Basement and foundation walls

Basement Repair Kit

Stop a leaking crack in a foundation wall from the inside. The kit seals the crack face, then fills the crack with HyperFlex, a grout that reacts with water and expands to seal it.

Up to 10 ft of crack Cracks up to ½″ wide No drilling or digging Poured concrete, brick or stone

Where to buy Watch the video

or watch on YouTube

Seal the crack from the inside

Everything happens from the basement side. Epoxy seals the crack face and holds the ports. HyperFlex goes in through the ports and fills the crack behind it.

10 ft

Of crack per kit

Each kit is made for up to 10 linear feet of crack.

½″ wide

Vertical or diagonal

For cracks up to ½″ wide in poured concrete, brick or stone walls.

BCR-KIT1 Basement Repair Kit

Wet or dry

Works on damp walls

HyperFlex bonds to wet or dry concrete. It needs water to react.

NSF 61

Certified grout

HyperFlex is certified to NSF/ANSI/CAN 61.

Why fill the crack

HyperFlex follows the water

A crack is the path water takes through the wall. Covering the face of it doesn’t close that path.

Cross-section of a foundation wall: the epoxy seals the crack on the basement side, and HyperFlex fills the crack from the port toward the soil side, reacting and expanding where it meets the water

Basement side Wall Soil side

HyperFlex grout, expanding as it meets water

Epoxy surface seal and port

Water

1 A patch only covers the face

Water can still move through the crack behind it and come out somewhere else on the wall.

2 HyperFlex fills the path

It goes in through the ports and reacts with the water it meets and expands to fill the crack. It reacts slowly, so it travels farther into the crack before it sets.

3 It stays flexible

Cured HyperFlex stays flexible, so it can handle small movement in the wall.

Finishing your basement?

Fix the leak first. Once framing, drywall and flooring go up, a leaking crack is hidden, and the water damage happens out of sight.

BCR-KIT1

10 ft Basement and Foundation Wall Crack Repair Kit

For vertical or diagonal cracks up to ½″ wide in poured concrete, brick or stone foundation walls. Not for concrete block.

What’s in the kit

2 HyperFlex cartridges
Two-part surface seal epoxy (A and B)
Pow-R-Stick putty to hold the ports
15 injection ports, 2 injection hoses and 2 nozzles
Squeeze water bottle, 2″ putty knife and 4 mixing sticks
4 pairs of nitrile gloves and a drop cloth

See it done

Watch a crack get sealed with the kit, start to finish.

Four steps

We recommend two days: ports and epoxy on day one, HyperFlex the next day.

Step 1 of 4 · Day 1

Prep the crack

Scrub the crack with a stiff brush and scuff off any paint or sealer. Mark a port location every 8″ along the crack.

Step 2 of 4 · Day 1

Ports and epoxy

Set each port on its mark with a ring of Pow-R-Stick putty so it stays on during injection. Spread 1/8″ of epoxy over the crack and around each port. Let it cure at least 6 hours, or overnight.

Step 3 of 4 · Day 2

Inject HyperFlex

Flush water through the ports from the top so the crack is wet. Then inject HyperFlex from the bottom port up, moving on when foam shows at the next port.

Step 4 of 4 · Day 2

Finish

Let the foam cure about 90 minutes. Knock off the ports with a hammer and chisel, then sand or scrape the epoxy smooth if you like.

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You’ll need safety glasses, a stiff bristle brush, a marking pen, a caulk gun, a hammer, a chisel and pliers. For the best epoxy bond, keep the wall around the crack clean and dry. HyperFlex needs water to react, so you’ll wet the crack itself before injecting. In a cold basement, warm the cartridges to about 68°F in a bucket of hot water before you start.

Specifications

Part	BCR-KIT1 10 ft Basement and Foundation Wall Crack Repair Kit
Repairs	Up to 10 linear feet of vertical or diagonal crack, up to ½″ wide
Walls	Poured concrete, brick or stone. Not for concrete block walls.
Grout	HyperFlex pre-catalyzed hydrophobic polyurethane, closed cell, 2 cartridges
Grout expansion	Up to 20:1 free rise when it reacts with water
Certification	HyperFlex is NSF 61 certified
Grout storage	Keep sealed until use, store under 80°F; 2-year minimum shelf life unopened
Grout data	HyperFlex sell sheet (PDF)

Common questions

What cracks can I fix with it?

Vertical or diagonal cracks up to ½″ wide in poured concrete, brick or stone foundation walls. One kit covers up to 10 feet of crack. It isn’t made for concrete block walls or horizontal structural cracks.

How long does the repair take?

We recommend two days. On day one, prep the crack, set the ports with the Pow-R-Stick putty and apply the epoxy, then let it dry overnight. On day two, inject the HyperFlex and remove the ports. The epoxy needs at least 6 hours to cure before you inject, so if you start early you may be able to finish that evening. Overnight gives the best results.

Can I use it on a crack that’s leaking now?

Yes. HyperFlex bonds to wet surfaces and needs water to react. If the grout washes out of a fast-flowing leak before it reacts, contact Fernco before you start.

Do I have to drill into the wall?

No. The ports sit on the surface of the crack and the epoxy holds them in place. There’s no drilling and no digging outside.

Is it a structural repair?

No. The kit seals a crack against water. If the wall is bowing, shifting or the crack keeps getting wider, have the foundation checked by a pro.

What does NSF 61 mean?

NSF/ANSI/CAN 61 is the standard for materials that come in contact with drinking water. HyperFlex grout is certified to it.

Where can I buy it?

See where to buy for stores and online sellers.

What if my crack is longer than 10 feet?

Use a second kit for the extra length.

Documents and downloads

The kit sell sheet and installation instructions, the HyperFlex grout sell sheet and the Fernco plumbing catalog.