Professional Solutions for Blistering in Chemi Tech High-Build Coatings

High-build coatings are widely used in industrial anti-corrosion and construction projects, but blistering during application remains a common challenge. As a leading coating brand, Chemi Tech offers the following systematic solutions:  

1. Root Cause Analysis  

1. Poor substrate preparation: Residual moisture, oil, or rust reduces adhesion.  

2. Rapid solvent evaporation: High temperatures cause trapped bubbles.  

3. Inadequate mixing: Insufficient stirring leads to incomplete curing.  

4. Excessive film thickness: Thick layers hinder solvent release.  

2. Chemi Tech's Solutions  

1. Substrate Treatment  

- Clean surfaces with Chemi Tech cleaners (e.g., KMC series).  

- Achieve Sa2.5-grade blast profile (40-70μm roughness).  

2. Environmental Control 

- Maintain ambient temperature at 15-30°C with RH <85%.  

- Use slow-evaporating thinners (Diluent NT) in hot climates.  

3. Application Techniques  

- Apply multiple thin coats (max 150μm per layer).  

- Opt for Chemi Tech airless spray systems (e.g., Xtreme 5000).  

4. Defoamer Application  

- Add 0.5%-1% Foamex 810 or KM-818 defoamer with low-speed agitation.  

5. Quality Verification  

- Monitor with wet-film gauges; evaluate bubbles per ASTM D714.  

3. Technical Support

Chemi Tech provides on-site assistance. Submit application data via Website or call hotline for customized solutions.  

By implementing these measures, blistering can be minimized effectively. Always conduct patch tests prior to full-scale application.