Few issues are more frustrating for applicators than discovering bubbles or blisters after a coating has cured. These defects not only compromise the surface appearance but can also weaken the coating’s long-term performance. Fortunately, preventing them is simple when you understand their causes and follow a few key best practices. Most bubbling and blistering occur when moisture, solvents, or air become trapped beneath the coating film during application or curing. To avoid this, always begin with a properly cleaned and completely dry surface. Any residue of oil, dust, or water can interfere with adhesion and cause trapped air pockets. Be sure to check substrate moisture—especially on concrete or stucco—and apply INSECO coatings only within the manufacturer’s recommended temperature and humidity ranges. High heat or direct sunlight can accelerate drying too quickly, sealing in gases that later expand into blisters.

Another common cause is over-application or improper film thickness. Applying too heavy of a coat or failing to mix products thoroughly can trap solvents that try to escape as the coating cures. Always stir or mechanically mix INSECO coatings to ensure consistent formulation, then apply in even, controlled layers using the correct tool for your product—whether a brush, roller, or sprayer. Allow proper drying time between coats to promote full solvent release and crosslinking. If bubbles do appear, wait until the surface has cured, then sand lightly and reapply a thin, even coat. By following these simple but crucial steps, you can prevent coating failures and achieve a flawless, professional finish every time with INSECO INC.’s line of high-performance specialty coatings.