Simpson Strong-Tie Crack-Pac Flex-H2O Polyurethane Crack Sealer

The Crack-Pac Flex-H₂O polyurethane injection resin seals leaking cracks, voids or fractures from 1/32" to 1/4" wide in concrete or solid masonry. Designed to perform in applications where water is seeping or mildly leaking from the crack, the polyurethane is packaged in the cartridge and an accelerator is packaged in the nozzle. When the resin encounters water as it is injected into the crack, it becomes an expanding foam that provides a flexible seal in leaking and non-leaking cracks.

• Can be dispensed with a standard caulking tool
• Can also be used on dry cracks if water is introduced to affected area
• Can be used with a reduced amount or without accelerator to slow down reaction time
• Expands to fill voids and seal the affected area
• Fast reacting - reaction begins within 1 minute after exposure to moisture; expansion may be completed within 3 minutes (depending on the amount of moisture and the ambient temperature)
• 20:1 expansion ratio (unrestricted rise) means less material needed

Specifications (all models)

• Packaging Type: Box
• Clean Up: Uncured material - Wipe up with cotton cloths. If desired scrub area with abrasive, waterbased cleaner and flush with water. If approved, solvents such as ketones (MEK, acetone, etc.), lacquer thinner, or adhesive remover can be used. DO NOT USE SOLVENTS TO CLEAN ADHESIVE FROM SKIN. Take appropriate precautions when handling flammable solvents. Solvents may damage surfaces to which they are applied. Cured material - scrape or brush off surface with a putty knife or wire brush. Tip: wetting the concrete or masonry surface immediately prior to injection will make cured resin easier to remove.
• Color (Text): Polyurethane - clear; accelerator - green; cured - green
• VOC: 3 grams/liter
• Storage Conditions: For best results, store in a dry area between 45°F (7°C) and 90°F (32°C); product is very moisture sensitive
• Shelf Life: 12 months from the date of manufacture, unopened
• Application: Suitable for sealing cracks ranging from 1/32-in. to 1/4-in. wide in concrete and solid masonry; suitable for repair of cracks in dry, damp and wet conditions with excellent results; designed to perform in applications where water is seeping or mildly leaking from the crack
• Compatible Tools: Simpson Strong-Tie: CDT10S