SIKA Sikaflex Self-Leveling Sealant, Gray Polyurethane, Fast Curing, for Concrete Expansion Joints, Waterproof, Paintable, Fills Cracks up to 1.5 in., 10.1 fl. oz Cartridge

If you’re looking for a sealant that combines ease of use with long-lasting performance, look no further than Sika Sikaflex Self-Leveling Sealant. This product has transformed my concrete surfaces, providing a clean, durable, and professional finish with minimal effort.Why I Love It:• Self-Leveling Magic: The true beauty of this sealant lies in its self-leveling properties. Once applied, it flows smoothly into joints, creating a flat, even surface without the need for tooling. This feature is particularly beneficial for those new to sealant applications, as it reduces the chances of uneven lines or missed spots.• Durability That Lasts: After curing, the sealant remains permanently elastic, effectively bridging gaps up to 1.5 inches wide. It’s designed to withstand the rigors of daily traffic, weather fluctuations, and the wear and tear typical of high-traffic areas like driveways and garage floors.• Quick and Easy Application: The product is a one-component polyurethane sealant, meaning no mixing is required. It’s available in both 10.1 fl. oz. and 29 fl. oz. cartridges, catering to various project sizes. The application process is straightforward—just clean the joint, apply the sealant, and let it level itself.• Paintable and Weather-Resistant: Once cured, the sealant is paintable with water-based, oil-based, or rubber-based paints, allowing it to blend seamlessly with your existing surfaces. It’s also waterproof and resistant to aging and weathering, ensuring long-term performance.Tips for Best Results:• Surface Preparation: Ensure that the joint surfaces are clean, dry, and free from oil, grease, or any other contaminants. This will promote optimal adhesion and longevity of the sealant.• Use Backer Rods: For deep joints, consider using a backer rod to control the depth of the sealant and prevent excessive use.• Curing Time: Allow the sealant to cure for 3 to 5 days for full strength. During this period, avoid any traffic or disturbance to ensure the best results.

I had a wooden expansion joint that rotted out. I cleaned out the expansion joint and put in exterior foam, leaving about 1/2 inch for the self leveling sealant. I have a slight slope away from the house and just jammed some cardboard in the joint in a couple of spots until the sealant started setting up and then pulled out the cardboard and added a little more material. Don’t have more than a half inch (depth) space to fill, you’ll just waste material. It levels nicely but you have to manage any slope. It won’t stay put, it will run. It dries like flexible rubber. I used a 29oz tube and another half tube to do 18 feet by 1” wide by 1/2 “ deep.

That amazon does not this item without damage. The product is good, i think... i wont know for a couple of years so all i know is that it is easy to use.and definitely looks better than the crack. But amazon doesnt protect the spout of this product from damage, and half of those i have ordered arrive with broken and bent spouts. The box the cartridge is shipped in is too big and the cartridge is allowed to shift and break its spout... which has a weaker support than 10oz cartridges

I bought this to seal up the expansion cuts in the garage concrete. I noticed a while ago that the expansion cuts had done their job and there were cracks in the bottom of each cut, probably going down through the whole slab. I've got some radon issues here so i wanted to get something I could apply that would drip down and flow well enough to get a reasonably air tight seal in the cracks.I had to use quite a lot of the sealant but it did flow from the top of the cuts down to the bottom (the cut was too narrow to get even the smallest part of the tip inside it). The cracks are narrow enough that it didn't flow down the crack itself. I would not bet on that always working because this stuff is very runny and can easily flow down a crack. Fortunately the cracks at the bottom of my expansion joints are very small.It cleans up well off the sealed concrete in my garage. I'd hate to think about cleaning this off rough outside concrete. It's definitely not cheap but it's the kind of thing I want to only have to do once so a quality polyurethane seems like a good choice given that I may eventually paint the garage floor. For outdoor applications, where there's no chance I'll paint it, I may opt for silicone based because it resists UV better.

Why did you pick this product vs others?:Great for horizontal crack. I used 3/8 diamond crack chaser on the grinder and then used 3/8 for one crack and 1 inch for another large crack. This self leveling worked good. I put a block of wood at the end of the crack by the grass so it wouldn't all leak out. Sealed well.

I LOVE this product. It’s so easy to use and does exactly as it claims. You just have to be sure you prep the surface correctly: I watched several YouTube videos on that first. It’s holding up perfectly after three years and lots of vehicle traffic.

Used at gas stations to seal up concrete joints, resists gasoline.

Filled the saw cuts in my new driveway quite well. It filled about 25 feet of saw cut per tube.