SikaFlow®-647

ASTM C881, Type I, II, and IV, Grade 1 and 2.

SikaFlow®-647 is a two-component, modified epoxy resin-based grout.

2 years (for both part A and part B) when properly stored

Store in unopened containers at temperatures at or below 80 °F (27 °C) in clean, dry conditions. Freezing temperatures during storage will not harm the product. However, the components should be conditioned to temperatures between 70° and 80 °F (21°–27 °C) prior to use.

Neat Epoxy

Epoxy Mortar*

*Test results are averages obtained under laboratory conditions using a full unit of SikaFlow®-647 mixed with
120 lbs. (54 kg) of Sikalastic®-941 aggregate. Expect reasonable variations.

Neat Epoxy

Epoxy Mortar

Epoxy Mortar

Epoxy Mortar

Flash Point

Adsorption of Epoxy Mortar

Temperature affects the working time and cure time of epoxy grouts. The foundation or concrete being grouted may be cooler than room temperature unless the temperature has been constant for significant periods. Field judgment and professional experience must be used when anticipating working time. Curing time will vary with the temperature of the environment, the surfaces being grouted, and the temperature of the mixed grout. SikaFlow®-647 can be used with an accelerator. Contact Sika Technical Support for additional information.

Working Time

The above working times assume product has been properly conditioned for cold or hot weather use.

Compressive Strength Cure Rate

2.5 gallons yields 575 in³ (0.33 ft³ or 0.009 m³) of mixed product. When estimating project requirements, be sure to account for application variables.
1.15 ft³ (0.03 m³) per full kit of SikaFlow®-647 mixed with 120 lbs. of Sikalastic®-941 aggregate.

• Do not add solvent, water, or any other material to the grout.
• Do not alter the resin or hardener proportions
• Contact your local representative for a pre-job conference to plan the installation.
• The application temperature range is from 50 to 105 °F (10 to 41 °C). Please note that above 90 ºF (32 ºC), working time will be significantly reduced.
• Neat epoxy binder should not be applied greater than ¼" (6 mm) in thickness. If greater thickness is required, contact Sika Technical Service.
• For professional use only; not for sale to or use by the general public.
• Make certain the most current versions of the product data sheet and SDS are being used.
• Proper application is the responsibility of the user. Field visits by Sika personnel are for the purpose of making technical recommendations only and not for supervising or providing quality control on the jobsite.

SikaFlow®-647 has a volume mixing ratio of 1.5 parts A to 1 part B and is compatible with plural component equipment. Note that some plural
component equipment may create fluctuations in the mixing ratio. If using a two-component, side-by-side injection pump, in which the two components are mixed at the point of discharge, pre-test the mix ratio at the pump hose inlets.

CONCRETE

1. Concrete surfaces should be clean, sound, and as oil- and water-free as possible. Excessively damaged concrete should be removed.
2. When repairing cracks in oil, water, or oil-water conditions, the bond strength will be less than for clean, dry surfaces, and will depend upon the conditions and methods employed. Field tests should be performed to determine properties for specific applications.

1. To preserve product properties, do not mix partial units.
2. Precondition all components to 70–80 ºF(21–27 ºC) for 24 hours prior to use.
3. Inspect containers prior to opening. Do not use material if containers have been punctured in transportation and storage, or show evidence of leakage.
4. Do not add thinners, solvents, or water to the product.
5. Pour the hardener (Part B) into a pail of grout resin (Part A) and stir by hand, using a spatula or paint stirring paddle, until well mixed to a uniform gray color.
6. Alternatively, a slow-speed drill and mixing paddle may be used, provided that the mixing does not produce a vortex in the material. Excessive mixing will pull air into the product, which may compromise the finished installation.

Mixing Epoxy Mortar

To prepare an epoxy mortar, slowly add the recommended amount of oven-dried aggregate (Sikalastic®-941) to the already mixed SikaFlow®-647 and mix until uniform in consistency.

Pressure Grouting Of Base Plates At Edges

This method is used to fill voids under machinery base plates.

1. If the crack or seam at the edge of the base plate is open more than 0.010" (0.25 mm), seal the edge with SikaEmaco® ADH 327.
2. Drill holes in the exposed edges of the structural member or sole plate.
3. If using an injection pump (preferred), install the pump manufacturer’s preferred ports.
4. If using a grease gun, ream out the holes to accommodate 1⁄8" or ¼" pipe taps and install grease fittings (zerks).
5. Inject SikaFlow®-647 through the fittings/ports into the void until any water or oil has been flushed out and the grout is discharged from the crack.
6. Remove the grease fittings before the grout has set to bleed off any remaining pressure.
7. If grout is not visible or does not flow out of the open fitting hole, repeat the process.
8. If this process does not result in bonding the steel and in-place grout, it is possible that the steel surface was not adequately prepared for grouting prior to the original grout placement.

Pressure Grouting Of Hollow Base Plates

1. If sounding reveals the presence of voids between the baseplate and installed machinery grout (polymer or cementitious), use this method to grout the voids.
2. Drill holes for ports or zerk fittings and as vents. Typical tapped hole sizes are 1⁄8" or ¼". Locate holes within 12 inches of one another, on center.
3. Start injection at one end of void and pump until grout is discharged from adjacent holes.
4. Move to the nearest hole where grout has appeared. Continue to inject grout using the new location. Continue this process until all air is vented and all voids filled.
5. Remove ports or fittings and check to ensure that no settlement or seepage occurred.
6. If settlement or seepage has occurred, repeat previous steps.

Small Repairs

1. Small repairs (i.e. < 10 ft² / 1 m²) should be prepared according to ICRI Guideline no. 310.2R to permit proper bond.
2. Ensure the substrate appears dry
3. Apply mixed mortar into the area to be repaired. Trowel to the desired finish with a steel trowel.
4. Allow the repair to air cure.

Uncured epoxy may be removed from tools and equipment using soap and water or a citrus degreaser. Cured material must be removed mechanically.