USES
Chem-Freezer is a clear liquid binder, which requires addition of dry silica sand as custom design, to produce a convention epoxy repair mortar for repairs of deep sections in concrete floors.
Due to the special formulation of Chem-Freezer epoxy system, which cures at temperatures below -18°C, the use of product is highly commendable in:
- Commercial Freezers.
- Cold Stores.
- Very cold winters at below -18°C temperatures where repairs to concrete must be accomplished.
Chem-Freezer is extremely used in cold stores, freezers of:
- Dairies and milk processing centers.
- Fisheries and meat processing centers.
- Bottling plants.
- Commercial freezers and cold stores.
- Food, fruit and vegetable cold stores.
- Repairs to any concrete member where temperatures are very low.
- Chem-Freezer works effectively at very cold temperatures where a conventional epoxy system does not cure and fails.
TECHNICAL
Technical Data for Unmixed Parts
| Property @ 25°C (77°F) |
Resin Part A |
Hardener Part B |
Test Method |
| Solids |
100% |
100% |
– |
| Color |
Clear |
Clear |
– |
| Density, Lb/Gal (Kg/L) |
9.3 (1.12) |
8.0 (0.96) |
ASTM D1475 |
| Shelf Life |
Two years |
– |
– |
| Mix ratio A:B |
1:1 by volume |
– |
Technical Data for Mixed Parts
| Property (Mixed A & B) |
Value @ 25°C (77°C) |
Test Method |
| Density, Lb/Gal (Kg/L) |
8.6 (1.04) |
D-1475 |
| Pot life (3 oz.) |
6-8 minutes |
C-881 |
| Gel time (5 mil) |
1-2 hours |
N/A |
| Hardness (Shore) |
65-D |
D-2240 |
| Tensile strength @ 7 days, Psi (MPa) |
5140 (35) |
D-638 |
| Flexural strength@ 7 days, Psi (MPa) |
4630 (31.5) |
C-348 |
| Compressive strength @ 7 days, Psi (MPa) |
6680 (45.5) |
D-695 |
| Bond strength (24 hrs), Psi (MPa) |
1610 (11) |
C-882 |
| Bond strength Moist (11 days), Psi (MPa) |
1470 (10) |
C-882 |
| Elongation, % |
35% |
D-638 |
| Water absorption (24 HRS), % |
0.2% |
D-570 |
| Shrinkage |
Passes |
C-883 |
| Thermal compatibility |
Passes |
C-884 |
Mixing with Silica Sand with 1 part of Chem-Freezer Binder:
| System |
Size |
Ratio By volume |
Kg/L |
| As repair mortar |
Silica Sand
0.1-0.3mm
0.4-0.8mm |
2 1/2 parts
2 1/2 parts |
1.60 |
| As Tile Adhesive |
Silica Sand
0.1-0.3mm |
3 parts |
1.55 |
| As Tile Pointing Mortar |
Silica Sand
0.1-0.3mm |
2 1/2 parts |
1.50 |
Coverage:
| Application |
Coverage (Kg/mm/m2) |
| Primer |
0.25 |
| Repair Mortar (mixed with silica sand as above) |
1.6 |
| Tile Adhesive (mixed with silica sand as above) |
1.55 |
| Tile Pointing Mortar (mixed with silica sand as above) |
1.5 gm/cm3 |
APPLICATION
Limitations:
- Chem-Freezer is a cold temperature sure system. A very high exothermic reaction will occur during polymerization. When exotherm passes, the system must be cool to the temperature of the freezer about 18°
- A potential of 110°C drop in temperature from peak exotherm to cold freezer will cause shrinkage.
- The system is extremely fast curing system. Prepare all relevant requirements ready for installation prior to mixing.
- Do not inhale any vapors from the curing materials.
Surface Preparation: surface of application should be clean and sound. The surface must be free of any dust, oil, grease, laitance curing compounds or any other contaminants, which impairs bonding. The best results in adhesion are obtained on dry concrete. Do not apply on surfaces, which have been sealed with a permanent type of form oil, curing compounds or release agents. Remove these substances before applications.
Mixing Procedure: pre-condition the materials and sand to 24°C or less. Mix one part A with one part B by volume into a clean mixing container. Mix the epoxy with a slow speed drill fitted with mixing paddle attachment. Carefully scrape the sides and bottom of the pail during mixing.
- Mix only amounts that can be used within the pot life specified.
- When thoroughly mixed, add pre-weighed silica sands as per mix design given in the above table and stir with mechanical mixer for 2 minutes. Ensure the blend gives a uniform consistency.
Application:
As Repair Mortar: the area to be filled must be at least 50-75 mm deep and 100-150 mm wide. Avoid featheredges, saw cut the edges of repairs.
Use the clear binder as a primer and rub into the area to be repaired with a very thin coat using a brush and immediately after mixing the mortar, rush the mixture to the cold room and pack it into place with a trowel. Smooth the patch with a trowel until desired appearance is achieved.
For spalls deeper than 50 mm, heating of the area around the patch and into patch area is recommended.
As Tile Adhesive: this requires a very fast application technique. Pre-design the tile to be in place. Mixing smaller quantities per batch, proceed laying tiles as per standard procedure.
Spread the mixture onto the pre-treated area using a notched trowel to approx. 3 mm thickness uniformly. Lay the tiles and set them within the specified pot life period. Cured material may only be removed mechanically. Ensure the tiles are firmly placed into position. Clean the applicator tools in between batches using blended solvents.
As Tile Pointing Mortar: recommended method for pointing is to arrange the joints with masking tapes in order to prevent Chem-Freezer mortar spillage on the tiles.
Fill the joints to the desired level. Remove excess using a rubber wiper or putty knife. Remove masking tapes immediately upon completion of finishing works.
Non-colored rags wetted with blended solvents may be used to wipe of any material form the tile surfaces.
Note: make a test wipe on the tile with blended solvents for verification of color/glaze damages. If any damages to the color/glaze of tile surface avoid blended solvents.
Curing: the applied system should not be disturbed at least for a period of 6 hours.
Note: large batches of epoxy will cure much faster than small batches. Mixed epoxies will cure much faster in hot weather than in cold weather.
Cleaning: cleaning of tools, rollers, equipment, etc. can be efficiently carried out immediately after use, with CHEM-CRETE BLENDED SOLVENT, M.E.K. or other suitable solvents. Cured material may only be removed mechanically
STORAGE
The product can be stored for minimum of twelve months at temperature from +10 °C to +35 °C in the unopened original packaging. Protect from direct sunlight.
SAFETY
Health Precaution:
- Part ‘A’ – Irritant: Prolonged skin or eye contact may cause sensitization and irritation.
- Part ‘B’ – Irritant: Contact with skin or eyes may cause severe burns.
First Aid:
Skin Contact: Wash thoroughly with soap and lukewarm water.
Eye Contact: Flush immediately with clean running water and contact a Physician.
Respiratory Problems: Remove affected person to fresh air immediately and contact a Physician.
Hygiene: Wash hands immediately after use. Wash clothing before re-use.
After full curing, the product is physiologically harmless. Keep the resin and hardener away from the eyes mouth and skin. Do not inhale vapors. Uncured mixture can cause irritation of the skin. The best precaution is to wear safety protective gloves, overall, mask and goggles while working. Skin contamination should be immediately cleaned with soap and plenty of water. The use of solvents should be avoided. If resin or hardener splashes into the eyes, wash immediately with running water. A Doctor must me visited in all cases. Forced ventilation should be provided when working with solvents, etc.
WARRANTY
LIMITED WARRANTY: International Chem-Crete Inc. warrants that, at the time and place we make shipment, our materials will be of good quality and will conform to our published specifications in force on the date of acceptance of the order.
DISCLAIMER: The information contained herein is included for illustrative purposes only and, to the best of our knowledge, is accurate and reliable. International Chem-Crete Inc. is not under any circumstances liable to connection with the use of information. As International Chem-Crete Inc. has no control over the use to which others may put its products, it is recommended that the products be tested to determine the suitability for specific applications and/or our information is valid in particular circumstances. Responsibility remains with the architect or engineer, contractor and owner of the design, application and proper installation of each product. Specifier and user shall determine the suitability of the product for specific application and assume all responsibility in connection therewith. AM22319.
