Uneven surfaces after waterproof coating application often result from trapped bubbles, improper mixing, or incorrect techniques. Chemi Tech defoamers effectively address these issues, ensuring uniform coating adhesion.
Key Causes:
1. Bubble Trapping: Air introduced during mixing or application forms micro-bubbles, leaving pits after drying.
2. Viscosity Issues: High viscosity hinders bubble escape; low viscosity causes sagging, both affecting smoothness.
3. Substrate Problems: Uneven substrate absorption or contamination leads to localized shrinkage or bubbling.
Chemi Tech Defoamer Benefits:
- Rapid Bubble Breaking: Advanced formulations eliminate micro-foam promptly, minimizing surface defects.
- Broad Compatibility: Works with solvent-based, water-based, and other coating systems without compromising film formation.
- High Stability: Maintains performance under high-temperature or high-shear conditions, preventing re-foaming.
Application Tips:
1. Add defoamer at 0.1%-0.5% dosage, mix at low speed to avoid new bubbles.
2. Inspect substrate flatness; sand or seal if necessary before coating.
3. Control thickness and drying speed for roller/spray applications.
Chemi Tech defoamers are widely used in waterproofing projects to enhance coating aesthetics. Contact our experts for technical support.