How to Make Homemade Window Glass Putty

Published: May 6, 2011
Updated: Nov 20, 2021
1 minute read

You can purchase one of the simplest putties available for both residential and commercial window use at most hardware and home improvement stores, or you can make your own glass putty.

Things You Will Need

  • Rubber gloves
  • Measuring cup
  • Raw linseed oil
  • Boiled linseed oil
  • Calcium carbonate powder
  • Empty paint can or bucket
  • Stirrer
  • Powdered stove black
  • Putty knife
  1. Put on rubber gloves and combine 1/2 cup raw linseed oil with 1/2 cup boiled linseed oil in an empty paint can or bucket.

  2. Stir the combination of raw and boiled linseed oil thoroughly until well mixed. Add calcium carbonate powder to the mixture in 1-cup increments to make the putty light beige in color. Add more cups of calcium carbonate powder to the mixture to make it lighter.

  3. Test for the right consistency by pulling the stirrer out of the can or bucket. If the putty is pancake batter–like, it is the right consistency.

  4. Apply the putty to the window with a putty knife before it dries to strengthen or seal your window.

The Drip Cap

  • Window glass putty is used in a variety of window pane and frame applications.
  • Put on rubber gloves and combine 1/2 cup raw linseed oil with 1/2 cup boiled linseed oil in an empty paint can or bucket.
  • Apply the putty to the window with a putty knife before it dries to strengthen or seal your window.
Owen E. Richason IV

Owen Richason grew up working in his family's small contracting business. He later became an outplacement consultant, then a retail business consultant. Richason is a former personal finance and business writer for "Tampa Bay Business and…

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