Can You Use a Torch to Get Bubbles Out of Polyurethane?
The bubbles arise because of the reaction between the polyol and isocyanate. The result of this reaction is a viscous liquid that becomes solid as it cools. Woodworkers use this material to protect the wood from scrapes, cracks, water, and humidity. The bubbles appear because the reactants are flammable, and the mixture is exothermic. So, … Read more