14 oz, 2-Pack, Gray, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More

Works great on my basement exterior window sills. Easy to seal around the windows.

This stuff hardens like concrete. Should keep the rain off the porch and in the gutters like wanted. Coated both sides and the bottom of gutters.

Really on the fence with this product. Sounds remarkable in theory. I'll start by saying I have a 2001 tacoma 1st gen that has the typical leak under the dash. After hours of research I found the general area that I needed to address. Looked like two pieces of sheet metal pushed together with no water proofing. Instead of just relying on this product I also bought an automative polyurethane sealer that I used first. I knew it would be a messy fix and the flex seal was to help fill in the imperfections and more closely match the paint color as the sealant was black. My first issue with flex seal was, 1. it didn't spray straight so I had to do a test shot before actually using each time else it went the wrong direction and created a mess. 2. no matter if I went light coat or heavy coat, it still never seems to dry very well. I'm on day 6 and parts of it are still tacky. I live in a very humid area at 90+ % most summer days. I suspect that has a tremendous amount to do with it. But with commercials where they spray this on a leak and it seals nearly instantaneously, needless to say I'm disappointed that it's taking this long. I decided to try putting a fan on it and at this time that's been nearly 12 hours. I haven't checked today but crossed fingers.

Great at repairing leaks:)

As described but overpriced