Sikaflex-221 Multi-Purpose Polyurethane Sealant/Adhesive, 10.1 fl oz, White – Fast-Curing, Permanent Elastic Bond, Weather-Resistant, Sandable & Paintable

I used Sikaflex to adhere a roof wing to the back windshield of my car, and I’m seriously impressed with how well it worked. The bond is incredibly strong and feels permanent once cured. I let it set for about 24 hours before driving, and even after months of highway speeds and temperature changes, the wing hasn’t budged at all. The application was pretty straightforward, it has a thick, tacky consistency that gives you enough working time to position everything correctly before it starts to set. I’d recommend taping or clamping the part in place while it cures, because it does take a while to fully harden. Once cured, it’s flexible enough to handle vibration and movement, which is great for automotive use. One thing to note: this stuff is messy. It’s sticky, and once it gets on your hands or paint, it’s not easy to remove. Wear gloves, mask off surrounding areas, and have some cleaner or mineral spirits ready. Overall, Sikaflex delivered exactly what I needed, a strong, weatherproof, and vibration resistant bond that’s holding my roof wing securely in place. It’s not the cheapest adhesive, but it’s worth it for the strength and reliability.

Before I retired, my company was excellent at ceiling water leaks. Sika was the best product in areas exposed to ultraviolet light. I recently used it when installing a new skylight on my RV. Knowing that it’s difficult to clean up, I blue taped all edges and had rags with solvent nearby. The job went very smoothly, I was impressed how easily it adhered and spread evenly. Cleanup turned out to be no problem for me.

Sikaflex 221 was easy to work with and performed well in my project. It adhered strongly, cured into a solid bond, and left a clean finish. So far, it has held up well and given me confidence in the result, sealing even with heavy rains.

This stuff is phenomenal and a Saving Grace it cures very hard but yet subtle

Excellent caulking

Great sealant for my box truck build, strong but flexible

This sealant worked perfect on my Toyota Tacoma to fill the bed-line gaps. It is crack resistant I bought extra in case I ran out during the project but was able to get my money worth during the project. Dried quickly and looks like a factory finish.

This stuff works great for car windows. Make sure it’s not too cold because I did get a pinhole in one of my windows after I was struggling to get a perfect bead because it was so hard to squeeze the tube. Next time I will soak the tube in warm water for 20 minutes before starting to use it.(actually i will sous vide it to get it to the perfect temp and make sure I’m not overheating it)

Trabaja bien. Sella correctamente. Solamente noté que fue sencillo de quitarlo después de varios meses en unas piezas revestidas de pintura esmalte

Very good

Buen sellador excelente para celular y buena. Marca

Great brand always works

Good quality