Simpson Crack-Pac Flex-H20:

Crack-Pac Flex-H20 is a single component hydrophobic polyurethane injection resin designed to seal leaking cracks, voids or fractures in concrete or solid masonry.
The polyurethane is packaged in the cartridge and an accelerator
is packaged in the nozzle. When the two are combined in the cartridge and mixed, the result is a low viscosity, water activated polyurethane.

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.

Crack-Pac FEATURES:
• Seals seeping or mildly leaking cracks
• 4 00% elongation provides a flexible seal for moving
   cracks
• Can be dispensed with a standard caulking tool
• Can also be used on dry cracks
• E xpands to fill voids and close off the back of the crack
• E xpanding nature makes it suitable for sealing cracks
   in solid masonry
• 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).
• N on-shrinking hydrophobic formula with the elongation
   and flexibility of a hydrophilic resin
• 20:1 expansion ratio (unrestricted rise) means less
   material needed

APPLICATION:
• Suitable for sealing cracks ranging from ¹⁄32 " to ¹⁄4"
   wide in concrete and solid masonry. Can be used to
   repair 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.

SHELF LIFE:
• 12 months from the date of manufacture, unopened.

USAGE TEMPERATURE:
• 60°- 90°F

STORAGE CONDITIONS:
• For best results store in a dry area between 45°- 95°F.

Product is very moisture sensitive.
COLOR:
• Polyurethane - Clear; Accelerator - Green; Cured - Green.

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.), laquer 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.