What is liquid rubber made from?
James Olson
Updated on April 22, 2026
Liquid rubber comes in a variety of compounds, based on silicone or polyurethane. Each compound creates a liquid of a specific viscosity for pouring or brushing over a surface, and each has a specific tear strength for toughness with harder casting materials.
Is Liquid Rubber real rubber?
Made From Real RubberMany products Flex Seal and even Liquid Rubber are not actually made from rubber. Instead they are synthetic chemical blends are either a modified asphalt, acrylic, or a polyurethane.
How do you make homemade Liquid Rubber?
- Mix equal parts of cornstarch and silicone caulk in a bowl. ...
- Add a few drops of oil-based paint to the silicone and cornstarch mixture. ...
- Stir the mixture for another minute or two until it turns into a putty-like consistency.