Surface Engineering: Critical Preparation Standards for Heavy-Traffic Polyurethane Concrete Decks

The Secret Behind 5B Cross-Cut Adhesion:

• When heavy vehicles or high-heel pedestrian streams track across a rooftop platform, they exert massive horizontal pulling forces. If your coating peels, the failure rarely stems from the paint itself—it stems from poor surface engineering.

The Technical Standards For Success:

• Laitance Removal:

  Weak cement laitance and old curing agents must be mechanically stripped via captive shot-blasting or diamond grinding to open concrete capillaries, achieving an international ICRI CSP 2-4 profile.

• Moisture Control:

  Trapped concrete moisture must drop below 5% to prevent rising solar heat from vaporizing the water, which builds up under-film pressure and causes blistering.

• Deep Penetration Priming:

  Utilizing specialized high-solids waterborne epoxy primers to bind loose dust micro-particles, forging an unbreakable physical and chemical weld with our heavy-duty liquid-applied polyurethane topcoats.