Crack Wicking 70 Minute Epoxy Resin 

Component "A" (resin)

Specific Gravity               1.11
Viscosity                        600 cps.
Colour                            Cloudy White

Component "B" (hardener)

Specific Gravity             1.0
Viscosity                     100 cps.
Colour                         Clear, Amber

Specific Gravity             1.08
Viscosity                     325 +/- 50 cps.
Colour                         Cloudy, Off-White
Solid by weight             100%

Mixing Ratio's          Wt.       Vol.
"A"                             80       78
"B"                             20       22

Thixotropic Version
A thixotropic version of "Crack Wicking 70 Minute Epoxy Resin" is available for cracks larger than 1mm. Please email your specific request to Johnson Group Online. 

Minimum Application Temperature
"Crack Wicking 70 Minute Epoxy Resin" should not be applied below 0°C as full physical properties may not be reached and poor flow will be experienced.

Moisture Sensitivity
"Crack Wicking 70 Minute Epoxy Resin" works well in dry or damp cracks, but is incapable of displacing excess water. Every effort should be made to keep area as dry as possible.

Physical Testing
Compressive strength         51 MPa
Tensile strength                 39 MPa

Surface Preparation
In order for proper penetration of "Crack Wicking 70 Minute Epoxy Resin", the mouth of the crack cannot be plugged with foreign material. It is also good practice to clean the surface areas around the cracks to be treated, as this will aid in allowing the material to flow to the cracks.

Mixing & Application
Pour contents of "B" into "A" and mix well with a low speed mixer (200-300 rpm) until one even colour develops. Be sure to scrape sides and bottom of container.

For treating isolated cracks, it is recommended to dam around the crack (1/2" on either side) and fill the reservoir. Hot wax from a glue gun is a quick and simple method of doing this, as is standard caulking material. The reservoir should be kept full until the material cures.

Reservoirs can also be created by drilling holes, 1.25cm. in diameter at 30 to 45 cm. intervals into the cracks. Where a large number of cracks exist in a small area the best method of application is to flood the area and squeegee the resin into the cracks.

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 = 16 litres of mixed product. Each container is clearly marked with product name, component designation ("A" or "B"), manufacturer's name, batch number and ratio of component mixtures.

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.