Epoxy Crack Filler Application

Surface Preparation

The surface must be clean. Remove loose concrete, dirt, asphalt, grease, and any bond inhibiting material. Blow clean with an air blower and remove dust with a damp rag. Surface may be slightly damp, but a dry surface is recommended for best results.

Route out cracks with a hand-held grinder to ½” minimum depth. Leaky tie rods – chisel out the concrete around the rod at least ½” deep.

Mixing the Filler

Shake, roll, or stir separately compounds A and B using separate mixing tools – do not cross contaminate! 

Using the measuring cups, pour equal amounts of A and B compounds into a larger mixing container. Mix together using the mixer in a slow-speed electric drill until the color is uniform. The natural color of epoxy is light beige/gray. Mix in a color pigment if desired. If needed, slowly add DRY silica or construction sand (WITHOUT FINES) with a measuring cup at the appropriate ratio and thoroughly mix.

Once mixed, let sit for fifteen (15) minutes to off-gas. The pot life is short. Mix only as much product as you can easily apply within half an hour.

Application

Pour the pure epoxy into the crack with a small plastic watering can, a ketchup-style squeeze bottle, the measuring cup or similar.

Temperature: Above 40° F during the application and for 24 hours afterwards.

Cracks: First, tack-coat the routed cracks or joints with pure epoxy without sand using a stiff paint brush.

Narrow Cracks in Concrete Floors

Route out the crack about 1/2" deep with a hand-held grinder. If needed, fill the bottom of the crack with sand or caulk to prevent the epoxy from running out. Pour the epoxy into the routed crack with a small plastic watering can or cup. In the first pass, make the surfaces tacky. With the second pass, fill it to the top. Broadcast sand over the area to prevent tracking. Cover with plywood to allow immediate traffic. Cures for traffic in about 24 hours.

Wide Cracks in Concrete Floors

Insert foam backer rods of suitable diameter or pour in sand first, leaving about 1/2" for the epoxy filler.

Cracks in Concrete Blocks or Masonry Walls

Route out the crack or joint with a grinder about ½” deep. Tack-coat with pure epoxy using a stiff paint brush. Use 5:1 (or 6:1) sand to epoxy ratio and force it into the crack with a small trowel, starting at the bottom.

Holes or Penetrations in Poured Concrete Walls

Same procedure.

Holes or Divots in Concrete Slabs

Add sand at a 2:1 to 3:1 sand to epoxy ratio. Apply with a trowel and smoothen with a straight edge and trowel.

Spalled or Pitted Concrete Slabs  

Same application. Broadcast sand over the surface before it cures. Let set for at least two hours.

Leaking Concrete Blocks

Add sand at a 2:1 to 3:1 sand to epoxy ratio. Apply with a trowel, pushing hard to fill the pores.

Clean-Up

Clean tools with water if still wet after installation. Once cured, you have to use xylene or an aromatic solvent.

Curing Time

Curing depends greatly on the temperature:

	80°F and higher	45 minutes – 1.5 hours
	65°F to 79°F	1 hour – 3 hours
	50°F to 64°F	3 hours – 4 hours
	49°F and below	4 hours – 8 hours

Precautions

Always use proper industrial hygiene procedures. Refer to Material Safety Data Sheet for further details.

Eye Protection: Safety glasses.

Ventilation:  General vapors may irritate eyes, nose and throat. Ventilate the area adequately.

Clothing: Gloves recommended.

Keep out of reach of children!

Disclaimer

We shall not be liable for any injury, loss, damage, direct, indirect, or consequential arising out of the use of this product. The buyer shall determine the suitability of the product for the intended use and assumes all risk and liability whatsoever in connection with the use of this product.

Storage 

Store unopened in a dry location out of direct sunlight, in temperatures above freezing but below 100° F for up to six months.