SIKA Sikaflex Crack Flex Sealant - Gray, High-Performance Polyurethane, Self-Leveling, Textured - Waterproof Seal for Horizontal Cracks - 10.1 fl. oz (Pack of 12)
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Availability:
In Stock.
Arrives
Saturday, Oct 10
Size: 10.1 Fl Oz (Pack of 12)
Features
- TIGHT, WATERPROOF SEALS Sika self-leveling sealant provides an ideal solution for cracks found in concrete pavement, driveways, walkways, terraces, decks, and other horizontal surfaces
- ELASTICITY RESISTS CRACKING AND TEARING Sika pro sealant incorporates a high elasticity that allows for movement between bonded surfaces. This helps prevent damage to the caulk for a better seal
- TEXTURED TO BLEND Colored gray to blend with sidewalks and driveways, this caulk features a special texturing to better match the look and feel of everyday concrete, cement, and similar surfaces
- LONG-LASTING PROTECTION Once cured, the seal is waterproof and water immersible, so rainwater and garden runoff won't hurt it. And, it's formulated to resist weathering and aging too
- LONG-LASTING PROTECTION Once cured, the seal is waterproof and water immersible, so rainwater and garden runoff won't hurt it. And, it's formulated to resist weathering and aging too
Description
If your driveway, sidewalk, balcony, steps, or other concrete or cement surface has cracks or gapping, Sikaflex Crack Flex sealant is the solution you need. This is a one-component, premium-grade polyurethane sealant that, once cured, offers waterproof protection and long-lasting durability. Simply insert the compact cartridge into a standard caulk gun and you're ready to go. The sealant is self-leveling, so there's no need to tool it down or shape it into the crack. And, it's specially textured to better blend with the pavement. The sealant features high elasticity to allow for movement and prevent tearing for a longer-lasting seal.
Material: Polyurethane
Brand: SIKA
Style: Crack Flex Sealant (Pack of 12)
Item Weight: 11.9 pounds
Item dimensions L x W x H: 8 x 6 x 12 inches
Brand Name: SIKA
Unit Count: 1 Count
Global Trade Identification Number:
Number of Items: 12
Included Components: Sealant
Manufacturer: SIKA CORPORATION
Model: 515306
Part Number: 427706
Item Weight: 11.9 pounds
Item Dimensions: 8 x 6 x 12 inches
Water Resistance Level: Waterproof
Item Form: Liquid
Compatible Material: Concrete, Metal
Style Name: Crack Flex Sealant (Pack of 12)
Color: Gray
Surface Recommendation: Concrete
Material Type: Polyurethane
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Oct 10
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 10.1 Fl Oz (Pack of 12)
I installed this product on a 20 x 40 in ground pool between the coping and concrete deck. The key is your preparation work. Dug out all the old grout sealer, wire wheeled down to the bare concrete. Used foam backer rod. The best part about this sealer is its self leveling. No need to tape off if you take your time. The finished product is absolutely perfect. It transforms the look into a brand new pool. What a difference!! Also cured beautifully. Highly recommend.
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Reviewed in the United States on August 10, 2026 by JeffPats
Size: Pack of 1
I filled at least 100 foot of cracks in my drive way after using a crack chaser grinding wheel and SIKA flex sealant I have used other brands but for the little extra cost sikaflex sets up faster and dries quicker than 2 other brands I have used which helps to prevent anyone from smearing and tracking wet sealant across the cement.
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Reviewed in the United States on June 18, 2026 by Donna W.
Size: Pack of 1
this product did exactly what i need it to do. dried pretty quickly havent had any issues. i did need to buy a handful to finish my project. looking forward to possibly having more product for the cost.
Reviewed in the United States on June 7, 2026 by Mommyof3basedinphilly
Size: 10.1 Fl Oz (Pack of 12)
easy to use and self leveling, will purchase again
Reviewed in the United States on July 16, 2026 by TJ
Size: Pack of 1
The gray water tank on my class A RV was smelling terrible. It was getting inside the living area and making everything smell terrible. I couldn’t find a leak anywhere. When I looked at all the connections and the tank, the only thing I could find was how this pipe went into the top of the tank, there was no rubber connection with clamps. That seemed very suspicious to me. It just appeared to be stuck into the top of the tank, and sealed in there with what appeared to be plumbers putty. I called the manufacturer and asked if this was how it was supposed to be. I would purchase a rubber connection if it was available. They said they are still doing it this way and if they have a problem to use a Sikaflex gray compound. I purchased a tube, and although the pipe comes out of the top of the tank I used the self leveling compound. I started applying it above the suspect area and let it flow down over the existing stuff and let it flow onto the top of the tank. It actually made a very nice looking cone shaped seal. By that evening, I could tell the smell was getting better. It’s been about two weeks and you can’t detect it in the RV anymore. I have aired out the basement in the RV and that seems fine now too. I would highly recommend this flexible sealant. It’s amazing how flexible it is and how well it sealed this connection. We suffered with the smell for years until I had checked every fitting and the tank. The only thing left was this connection, but it appeared fine. The crack filling abilities of this self leveling system must have flowed into the source of the problem! Best ten bucks I’ve spent in a long time!
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Reviewed in the United States on September 1, 2023 by Janine
Size: Pack of 1
I bought this crack sealant because weeds kept growing between the cracks in the concrete around my garage. I cleaned out the cracks and applied the sealant, and I was impressed with how easy it was to use. It self-levels nicely and blends in surprisingly well with the existing concrete. Right after applying it, I sprinkled a little dirt over the surface to help it blend in even better with the surrounding concrete. The next day, it had hardened, but I could still feel that it had some flexibility, which should allow it to move slightly with changes in temperature and stress. I originally purchased just one, thinking that would be enough for the cracks around my garage. After seeing how well it turned out, I’m now planning to use it to seal the cracks throughout the entire front area of my house. So far, I’m very happy with the results. Easy application, good appearance, and it seems to have the flexibility I was looking for. Definitely buying more!
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Reviewed in the United States on August 25, 2026 by Shawn
Size: Pack of 1
Jay Fray delivering the balanced truth about this SIKA Sikaflex Crack Flex sealant in gray that provides decent sealing capability with some performance limitations! Purchased this SIKA Sikaflex Crack Flex gray sealant for concrete crack repair and sealing applications on construction projects and foundation maintenance work. The sealant performs decently for basic crack sealing though doesn’t achieve outstanding results. Adhesion quality works adequately with sealant bonding to concrete surfaces reasonably well for standard crack filling applications. The bond proves sufficient for typical residential repair work without exceptional strength. Flexibility appears acceptable with cured sealant maintaining some elasticity allowing minor concrete movement without immediate cracking. The flex capability works for normal expansion and contraction cycles. Application consistency proves workable with sealant that dispenses from tube without excessive difficulty and smooths reasonably well during tooling. The material handles adequately during application process. Curing time meets reasonable expectations with sealant setting within advertised timeframes and achieving usable hardness for protecting sealed cracks from weather exposure. Where this sealant loses stars includes performance that’s merely decent rather than exceptional, coverage rates that require more product than ideal, or durability questions for extreme weather exposure. For basic concrete crack sealing requiring functional repair without premium performance demands, this provides adequate results at reasonable Sika brand pricing. The gray color matches concrete reasonably well making repairs blend acceptably with existing surfaces for typical maintenance applications. For standard crack sealing on residential foundations or concrete surfaces, this delivers workable results when perfect repairs aren’t critical. Jay Fray verdict: Decent crack flex sealant providing adequate concrete sealing for basic repair applications. Functional Sika product that works without delivering exceptional performance!
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Reviewed in the United States on March 10, 2026 by Jay Fray
Size: Pack of 1
I really like this product. Perfect to seal an edge where concrete meets my house. Starts smoothing out quickly and dries with a nice sheen.
Reviewed in the United States on June 26, 2026 by j