Moisture is one of the most common reasons floor coatings fail. Concrete slabs at ground level naturally emit invisible moisture vapor, and if that moisture isn't addressed before a coating goes down, it can lead to blistering, delamination, and costly do-overs. AquaStop E-96 Slow Cure is built specifically to solve this problem before it starts.

What Makes AquaStop E-96 Slow Cure Different

AquaStop E-96 Slow Cure is a 2:1, 100% solids, 0 VOC, two-component epoxy primer based on phenolic amine chemistry. It's engineered as a moisture barrier for concrete floors dealing with very high residual moisture, handling emissions up to 15 lbs/1,000 ft² over 24 hours. That's a significant step up from standard moisture thresholds, making it a go-to solution for slabs that wouldn't otherwise be ready for coating.

It's also suitable for calcium sulphate-based screeds with slightly elevated moisture, and works as a primer across a wide range of surfaces, including absorbent, non-absorbent, and smooth substrates. Whether the project is indoors or outdoors, AquaStop E-96 Slow Cure is designed to perform.

For context on why this matters: permissible moisture emissions for concrete are generally capped at 3 lbs/1,000 ft² over 24 hours (under 4% per calcium chloride testing), and relative humidity should stay below 85% per ASTM F2170. When moisture levels exceed these thresholds, standard coatings are at real risk of blistering and delaminating. AquaStop E-96 Slow Cure is formulated to handle conditions well beyond that baseline.

Key Advantages

• 100% solids, 0 VOC formulation
• Resistant to chemical loadings, bacteria, and moisture
• Strong penetration and grip-promoting properties
• Compatible with nearly all substrates, including damp surfaces
• Suitable for use over subfloor heating systems
• Exceeds ASTM F3010 standards
• High sealing function for increased residual moisture conditions
• Effective for single-layer applications
• Works on magnesite screeds and old sealed or coated surfaces
• Impermeable and seamless, handling emissions up to 15 lbs/1,000 ft²/24 hr

Where AquaStop E-96 Slow Cure Is Used

This primer is versatile enough to support a wide range of flooring systems and surface types, including:

• Concrete surfaces
• Decorative chips and flakes
• Decorative quartz
• Metallic coating systems
• High and thin build systems
• Mortars
• Cementitious overlays
• Polymeric flooring

The Bottom Line

High moisture concrete doesn't have to mean delayed projects or coating failures. AquaStop E-96 Slow Cure gives installers a dependable way to address even severe moisture conditions upfront, creating a stable foundation for whatever flooring system comes next.