Polyprime-U

Two-component, high-solids, aromatic polyurethane primer used to promote intercoat adhesion and serve as a re-coat primer, particularly for urethane-based coating systems. When combined with Polyglaze® Hardener, it functions as a quick-drying concrete primer in vehicular and pedestrian traffic deck coating systems.

• Polyprime U consists of Side-A (Black) and Side-B (White) mixed in a 1:1 volume ratio.
• Optional additive: Polyglaze® Hardener (½ pint per 2-gallon kit or 1 quart per 10-gallon kit) to accelerate drying time.

• Primer layer for urethane coating systems
• Quick-drying primer for concrete in traffic deck coatings when Polyglaze® Hardener is added
• Suitable for use with airless sprayer, brush, or phenolic resin core roller

• Mixing Ratio: 1A:1B by volume; components must be mixed individually before combining
• Application Rate: 1 gallon/300 sqft (0.14 l/sqm)
• Dry Film Thickness: 5 ± 1 mils (127 ± 25 microns)
• Pot Life: 30–60 minutes at 75°F (24°C), 50% RH
• Tack-Free Time: 2–4 hours at 75°F (24°C), 50% RH
• Re-Coating Window: Must re-coat within 12 hours or perform a VOC-compliant solvent wipe if exceeded
• Recommended Tools: Airless sprayer, brush, or phenolic resin core roller
• Environmental Conditions: Apply when surface temperature is above 50°F (10°C) and at least 5°F (3°C) above dew point

• Not UV stable; requires UV-stable topcoat if exposed
• Very sensitive to heat and moisture: high temperature/humidity shortens pot life and cure time; low temperature/humidity delays cure
• Do not dilute; only mix what can be applied in 20 minutes
• Clean equipment with environmentally safe solvent immediately after use
• Shelf Life: 1 year in original sealed containers stored at 60–95°F (15–35°C)
• Contains isocyanates and curative materials—handle with care

This primer is typically used as part of a urethane traffic coating system, where Polyprime® U acts as the base primer layer, followed by a urethane base coat and a UV-stable topcoat such as those in the Polyglaze® product family.