Sikaflex 1a Kit - One Component, Flexible, Non Sag, Polyurethane Concrete and Masonry Sealant for Vertical and Horizontal Surfaces, Sikaflex 1a 10 oz (White, Pack of 12)

I’m giving a five star because the batch I received has a 8 month shelf life and the previous two batches also had a long shelf life, which seems to be rare when it comes to Sikaflex. Sikaflex 1a is the best stuff you can get. It works on everything.. Don’t use it on something you plan on taking apart later lol it’s permanent stuff. If you’ve never tried it, you must get some because every contractor and handyman should have this product in their arsenal. It works great on concrete, wood, roofs, and almost everything else.

Work great

It’s a great stuff, to seal all exterior work I’ll be buying them in the different colors depending on the application.

This is an excellent product. Clean up won’t happen with water so be prepared for that.

Amazing product. Timing worked out perfectly as we were having our house painted. Easy to use and and clean up.

This isn’t at all like typical window caulking, we used it on our Quonset hut that leaks badly, we used it in the seams and no more leaks!

Used this to caulk around my Window and this stuff is hardcore works great for roof as well!

While this stuff is great when new, this batch has obviously been sitting for a long time, and is really thick.Using a regular caulking gun, you REALLY have to squeeze, to the point where your hand hurts after about 8" of bead, even with a large hole in the applicator and sealing "foil" in the tube.