

🔧 Seal Smart, Last Long – The Ultimate Flex for Your Joints!
SIKA Sikaflex-1a is a premium white polyurethane sealant designed for small joints up to 0.5 inches. It offers superior weather and age resistance with high elasticity to handle ±35% joint movement. Certified to ASTM and NSF standards, it cures quickly (tack-free in 3 hours) and is ideal for windows, door frames, and concrete surfaces, delivering durable, waterproof sealing for both interior and exterior applications.










| ASIN | B00461KMIY |
| Best Sellers Rank | #14,619 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Polyurethane Adhesives #84 in Urethane Adhesives |
| Brand | SIKA |
| Brand Name | SIKA |
| Color | White |
| Customer Reviews | 4.4 out of 5 stars 680 Reviews |
| Full Cure Time | 5 Days |
| Included Components | Cartridge |
| Item Form | Fl |
| Item Type Name | Adhesive |
| Item Weight | 1 Pounds |
| Liquid Volume | 10.1 Fluid Ounces |
| Manufacturer | Sika USA |
| Material Type | Polyurethane |
| Maximum Gap Fill | 0.5 Inches |
| Surface Recommendation | Concrete |
| Tensile Strength | 175 Pounds Per Square Inch |
| UPC | 033886002752 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Waterproof |
J**D
Excellent for Superior Walls!
Excellent for sealing Superior Walls as they age. Worked perfectly!
J**B
Great stuff for Pool Decking
Great stuff. I used it to seal seam between the concrete deck and my pool tiles. Worked great. Not sure why they say it's self-leveling because it stayed in place on an overhead application. I used painters' tape on the vertical tiles to get a nice clean line.
2**B
Excellent product but incorrect description
I did not even attempt to use the Sikaflex until over a year after I purchased it, and then discovered that it expired one week after I bought it. So, it was over a year past expiration. But to my surprise, it was still in good condition! Very tough, strong adhesion, but Amazon’s description says it’s self-leveling, which it is not. I used it to bond shoe soles, seal leaks, and a tough caulking compound. A very good product that I will probably buy again.
M**.
Easy to install, good pliable use on my floor.
I used this product to fill the cracks on my garage floor. It works good. So far it has been standing up to daily wear and tear of the floor as normal. I am very happy 😊.
D**S
Made the hib easy
Perfect for the job..
R**6
Recommend
Reliable product. Ordered and shipped directly to job site. Arrived in time. Worked as expected.
K**K
Not self leveling!
Incorrect product description. After applying the product, I realized that it is not self leveling and had to be tooled and shaped which made a huge mess. Contacted customer service and the agent has not a clue what self leveling even means. She just wants to give me $5 for my troubles and issue a return. Why would Amazon make a customer return a used tube of sealant that is open? It will make a huge mess during shipping and will just end up in the landfill. Not to mention the hassle. Not the best way to keep costs down and customers happy Amazon. Fix the description so that people are buying the correct item in the first place. It’s like trying to get a customer to rip out wall paper and return it just for the sake of returning. That is not customer service, but again, most of the agents have zero common sense, they don’t know the products and just read the same script whether you’re returning an already applied sealant or a modem.
T**Y
Great for sealing cracks in concrete
I have had great results sealing narrow cracks in concrete with this product. I live where there are large temperature differences every day and this sealant has the elasticity and durability to last for several years after exposure to intense sun and numerous freeze-thaw cycles every year. It doesn’t match the color of the concrete but the durability of the repair is much better than the cement/mortar based products I’ve tried.
Trustpilot
1 day ago
1 week ago