Deep-Penetrating Concrete Sealers
Do-It-Yourself Basement Care & Repairs

Epoxy Crack Filler Applications

Surface Preparation

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.

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.

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. Mix in a color pigment if desired. The natural color of epoxy is light beige/gray.

Slowly add dry silica or play sand with a measuring cup at the appropriate ratio and thoroughly mix. Once mixed, let sit for five minutes to off-gas.

The pot life is two hours. We recommend that you mix only as much product as you can easily apply within half an hour.

Sand Changes the Filler's Volume and Flexibility

Pure epoxy without sand (or with little sand) can be poured right into expansion control joints, routed cracks or pit marks in concrete floors. It seeps deep into narrow cracks. The pure epoxy has the most flexibility – elongation up to 30%. It is self-leveling and after one or two passes it can be level with the surface. Flexibility is required for expansion control joints and floor-to-wall joints of floating slabs.

Adding sand makes the mixture stiffer and suitable for application on walls with a trowel. The more sand (up to 5:1 or 6:1 by volume), the more filler volume for repairs and less sag on vertical surfaces. More sand also makes the resulting filler stronger but it loses its flexibility – at the 5:1 ratio, the cured filler is rigid.

Application

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

Temperature: Above 35° F during the application and above freezing for 24 hours afterwards.

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

Cracks in Concrete Blocks or Masonry Walls: Route out the crack or joint with a grinder at least ½” deep. Tack-coat with pure epoxy using a stiff paint brush. Use 4:1 (or 5:1) sand to mixed 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 to the mixed epoxy at a ratio of 2:1 to 3:1. Apply with a trowel, smoothen with a straight edge and trowel.
Spalled or Pitted Concrete Slabs: First, repair any holes or cracks. Same application. Broadcast sand over the surface. Let set for at least two hours.
Wide Floor-to-Wall Joints: Insert foam backer rods of suitable diameter or pour in sand to contain the filler. Add sand to the epoxy at a ratio of 1:1 (or 2:1). Using a small trowel, apply the product into the joint.
Wide Cracks in Concrete Floors: Same procedure. Route out narrower cracks first.
Narrow Floor-to-Wall Joints: Route out the bottom of the block wall at least ½” deep. For floating slabs, route out the edge of the slab at least ½” deep. Add sand to the epoxy at a ratio of 1:1 and using a small trowel, force the product into the routed joint.
Hairline Cracks and Expansion Control Joints: Without adding sand, pour the epoxy into the routed crack with a small plastic watering can. It will seep deep into the crack and seek its own surface level. A second pass may be needed. Broadcast sand over the area to prevent tracking. Cover with plywood to allow immediate traffic. Cures for traffic in about 24 hours.
Small Pit Marks in Floors: Same procedure.

Clean-Up

Clean tools with water if still wet after installation. Once cured, use xylene or any aromatic solvent.

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 one year.

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telephone (203) 225-0366 or toll-free 1-800-472-0603

MADE IN USA
Products not sold through retail stores. Available exclusively from:
Radon Mitigation & Waterproofing Concrete Sealer Co.
Novion Inc., 18 L'Hermitage Drive, Shelton, CT 06484 USA
RadonSeal™ is a registered trademark. Copyright © 1998-2008. All rights reserved.