How to fix blistering paint
What Is Paint Blistering?
Paint blistering, also called paint bubbling, occurs when paint starts lifting from the surface and forms large bubbles in the finish. The two terms are interchangeable and refer to the same problem.
These imperfections can ruin an otherwise flawless project, but understanding the root causes makes them both fixable and preventable.
What Causes Paint to Blister?
Paint bubbling can occur for several reasons, but the most common culprits are surface contamination, improper cleaning, environmental factors, and incompatible additives.
Surface contamination is a frequent cause — specifically, painting over surfaces that have oil, wax, grease, or silicone on them prevents the paint from bonding properly and leads to lifting.
How to Fix Blistering Paint
The first step in fixing blistered paint is identifying and removing the source of the problem — whether that means cleaning a contaminated surface or addressing moisture before repainting.
Once the cause is resolved, the blistered areas should be scraped or sanded down, the surface properly cleaned and primed, and then repainted. Using a paint calculator at / can help you estimate the right amount of paint needed so you don't over- or under-apply product during the repair.
How to Prevent Paint Blistering
Proper surface preparation is the most effective way to prevent blistering — this includes thorough cleaning to remove any oil, wax, grease, or silicone before applying paint.
Avoiding painting in extreme temperatures or high humidity, and ensuring surfaces are fully dry before painting, also reduces the risk of bubbles forming in the finish.
Key takeaways
- Paint blistering and paint bubbling are the same issue — paint lifting from the surface to form bubbles — and are caused by contamination, improper cleaning, environmental factors, or incompatible additives.
- Fixing blistered paint requires removing the damaged paint, addressing the underlying cause, and repainting over a properly cleaned and primed surface.
Related tools
Estimate materials with our paint calculator on PaintMath.