Preventing Bubbles In Urethane Floor Vinish

Some brands of finish are known to bubble more than other brands.

Preventing bubbles in urethane floor vinish.

Stir the contents instead with a paint stick in a gentle swirling motion. By the way water. Very smooth surface preparation. Brush out bubbles in a fresh polyurethane finish.

I had tried every option i could think of. The most common causes for bubbles are shaking the can and improper brush prep you don t stick a brush into the finish without first soaking the bristles in mineral spirits for oil based polys or in water for water based polys. I had similar problems with very fine bubbles in topcoat. The only remedy is to sand out the bubbles and apply another coat of finish more.

Stir the can prior to use and take your time. When the finish hardens you have to sand them out and apply a new finish. To prevent air bubbles from occurring at all follow these tips. The stain may feel dry on the surface but still be wet below the surface causing the finish to bubble.

Sanding between coats with very fine grit paper 220 and finer. Resist the temptation to shake the polyurethane prior to use. However if you re not careful small air bubbles can mar the beauty of the finish permanently. Applying polyurethane and most other finishes in heavy coats creates bubbles puddles and runs and becomes a defect in and of itself.

Nobody wants to do all the work of refinishing and end up with bubbles in the finish. Finish brushes delicately lay on a thin clear coat to accentuate the surface below. Diluting the poly. Heavy coats of paint levels as it dries flattens out to hide brush marks and minor defects.

Stain that has not dried before the first coat of finish can cause bubbles.