BLISTERING
Blistering is generally caused by pressure of gases or liquids trapped under paint film. If the paint film does not allow these substances to pass though and remain trapped under the paint layer, the gas or liquid bubbles apply pressure on the paint film and generate blisters. This pressure may be developed by vapor or moisture. The vapor may come from various solvents in the paint film. Moisture can come from various sources such as structural defects, spillage of other liquids or material, precipitations, adjoining surface (Eg. leaky bathrooms) and high humidity conditions etc. The high quality Lionlac and Tokyolac 100% acrylic house paints allow moisture vapor to pass through the film and thus do not produce blisters.
Unseasoned wet wood will cause blistering. Entrapped vapor or solvent may cause blistering when painting is done in direct sunlight. The paint sets in a short time under the direct sun. Formation of blisters cause by the surface vapor trapped underneath the paint film. Dark colors are subjected to this condition frequently.
The humidity or moisture vapor inside the room generally escapes through open windows, doors or ventilators. If it does not happen, the trapped moisture between the wall and the paint film tries to penetrate through the wall and other open spaces of the cold wall structure during nights. This process generates water and accumulates pressure under the paint and causes blisters. This issue can be eliminated by promoting ventilations and adequate air circulation to the newly painted rooms.
All exterior wall structural defects such as cracks and damages should be repaired prior to painting. Leaks in roofs, gutters or spouting can also promote blisters on walls. Openings around window and doors frames, surroundings of siding windows should be caulked or puttied to prevent moisture accumulations. Careful measures should be taken to prevent entering rain water under the paint film.
Back
Unseasoned wet wood will cause blistering. Entrapped vapor or solvent may cause blistering when painting is done in direct sunlight. The paint sets in a short time under the direct sun. Formation of blisters cause by the surface vapor trapped underneath the paint film. Dark colors are subjected to this condition frequently.
The humidity or moisture vapor inside the room generally escapes through open windows, doors or ventilators. If it does not happen, the trapped moisture between the wall and the paint film tries to penetrate through the wall and other open spaces of the cold wall structure during nights. This process generates water and accumulates pressure under the paint and causes blisters. This issue can be eliminated by promoting ventilations and adequate air circulation to the newly painted rooms.
All exterior wall structural defects such as cracks and damages should be repaired prior to painting. Leaks in roofs, gutters or spouting can also promote blisters on walls. Openings around window and doors frames, surroundings of siding windows should be caulked or puttied to prevent moisture accumulations. Careful measures should be taken to prevent entering rain water under the paint film.
Back