The Crack-Pac® two-part, high solids, low-viscosity crack injection epoxy is designed to repair cracks in concrete. The mixed adhesive has the viscosity of a light oil and a low surface tension which allows it to penetrate fine to medium width cracks. Resin is contained in the cartridge and hardener is contained in the nozzle. Once the nozzle is threaded onto the cartridge, the hardener is released into the resin-filled cartridge by turning the knob at the base of the nozzle. The two components are mixed by shaking the cartridge.
| PROPERTY | | TEST METHOD | | RESULTS | Viscosity
(mixed, 72°F) | | ASTM D 2393 | | 1,400 cps | Bond strength
(moist cure) | | ASTM C 882 | 2,010 psi (2 days)
3,830 psi (14 days) | Water
absorption | | ASTM D 570 | | 0.082% (24 hrs) | | Tensile strength | | ASTM D 638 | | 5,860 psi (7 days) | Elongation
at ultimate | | ASTM D 638 | | 14.1% | Compressive
yield strength | | ASTM D 695 | | 11,270 psi (7 days) | | Compressive modulus | | ASTM D 695 | | 318,600 psi | Linear coefficient
of shrinkage | | ASTM D 2566 | | 0.002 | | Gel time (72° F) | | ASTM C 881 | | 2 hours - 60 g mass | Initial cure
(72° F) | | — | | 24 hours | | Mixing ratio | | — | | 8:1 |
SHELF LIFE
24 months from date of manufacture, unopened
USAGE TEMPERATURE:
In order for components to mix properly, the resin and hardener must be conditioned to 60°-80° F before mixing.
STORAGE CONDITIONS
For best results, store between 45° F - 95° F
COLOR
Resin - blue, hardener - clear, mixed: light amber. The color of epoxy will change from amber to blue during the cure process and then fade back to light amber within a few weeks of installation.
CLEAN UP
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 – Chip or grind off surface.
CHEMICAL RESISTANCE
Very good to excellent against distilled water, inorganic acids and alkalis. Fair to good against organic acids and alkalis, and many organic solvents. Poor against ketones.
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