Paint Blister

Paint Blister

Occurrence of blisters within the film of the applied paint.
 
CAUSES: Repainting over a poor-quality paint, in which the moisture from the new paint seeps into the old paint and can cause air bubbles or blisters. The formation of air bubbles or blisters may occur when the permeability to the water vapour of the coating is low and there is excess water inside the wall. It is a phenomenon that occurs with some frequency in elastic membrane type paints.
 
TREATMENT: Sand the entire surface until the previous paint is removed, then apply a suitable primer and give the final finish. Only sand the affected areas, properly eliminate the dust, then apply a sealant and the paint finish. Eliminate existing moisture and infiltration by repairing the source of this problem. Allow it to dry, sand, remove dust, apply a suitable primer and give the final paint finish.