Model # 427706

Internet #203249445

Store SKU #652010

Sikaflex 10 fl. oz. Crack Sealant


10 fl. oz. Crack Sealant

  • Gradually self levels into crack for a flexible finish
  • Textured to blend with concrete surface
  • Permanently water immersible after cure
$7.48 /each

Frequently Bought Together

Product Overview

Sikaflex Crack Flex Sealant is a one part, polyurethane sealant for permanently repairing cracks in horizontal concrete surfaces. It can be used in cracks up to 1 in. wide and provides long term durability. Its elastic technology formulation allows the sealant to remain flexible and move with the crack.

California residents: see   Proposition 65 information

  • Gradually self levels in the crack
  • Water immersible after cure
  • Forms a permanent watertight seal
  • Textured for added density

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

can this be used to repair cracks in garage floors

Asked by: Wiggy
After reading the answers to my question I used it to repair a large crack in one of the garage floor slabs caused by settling. I cleaned the crack with a brush followed by vacuuming then filling it a little at at time adding more as the material settled into the crack but before it cured. It worked great and I actually used less than I thought I would based on prior comment by others.
Answered by: Wiggy
Date published: 2016-10-05

can you add another layer of sika pro self-leveling sealant on top of existing layer

did not get the correct depth on first layer
Asked by: nopro
I did. Seemed to be OK.
Answered by: Jason
Date published: 2016-10-25

What is the TOTAL curing time for this product? I did see where it said 2 hour dry time but dry to the touch is not total cure time.

Asked by: BTWOA
I waited 18 hours to drive on it and it seemed to work well.
Answered by: Jason
Date published: 2016-10-25

Can sikaflex be used to fill cracks in blacktop. Don't care that it is grey only. Used this on my concrete around my

Pool. It is a fantastic product.
Asked by: DaBink
Hello and thank you for your question. Asphalt has oils which release over time. These oils are bond breakers for polyurethane sealants. Sika does not recommend applying on asphalt for that reason.
Answered by: Sika Retail Rep
Date published: 2016-09-10
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Customer Reviews

10 fl. oz. Crack Sealant is rated 4.6 out of 5 by 25.
Rated 5 out of 5 by from Product went on really easily. Seems to be very durable. Time will tell as to how well it will ho... Product went on really easily. Seems to be very durable. Time will tell as to how well it will hold up against the brutal summer sun and heat of the south. It's fairly runny, so you should definitely use backer rod if you have a fairly big hole to fill.
Date published: 2016-10-25
Rated 5 out of 5 by from Not cheap, but the best! Follow directions. This is a professional product. Easy to use and apply. It is for horizontal cracks only, don't expect it to work on slopes or verticals. Start slow and go over as you need. Adheres great and lasts. This is not typical caulk!
Date published: 2016-10-02
Rated 5 out of 5 by from Great Product Preparation of the crack was the hard part. This sealant is somewhat self leveling. A putty knife is required. You will want to check it as it sets up as it does flow into the crack and you may need to add more sealant and smooth with the putty knife again. It was slower curing than I expected. This was done in my son's house in Phoenix, AZ where it is dry, so I expected it to cure faster. Not drying so fast may be good if it is a long crack as it gives you time to work with it smooth it out. The crack had variations in width to be fair to the product. I had very satisfactory results. Home Depot sells a pair of Gorilla gloves, that worked well in protecting my hands and survived to protect another day. I cleaned the putty knife with a wet paper towel. Cut the very tip of the tube as it will give you more control of the sealant.
Date published: 2016-05-31
Rated 5 out of 5 by from Best In Class - Have Used Sika for 5 Years I've been using this product for over 5 years to seal driveway cracks and it dispenses and holds up much better than 2 similar products I have tried. The competing products are harder to pump out of their cartridges (which is important if you are using a lot of tubes) and they do not have the flexibility and long-term elasticity of the Sika sealant. Be sure when you use this that you first fill the crack with a pre-filler (my favorite is limestone base because it compacts) else you'll waste the sealant down the crevice of the crack, which is expensive. Also, if you live in a cold climate, never let the sealant fill above the level of the concrete, else your snow shoveling equipment will snag it and pull it out.
Date published: 2013-06-04
Rated 5 out of 5 by from concrete crack/joint caulk This stuff works to seal the gaps which allow water into your slab joints. Which freezes and buckles and cracks the concrete slab. If the crack is deep you'll need to put filler into the crack first. HD has special closed cell foam strips made for this in several sizes which cut with scissors easily to stuff into those cracks so you only fill an area about 1/2x1" to conserve the sealer. I use a wood paint stirrer stick to stuff the crack. This stuff stays runny(self-leveling)for several hours. It will keep disapearing down that gap unless its partially filled first. It may take a couple of days to cure to its tough rubbery texture. You must cover it up with something to avoid walking on or driving over during full cure. I found that wide painters tape worked for me. This is difficult to get off your hands and everything it touches. Be neat and careful, wear gloves. Suitable solvents are pretty harsh on skin like xylene, acetone, fingernail polish remover, etc. Soap and water doesn't do to much. Once cured this stuff is stuck to whatever it's on about as tough as tire rubber. It's elastic and will move with the crack to a limited extent. I had an area of several inches let loose on one side. I cut out as much as I could with a box cutter and filled it back up with the Sikaflex. A very effective product which works. Comes in small 10.1oz caulk tubes and mega 29oz tubes.
Date published: 2013-04-29
Rated 4 out of 5 by from Not So Long-Term I use this product to fill the "not-so-hairline" cracks developing in my exposed aggregate driveway. The best feature is its 'self-leveling' attribute ... squeeze it not-too-carefully along the crack and don't mess with it. It 'levels' so well, you'll probably need to go back over the cracks in a day or two. Needs improvement areas: the 'sand' color is too bright for exposed aggregate; its 'plasticity' lasts only a few years after which the normal expansion and contraction on the aggregate will crack the seal and you'll need to reapply. But I haven't yet found a better product.
Date published: 2013-11-13
Rated 4 out of 5 by from fixed my crack I had a big nasty crack in my concrete driveway, I used this product to fill the gap. The directions say to just put it down on the crack with a caulking gun and let it sit. It is self leveling. After the fact I kind wish I would have used a putty knife on it to level it out. It kind has a little pump where the crack was. Look at my pictures and you can see what I am talking about. It seems durable though, and I don't expect it to fall off or anything. All I did for prep was sweep the cracked part of the driveway with a broom.
Date published: 2013-09-25
Rated 3 out of 5 by from OK but tedious with caulk gun This product performs as advertised. My only complaint is using a caulk gun can make this job slower than it should be job. I used it for expansion joints and it was difficult to do a professional looking job because of the nature of using a caulk gun (unless you use one regularly). I went though 2 tubes of this product before I stumbled across another brand that comes in a 32 oz plastic container. You squeeze it out like wood glue. I simply found the 32 oz container much easier and quicker. It also leveled out quicker than what came in the caulk tube. You may be perfectly fine with using a caulk gun, but I preferred the plastic container with the resealable cap.. It was also much cheaper.
Date published: 2014-03-30
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