20 ft. DIY Foundation Crack Repair Kit
The below instructions are applicable whether injecting with polyurethane (Emecole Metro 102 Premium Polyurethane Foam) or epoxy (Emecole Metro 121 Fast Curing Premium Epoxy), whether using the standard surface seal (Emecole Metro 302 Premium Surface Seal) or the upgraded peelable surface seal (Emecole Metro 322 Premium Surface Seal-n-Peel).
Place drop cloth on the floor in front of work area. Clean the surface surrounding the crack using the wire brush. Remove loose or flaking concrete, efflorescence, paint or coating to approximately 1-2 inches on either side of the crack. Wipe the surface clean of dust after brushing. The surface must be dry for proper installation of injection ports and surface seal. For best results if the surface is wet, wait a few days until dry or if necessary, use a hot air gun, hair drier, or oil free compressed air to dry.
Surface Port Placement
Ports are placed apart the thickness of the concrete wall (usually about 8”) centered over the crack, starting at a point closest to the floor (vertical cracks). Mark port locations on the wall.
Surface Port Attachment & Sealing of the Crack
- If using standard surface seal… Prepare adhesive using separate wooden sticks to remove equal amounts of Parts A and Part B, about a Tablespoon from each jar. Sticks should not be shared between containers to prevent remaining material from hardening. Place equal amounts of material on a scrap piece of cardboard and mix with the trowel (repeat this step each time you run out of mixed material).
- If using upgraded peelable surface seal… Place the cartridge in your caulking gun. Remove the plastic nut and then twist and pull to remove the plastic seal. Dispense approximately 2 tablespoons from the tube onto scrap cardboard. Mix with trowel or mixing sticks (repeat this step each time you run out of mixed adhesive).
- Remove the cap from the surface port then apply a small amount of mixed material to the bottom of the port base. Place the first port starting at the bottom of the crack, repeat every 8” until the entire crack is ported. For cracks that reach the cove (where the wall meets the floor), place the bottom port 6” above the bottom of the crack and repeat every 8 inches.
NOTE! Do not allow material to block the bottom of the port opening or the crack under it.
- The next step is to work the mixed material along the entire length of the crack using the plastic trowel. The recommended material application is 1/8” thick and 2” wide. Make sure to mound sufficient extra material around the base of the ports. Expect to use 16 ounces, the total amount provided, for an 8-foot crack. Do not work the material “into” the crack, just paste over the surface.
- Let the surface seal and port adhesive material cure before beginning injection (not recommended to wait overnight).
- Approx. 1 hour with standard surface seal
- Approx. 35 to 45 minutes with upgraded peelable surface seal
- If injecting with polyurethane, flush the crack with 1-2 cups of water poured into the top port using plastic bottle or by filling the hose assembly several times. Water should come out of every port below the top port indicating that the crack is contiguous and that ports are not blocked by epoxy. Water is also necessary to aid in resin activation (skip this step if injecting with epoxy).
- Remove the plastic cap from the polyurethane or epoxy cartridge and then twist and pull to remove the plastic seal. Place the restrictor on the cartridge and then place the mixing nozzle over the restrictor on the cartridge and attach with the plastic nut. Place the cartridge in your caulking gun.
- Attach the flexible hose assembly (wide end) over the mixer tip by pushing firmly.
- For vertical cracks attach the small end of the hose assembly into the lowest port by pressing firmly. For horizontal cracks begin at either end if one is not lower than the other.
- Begin injecting slowly with low pressure (allowing the injected material time to flow into and fill all small fissures). Wait until the injected material begins to flow from the port above it. Use the white plastic pinch valve on the hose assembly to turn off material flow, plugging the first port with the cap provided, and move up to the next port. Repeat this procedure until the entire crack has been injected.
Note: The secret to effective crack injection is patient low-pressure injection of the polyurethane or epoxy material. Small or hairline cracks will require 3 – 4 minutes at each port for proper filling to take place.
If using standard surface seal… The ports can be removed by striking with a hammer, three to four hours after completing the injection. The surface seal material is paintable if desired. Place all disposable items on drop cloth which is a garbage bag and dispose of properly.
If using upgraded peelable surface seal… The Surface Seal-n-Peel and ports can be removed by pulling on the starter tab, three to four hours after completing the injection. Place all disposable items on drop cloth which can be used as a garbage bag. Dispose of properly.