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Sika Sikaflex-221 is a premium gray polyurethane sealant/adhesive in a 10.1 fl. oz cartridge, designed for fast curing and high elasticity. It bonds strongly to a wide range of materials including wood, metals, ceramics, and plastics, while offering weather resistance and low VOC emissions. NSF approved for incidental food contact, it’s ideal for professional-grade sealing and bonding applications across construction, automotive, and home improvement projects.
| ASIN | B01GDN4AAI |
| Best Sellers Rank | #2,018 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #48 in Silicone Sealers |
| Brand Name | SIKA |
| Color | Aluminum Gray |
| Customer Reviews | 4.5 4.5 out of 5 stars (282) |
| Full Cure Time | 5-7 Days |
| Included Components | Sealant |
| Initial Hardening Time | 2 Hours |
| Item Form | Liquid |
| Item Type Name | Sealant |
| Item Weight | 350 Grams |
| Liquid Volume | 10.3 Fluid Ounces |
| Manufacturer | Sika |
| Material Type | Polyurethane |
| Maximum Gap Fill | 1 Inches |
| Surface Recommendation | Tile, Counter Top, Window, Door, Sink, Tub, Gutter |
| Temperature Range | 40-100 Degrees Fahrenheit |
| UPC | 033886005104 |
| Unit Count | 10.1 Milliliters |
| Water Resistance Level | Water Resistant |
A**R
As advertised
Good quality
A**M
This stuff is phenomenal and a Saving Grace it cures very hard but yet subtle
J**N
Product works great on my RV, but this last tube I purchased had an “expiration” date that’s picky 3 months from the time of delivery. I’m not sure what happens after it expires, but why would Amazon send something like this so close to the expiration date? I keep a tube with me for RV repairs.
X**D
Great sealant for my box truck build, strong but flexible
P**H
I used this to attach my solar panels to the fiberglass roof of my van. Being a hero i also put one 1/2 inch screw in each. I let it sit overnight and didn't leave town for three days. They haven't moved a millimeter
A**R
Bought the grey for my RV which sits out year round, lots of exposure to Denver sun and weather as well as traveling vibration and movement. After using ChatGPT, it recommended this sealant, from other brands... can I trust an AI, we will see. First the product is very hard to squeeze from the caulk tube, (as mentioned from other users.) Second, I used painters tape to control the application in a straight line. The product is super messy, very tacky and requires to be spread, and smoothed ONLY ONCE. Three, Removing the tape was problematic, meaning the excess would string from the tape, then sometimes depending on the thickness, it overlapped backwards onto the newly applied sealant. I've worked with other products which have lost their effectiveness in a year, so another investment in this sealant is still out for a review a year from now. For as much as I think this might be the best alternative, the finished appearance suffers from previous applications of other products. Something I didn't purchase was the Sika Cleaner 226 or Aktivator-205 for Gel Coat finish... I did use the Isopropyl alcohol for clean up prior to application (which worked good) as well as after on my hands. Last, Chat said to not move the vehicle for 24 hours and product cures in 5-7 days .Also noted its cured by moisture in the air, how much? Denver is dry, but other western states are dryer.
Trustpilot
3 weeks ago
1 month ago