Construction Waterproofing FAQs

Waterproofing is designed to protect concrete and masonry from hydrostatic pressure and helps accommodate minor shrinkage cracks in concrete below grade.

Dampproofing is strictly for moisture control and vapor resistance where water pressure is not present. The correct choice depends on site conditions, soil saturation, and structural exposure.

Coverage varies by product and application conditions:

• Deco 20 Seal: Approximately 60 sq. ft. per gallon (about $0.35 per sq. ft.)
• Deco 20 Dampproof: Approximately 120 sq. ft. per gallon (about $0.15 per sq. ft.)
• Deco 20 Penetrating Concrete Sealer: Approximately 200–375 sq. ft. per gallon (about $0.07–$0.15 per sq. ft.)

Actual coverage depends on surface porosity, substrate condition, and application method.

Average material costs are approximately $0.40 per sq. ft. for Deco 20 Seal, $0.15 per sq. ft. for Deco 20 Dampproof, and $0.12 per sq. ft. for Deco 20 Penetrating Concrete Sealer. Pricing may vary based on freight, availability, and regional distribution.

Dry times vary based on climate conditions. In humid environments, drying typically takes about 48 hours. In drier climates, products may be ready in approximately 24 hours. Always ensure the material has fully cured before backfilling or proceeding with construction.

Application is recommended at 28°F and rising on the day of installation. Because Deco Products are water-based, freezing conditions should be avoided to prevent material damage and ensure proper adhesion.

Yes. Once cured, Deco Products allow for stucco, paint, and other compatible materials to be applied over the surface without compromising performance.

Deco 20 Seal and Deco 20 Dampproof can be applied over existing coatings; however, performance cannot be guaranteed if the underlying coating fails. The Clear Sealer should not be applied over other coatings.

Yes. Deco Products can be applied using a roller or paint paintbrush. However, using a sprayer typically reduces wasted product and provides a more seamless, uniform application.

Tie Patch is required when waterproofing. All tie holes, imperfections, and penetrations below grade must be patched using Tie Patch or another approved method, such as hydraulic cement, to ensure proper performance.

Deco products are commonly used on:

• Foundations and basements
• Retaining walls
• Parking structures
• Water features and planters
• Below-grade concrete and masonry surfaces requiring hydrostatic protection

These systems are designed specifically for professional applicators working on commercial, industrial, and multi-unit projects.

Deco 20 Seal provides flexibility to resist minor shrinkage cracks that naturally occur in concrete.

Yes. Deco Products are engineered for contractors, applicators, and decision-makers who require reliable, environmentally safe waterproofing products for commercial, industrial, and large-scale construction projects.

Selecting the right product depends on your application needs:

• Moisture control only: Deco 20 Dampproof
• Hydrostatic pressure or below-grade waterproofing: Deco 20 Seal
• Concrete protection and durability enhancement: Deco 20 Penetrating Concrete Sealer

A Deco Products representative can help evaluate project conditions and recommend the appropriate solution.

Concrete surfaces should be clean, sound, and free of debris, dust, and contaminants. All voids, tie holes, and imperfections below grade must be properly patched prior to application to ensure optimal adhesion and performance.