Limitations:
Use on dry stone. Use on stone that is free of any oil, grease, or coatings. Some yellowing and chalking will occur when exposed to ultraviolet light.

Color:
Clear product – use Touchstone polyester colorants for tinting

Technical Data

EXPRESS II KNIFEGRADE EPOXY

Mixed Properties	Values
Mix Ratio:	2 parts A to 1 part B by volume
Pot Life @ 75°F:	5 minutes

Cured Properties	Values	Test Methods
Initial set time at 75°F:	30 minutes
Full cure time at 75°F:	within 12 hours
Tensile Break Strength:	4,779 psi	ASTM D-638
Tensile Modulus:	1,120,989 psi	ASTM D-638
Compressive Yield Strength:	14,292 psi	ASTM D-695
Compressive Modulus:	303,779 psi	ASTM D-695
Flexural Break Strength:	14,157 psi	ASTM D-790
Flexural Modulus:	608,485 psi	ASTM D-790
Tensile Elongation at break:	0.45%	ASTM D-638
Shore D Hardness:	89	ASTM D-1706

Installation

General Instructions
If using cartridges, additional usage directions are available. See our information sheet labeled “Cartridge use directions”. See separate doweling, laminating, and patching instructions for more specific instructions. CSI format specifications are available.

Surface Preparation & Use:
Use gloves, wear eye protection, and avoid skin contact. When grinding cured joints, wear a dust mask. Substrate to be bonded must be completely dry and dust free. Mix only the amount of epoxy which can be used in 10 minutes. Avoid stressing joint before complete cure of epoxy. Mask areas which must be kept free of epoxy. Clean tools with uncured epoxy using toluene or xylene. Use caution, these solvents are flammable and ensure local ventilation. Remove cured epoxy mechanically.

Mixing instructions:
All materials should be at or above 40°F. Combine the two ingredients at the following volume ratio: Two parts of Part A to one part Part B.

Temperature dependency:
Temperature will affect the working properties of the material. Every 15°F results in doubling the speed of cure. Therefore, at 90°F set time is cut in half, at 60°F the set time is doubled. Do not use on substrate at a temperature below 40°F.

Coverage:
Approximately 30 square feet per gallon when applied at a thickness of 50 mils (1/16th of an inch).

Availability

Packaging and storage
Touchstone Express is available in quarts, gallons, 5 gallon pails and cartridges. Thickening powders are available for increasing viscosity.

Warranty

This product’s warranty is limited to replacement of defective material and freight charges to destination only. Bonstone Materials Corp. is not responsible for consequential damages.