Best Industrial Joint Sealants of 2026

"I've used this sealant for years on job sites and recently again for a home renovation project. The application is straightforward—just cut, pierce, and caulk—and it consistently delivers excellent results. This is my go-to product for reliable bonding, and I’ll keep buying it whenever I need high performance."

"As a DIY enthusiast, I was impressed by how quickly this caulk becomes water-ready—only 30 minutes! It’s tough, resists mold, and adheres strongly to surfaces like tile and glass. No cracking or yellowing even after months in my bathroom, and the finish stays bright white. The only minor downside is the strong odor during use, but it’s totally worth it for such quality results."

"This is a top-tier sealant that’s truly waterproof and durable. I used it for windows and doors, and the results gave me real peace of mind. It applies smoothly and cures into a flexible, long-lasting seal. The only slight drawback was the price online, but for the quality and convenience, it was a worthwhile investment."

"I used this spray foam to customize my Xbox controller, making it much more ergonomic and comfortable for my arthritis. The product expanded perfectly, acted as an adhesive, and was simple to apply with no leaks. Shipping was quick, packaging was solid, and I never needed customer support. I'd definitely recommend it to anyone looking for a creative solution, especially for those with hand pain."

"This product is great for sealing gaps and cracks—perfect for keeping mice out of my garage. Just be careful not to shape it before it's fully hardened, since it’s sticky. Once dry, it’s easy to trim and works exactly as intended."

"I ordered several cans to create a faux ooze effect for a Halloween prop, and it worked really well! The foam was easy to apply but quite sticky, so I made sure to work in an area where a mess wouldn’t matter. It dried quickly and has held up outdoors, even in the rain."

"I've found this foam to be fantastic for sealing drafts and keeping rodents out. It expands nicely and once it sets, it’s easy to trim to fit. Just make sure to wear gloves—it really sticks to your skin!"

"This is my go-to product for insulating and filling gaps. Once it cures, it’s flawless, but be careful: don’t get it on your hands or anything you want clean. I always use gloves, and I try to use up as much as possible in one go since it’s hard to reuse the can later."

"I was amazed at how well this foam eliminated cold air leaks in my room. The nozzle made it easy to get into tight spots, and after use, the temperature difference in my house dropped dramatically. It’s not a substitute for full insulation, but it’s a great temporary fix. Definitely wear gloves, though, as it can leak a bit during spraying."

"I was looking for Lamons Expanded Joint Sealant, but this product is definitely not the same. It doesn't match the GORE material quality I needed."

"The material is much stiffer compared to GORE, which made it difficult to use for my application."

"This sealant looks like a generic, white box brand—possibly a Chinese knockoff rather than the name brands I trust."

"I've wanted to try this edge sealant for a while, and after using it on my foundation’s stem walls and footings, I was impressed by its excellent adhesion and unexpected elasticity. It’s a great safeguard for foundation edges in case of cracks and does a solid job keeping water out. I’ll likely use more outside to help prevent bugs from getting in."

"This is an excellent product for filling concrete cracks. Works best on flat surfaces and, despite being a bit runny, it fills gaps perfectly. I ended up ordering more after my first batch ran out, and Amazon’s next-day delivery was a real bonus!"

"The sealant seems durable and flexible with solid sticking power. Just a heads-up, it’s a bit thick and not self-leveling, so you’ll want to scrape and smooth it out before it hardens for the best finish."

"I used this for sealing concrete joints on my driveway and sidewalks. With some painter's tape and backer rod, I managed to get a solid seal. I recommend letting it dry for a full day and removing tape before it's completely cured. I’m happy I bought in bulk because I ended up using all of it—definitely gives peace of mind against further erosion."

"This product is very runny, but it fills cracks well and offers a rubbery, flexible finish. Cleaning and prepping the concrete properly made a big difference. I learned to fill cracks fully to avoid the need for a second coat. So far, it’s doing exactly what I hoped, and I’m optimistic it will keep water out and prevent damage."

"I was pleasantly surprised by how easy this sealant was to work with. The self-leveling feature created a smooth, professional finish on my driveway joints, and it stayed flexible after curing. It’s become my go-to for concrete sealing jobs and works great with a backer rod."

"I used this to seal the floor in my 53ft trailer, and it was simple to apply and dried by the next day. It’s done a great job keeping everything dry inside. Really happy with how straightforward it was to use."

"The brown color looked just like chocolate icing, and I was really surprised at how smoothly it came out of the caulk gun—no hassle at all. Cleanup was easy as long as it wasn’t dry, and one tube was exactly enough for my bathroom sink. I’d definitely buy this again."

"I bought this to fix leaks in my sunroom and it’s been holding up through all kinds of weather. The color has stayed consistent too, which I appreciate."

"Having caulked thousands of feet over the years, I found this polyurethane sealant from Sika to be exactly what I needed: stretchy, paintable, and perfect for my window-to-drywall project. My local stores didn't carry it, so I ordered online and it arrived quickly. The application was easy, and a year later the results are still excellent."

"I used this sealant to fix leaks under my sliding door and to protect the bathroom door from moisture. Both jobs turned out fantastic, and I've had no more issues with spiders or water. The product's performance genuinely impressed me."

"I've tried many caulks over the years, but Sika's construction sealant stands out for its smooth application, longer working time, and easy clean-up compared to silicone. It flexes well, takes paint perfectly, and even after two years past the expiration date, the tubes worked like new."

"I've relied on this sealant for years and have found it to be the best solution for sealing threaded fittings. I always use it on commercial dish machine gaskets, and once applied, I never have to worry about leaks or constant retightening. The only drawback is that it's pretty tough to clean off your hands, so gloves are a must."

"After 25 years in golf course irrigation, I can say this is my top pick for pipe and fitting sealant. It works on iron, PVC, copper—pretty much everything I've tried. Just be careful: it stains anything it touches. If you don't want brown marks on your skin or clothes, handle with care."

"I turned to this product out of frustration with persistent leaks in my compressed air and gas lines. While it's effective at sealing gas pipes, it is extremely gooey and can make a mess. For connections that demand a hard-setting sealer, this isn't the answer, but for most standard applications, it performs just as well as the competition."