🔧 Seal it like a pro — fast, strong, and weatherproof!
Sika Sikaflex-221 is a fast-curing, highly elastic polyurethane sealant designed for permanent, high-strength bonding and sealing across multiple surfaces including wood, metal, and glass. NSF approved for incidental food contact, it offers weather resistance, low VOC emissions, and can be sanded and painted for a flawless finish.
| Color | Aluminum Gray |
| Brand | SIKA |
| Item Weight | 350 Grams |
| Liquid Volume | 10.3 Fluid Ounces |
| Item Form | Liquid |
| Maximum Gap Fill | 1 Inches |
| Surface Recommendation | Metal, Wood, Glass |
| Temperature Range | 40-100 Degrees Fahrenheit |
| Water Resistance Level | Water Resistant |
| Number of Items | 1 |
| Manufacturer | Sika |
| UPC | 033886005104 |
| Unit Count | 10.1 Fl Oz |
| Material | Polyurethane |
| Model | Sikaflex 221 |
| Item Weight | 12.3 ounces |
| Product Dimensions | 12 x 2 x 12 inches |
| Country of Origin | USA |
| Item model number | SIKA-90892 |
| Manufacturer Part Number | 90892 |
| Special Features | Stain resistant |
R**.
This product works
This stuff really works. My wife purchased a vintage camper that was leaking from the marker lights and front window. Let's just say, NOT ANYMORE!! This sealant works GREAT!! Definitely recommend this product for any sealant needs. 👍🏻👍🏻
M**R
This is great stuff - Apply with care
I used this to reseal the inner framing of a cargo van to the shell where the original manufacture bonding broke away. I left the original foam looking bonding in place. It was still firmly attached to the framing. The Sikaflex bonded to both the original foam and the the steel van shell. It helped reduce some of the vibration and noise. I allowed 6-7 days cure time. BE CAREFUL TO GET AS LITTLE ON YOU HANDS AS POSSIBLE. Clean it off your skin as soon a possible. Even after half an hour or so it is hard to remove and remain on your hands for a week or so.This a high quality strong elastic sealer adhesive. Once dry and cured its strong. Relatively low odor. Highly recommend.
A**3
Great Product!
Super good quality sealant product!
T**H
Works well.
Needed for rv windshield leak.Worked well.Time will tell for long term effectiveness.
S**Y
ITS LOCKS ON AND WONT LET GO
THIS STUFF IS NO JOKE.WHEN IT GRIPS ONTO STEEL ITS GRIP IS ONLY SURPASSED BY CHUCK NORRIS.THE ADHESION AFTER 24 HOURS IS NOT TO BE REMOVED.ITS MORE SECURE THAN MOST MARRIAGES AND DEFINITELY MORE STABLE THAN 90% OF WOMEN.
J**L
Great product for restoring my old camper
Applies nicely with no sag. I used it for all of my penetrations for various camper component replacements (microwave vent, windows, etc.). I did not use this on the roof though, I used Dicor.
J**M
Hard to Dispense and Messy !!
First thing I absolutely hated about this product is that it is nearly impossible to dispense it from a caulking gun without using both hands to squeeze the trigger. This makes for a messy job no matter how hard you tried not to. DO NOT get this stuff on your skin or clothing. I ruined my shirt but it was a work shirt anyway. Stains your hands black and is nearly impossible to get off even after 4 days of trying. Time will tell if it sealed up the RV window well or not.Do yourself a favor and buy something easier to use. A 10 to 15 minute job ended up taking and hour and a half to finish. Making the hole in the end of the caulk tube didn't help at all. I will not be a repeat buyer of this product.
T**D
Does a great job
Works perfectly, easy to use . Great adhesive.
Trustpilot
2 months ago
2 weeks ago
