Step 5: Apply polyurethane glue

glue, rotted window, dutchman
Photo: Brian Wilder
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Polyurethane glues cure by reacting with moisture, so first dampen the unpainted surfaces slightly, then spread the glue onto the raw wood on both the patch and the old sill.
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    Tools List

    • folding A-square
      Square
    • utility knife
      Utility knife
    • ryoba saw
      Japanese handsaw
    • chisel
      Chisel
    • sand paper
      100- and 150-grit sandpaper

    Shopping List

    1. CEDAR REPLACEMENT PATCH
    (Note: Cedar is a rot resistant wood)

    2. POLYURETHANE GLUE

    3. STAINLESS STEEL TRIM SCREWS

    4. GLAZING PUTTY

    5. OIL-BASED PRIMER

    6. 100-PERCENT ACRYLIC PAINT