Poly-Caulk^® PX27GG (Gun Grade) is a two component, 1:3 (A:B) ratio by volume, non-sag, high solids polyurethane sealant.

Poly-Caulk PX27GG – High Solids, Non-Sag, Gun Grade Polyurethane Joint Sealant

 Poly-Caulk PX27GG is a two-component polyurethane sealant designed for interior and exterior horizontal concrete surfaces. It is particularly used for sealing and repairing control joints, random cracks, saw cuts, spalls, and T-joints. The material is suited for environments with limited downtime, such as airports, bridge headers, truck aprons, parking garages, and industrial or manufacturing floors.

·       Side-A (0.375 gallons) and Side-B (1.125 gallons) mixed in a 1A:3B volume ratio.

·       Primer: Polyprime 2180 or Polyprime EBF-LV is required for all surfaces prior to application.

·       Backer rod should be used in control joints (maximum depth: 25% of slab depth). Construction joints are to be filled without a backer rod.

 This product is used for:

·       Sealing control and construction joints.

·       Repairing random cracks and spalls.

·       Sealing saw/utility cuts and truck aprons.

·       Joints in areas subject to temperature fluctuations and heavy traffic.

·       Mixing: Pre-mix Side-B; then mix Side-A into Side-B using a mechanical mixer for at least 5 minutes. Avoid whipping air into the mix.

·       Application Tools: Caulking gun, hand pressure applicator, or poured directly.

·       Temperature Limits: Apply between 40°F (4.4°C) and 135°F (57°C). Product should be conditioned to 75–80°F (24–27°C) prior to application.

·       Pot Life: 25 ± 5 minutes at 75°F (24°C), 50% RH.

·       Tack-Free Time: 12–24 hours.

·       Cure Time: 36–48 hours before exposure to traffic.

·       Thickness & Coverage: Refer to detailed coverage table (page 1) based on joint width and depth; e.g., a 1/2" x 1/2" joint yields ~77 linear feet per gallon. No backer rod is needed in construction joints; random crack repairs require a minimum 2" depth.

·       UV Resistance: Not UV-stable – discoloration will occur under UV exposure, though physical properties remain unchanged.

·       Shelf Life: 1 year in factory-sealed containers when stored at 60–95°F (15–35°C).

·       Chemical Warning: Contains isocyanates and curatives – proper safety procedures are required.

·       Waste Disposal: Mixed and cured product can be disposed of without restrictions; check regulations for uncured components.

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