excellent glue/adhesive when attaching wood to plastic like polyethylene/polypropelene. Given that construction adhesives cannot grab onto hard plastics since plastics are non-reactive, 100% silicone caulk is an excellent alternative.


  • 100% Silicone caulk (be sure it is not acrylic)
  • Caulking gun
  • Wood (using cedar wood shims here)
  • Hard plastic like a trash bin
  • Heavy duty cutters or snips

Step 1: Preparation

  1. Use the heavy duty cutters/snips to cut open the silicone caulk spout.
  2. Use the puncture tool on the caulking gun to puncture the inner seal at the bottom of the spout.
  3. Load the silicone caulk into the caulking gun.
  4. Open the cedar wood shims and test place where you want the shims to go on the hard plastic

Step 2: Apply Silicone Caulk and Attach

  1. Using the caulking gun, put silicone caulk onto the wood shim in a rough "S" pattern.
  2. Use a wood paint stirrer or your finger to smooth it out.

Step 3: Place Wood on Plastic

  1. Place wood on plastic
  2. Press firmly into place
  3. Repeat steps with additional pieces of wood
  4. Give the silicone caulk about 24 hours to cure.