

🔧 Seal smart, seal strong—because your projects deserve premium protection!
Sikaflex 1A is a premium-grade, one-component polyurethane elastomeric sealant designed for high-performance sealing in construction. It offers excellent adhesion without primer, certified safety for potable water, and flexibility to handle ±35% joint movement. Its superior resistance to aging and weathering ensures durable, water-resistant seals across a variety of materials and applications.
| ASIN | B073HN8527 |
| Best Sellers Rank | #137,354 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #46 in Polyurethane Adhesives |
| Brand | Sikaflex |
| Color | Black |
| Date First Available | June 29, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 12 pounds |
| Item dimensions L x W x H | 14.33 x 9.65 x 6.69 inches |
| Item model number | SikaFlex |
| Manufacturer | SikaFlex |
| Material | Polyurethane |
| Number of Items | 12 |
| Product Dimensions | 14.33 x 9.65 x 6.69 inches |
| Surface Recommendation | Threshold Ramps and Landings |
| UPC | 033886002813 |
| Unit Count | 123.6 Fluid Ounces |
| Water Resistance Level | Water Resistant |
T**S
Excellent product
Best polyurethane caulk that you can buy. High-quality brand and a high-quality product. If you want to create flexible seals to hold out water, this is the stuff you need. Using it to seal 10mil poly to an old tile floor before we put new flooring over-top! Also used for waterproofing exterior door openings! 👍
K**S
Just what I needed
Very happy with my purchase, the shipping was quick and got what I ordered.
U**N
It doesn't get hard and brittle
I've used Sikaflex before to seal along different areas (house brick to driveway, expansion joints in patio cement) and it works well. As with any product that is coming out of a tube, it can be messy. I laid down duct tape as a guide and this made for a pretty good looking job. One final suggestion is to thoroughly clean (wire brush) the areas that the product is going to contact.
B**N
Black! Black!
The same product that you buy at your local building supply store just black. The caulk is truly black. Another great product from sika
C**Y
Good product
Product was open in the box
Trustpilot
3 weeks ago
1 month ago