Decks, balconies, and other pedestrian surfaces need a waterproofing system that can create a continuous barrier and stand up to regular use.

The ResinTech DWM Flexcoat/HPP Deck Waterproofing Membrane System pairs a high-quality liquid polyurethane base with a fast-curing High Performance Polyaspartic top coat. Together, the products create a seamless, monolithic waterproofing system for concrete, primed metal, and wood surfaces.

How the Flexcoat/HPP system works

ResinTech Flexcoat cures into a resilient, rubber-like membrane that is durable and easy to clean. In pedestrian areas, aggregate can be incorporated into the textured top layer to increase wear and slip resistance.

ResinTech HPP is a two-component polyaspartic top coat based on aliphatic chemistry. It is designed to remain color stable under UV exposure, avoiding the color shift associated with some epoxy coatings. Its 1:1 mix ratio and working time allow application by roller, brush, or spray, including in low-temperature or high-humidity conditions.

The completed system can be returned to use four hours after installation when the stated application and temperature requirements are met.

Where is this waterproofing system used?

Flexcoat/HPP is designed for areas that require an elastomeric waterproofing solution, including:

• Plazas
• Recreation decks
• Balconies
• Mechanical rooms
• Stadiums
• Athletic surfaces
• Other pedestrian areas exposed to weather and wear

Its compatibility with concrete, primed metal, and wood also makes the system adaptable to varied deck and balcony construction.

Features and benefits

• Fast return to service: The system can be used four hours after installation under the specified conditions.
• Mildew and fungus resistance: Helps protect concrete surfaces from environmental damage.
• Durability and UV resistance: Supports longer service life on exposed pedestrian surfaces.
• Recoatable construction: The system can be renewed and works with other ResinTech sealants and expansion-joint products.
• Color stability: The HPP top coat resists UV-related color shift.
• Broad application conditions: HPP can be applied in low temperatures and high humidity.
• Seamless waterproofing: The liquid-applied membrane removes the joints found in sheet-based systems.

Application overview

Application conditions, substrate preparation, and the current ResinTech data sheets must be reviewed before work begins. The source application sequence is:

1. Mix the Flexcoat. Use a spiral paint-mixing paddle at 500 rpm for at least five minutes.
2. Apply the base coat. Install Flexcoat at 40–64 square feet per gallon, or 25–40 wet mils (0.6–1 mm), across the full area and over detail coats, excluding expansion joints. A notched squeegee is preferred. Cross-rolling can level the coating when necessary, and a solvent-resistant 3/8-inch to 1/2-inch (9.5–12.7 mm) medium-nap roller can also be used.
3. Allow the membrane to cure. Let Flexcoat cure for at least four to six hours, but no longer than 24 hours. Temperature and humidity affect cure rates.
4. Address an extended recoat window. If Flexcoat has cured for 24 hours or longer under optimal temperature conditions, clean the surface with a damp cloth using Xylene without saturating it, then prime with ResinTech TUE Primer. Contact a ResinTech representative when there is any question about whether priming is required.
5. Install the HPP top coat. Mix HPP components A and B, add the selected pigment, and mix for two minutes. Pour the mixture onto the base coat, spread it with a squeegee, and back-roll with a 10-mil nap roller. Broadcast sand and back-roll again to encapsulate the aggregate. Prepare only enough material to apply within ten minutes. For smaller quantities, maintain the 1:1 ratio.

At temperatures above 20°C, wait four hours before opening the finished area to traffic.

One system for waterproofing and wear protection

Flexcoat supplies the resilient waterproofing membrane. HPP supplies fast-curing, UV-stable surface protection. The aggregate broadcast can add the texture required for pedestrian wear and slip resistance.

That layered approach makes ResinTech DWM Flexcoat/HPP a practical system for exposed decks, balconies, plazas, and other surfaces where waterproofing, durability, and appearance must work together. Contact ResinTech or Canopus Supply for current data sheets, system design, and application guidance.