Cold Weather Injection Epoxy

Use
When correctly used, "Cold Weather Injection Epoxy" fully penetrates cracks to restore structural integrity. As temperatures drops from 20°C to 0°C, the viscosity of this resin system does not increase as much as other systems. This feature improves the efficiency of the injection process.

Component "A" (resin)

Specific Gravity               1.11
Viscosity                        260 cps.
Colour Lt.                       Amber

Component "B" (hardener)

Specific Gravity             0.98
Viscosity                     300 cps.
Colour                         Amber

Specific Gravity             1.1
Viscosity                     *210 cps.
Colour Lt.                     Straw
Solid by weight             100%
*mixed viscosity at 4°C is 1,015 cps. compared to 4,500 cps. for the "Slow Set 85 Injection Epoxy - Fine Cracks" product. Rate of flow is directly proportional to the resin viscosity. The four times faster flow in cold concrete cracks can be worth a lot of saved money for pressure grouters.

"A"                             80       78
"B"                             20       22

Pot Life 200 g. @ 25°C                 20 mins.
Tack free time @ 10°C/25°C         15/5 hrs.
Through cure  @ 10°C/25°C           30/9 hrs.

Minimum Application Temperature
"Cold Weather Injection Epoxy" cures at temperatures down to 0°C.

Moisture Sensitivity
This injection resin will displace water in cracks but it should be noted that when cracks are very fine (0.25mm) the crack must be dry to obtain a structural repair.

Physical Testing

*compressive strength         58 MPa
*tensile strength                 46 MPa

Surface Preparation
The area adjacent to the crack must be cleaned to obtain good adhesion. "Heavy Epoxy Paste - Regular Set" is used to seal the crack and the injection devices. "Heavy Epoxy Paste - Rapid Set 60" is faster curing bonder, where quick turnaround is important. These devices may be plastic packers, tees or ports, depending on the technique used. Plastic tees are placed on top of the crack. The placing of the injection devices is critical. Foreign material in a crack may be a major factor in the success of injection. It is usually possible to flush cracks to remove contaminants. A thorough study in this regard is always necessary.

Mixing & Application
"Cold Weather Injection Epoxy" can be injected using plural feed injection machines capable of dispensing at the required ratio by volume.

1. After the crack has been prepared for the injection process, resin is pumped from one port (or plastic tee) to the next in sequence. On a vertical crack, start at the lowest injection device. If there is water in the crack, it must be expelled by the resin being injected and this phase must continue until clear, water-free resin is emerging from the next port or plastic tee.

2. The injection process must be continued until the entire crack is filled with resin.

3. On large projects, test samples of the resin being injected should be taken before, during and after the injection is complete. It is imperative that the injection process be continuously monitored to ensure that the resin is properly mixed and will cure satisfactorily. Core samples may be taken to verify the efficacy of the process.

Clean Up
Use appropriate "Cleaning Solvent". CAUTION - Solvent is flammable so there must be no open lights, flames, sparking motors or pilot lights in the vicinity. Smoking near the solvent is to be forbidden. All equipment must be cleaned immediately after use.

Safety and Toxicity
Two-component epoxy systems are capable of producing severe injury to, or destruction of, skin and eye tissues. They are classified as corrosive for shipping purposes. Precautions must be taken to prevent prolonged or repeated skin contact and it is essential to protect the eyes from splashes. Protective clothing, rubber gloves and chemical goggles should be worn when working with these products. Some people become sensitized when working with epoxy resin systems. The sensitization may appear in the form of skin or respiratory reactions. Avoid breathing vapours, particularly if these products are used in a confined area. Face mask with respirator #1224 is usually adequate. Air supplied mask is suitable for use in confined areas.

Storage
Store in heated area and on pallets. Do not allow product to freeze. Shelf life in unopened containers is two years.

Packaging
Packaged in 4 litre units, 4 units per carton. Each container is clearly marked with product name, component designation ("A" or "B"), manufacturer's name, batch number and ratio of component mixtures. Alternative packaging for "Cold Weather Injection Epoxy" is in side by side cartridges - 300 mls. "A", 75 mls. "B". This is injected using a 4:1 manual cartridge gun or pneumatic air gun, through a 1/4" 32 element mix tube which produces a fully mixed product for injection.

Warranty
Manufacturer WARRANTS that the product conforms to its chemical description and is reasonably fit for the purpose stated on its Technical Bulletin when used in accordance with its directions. Manufacturer makes NO OTHER WARRANTY either expressed or implied. Buyer assumes all risk in handling.