Best Hardware Sealers of 2026

"I’ve tried several concrete fillers before, but this one truly impressed me. It applies smoothly, adheres firmly, and actually looks like concrete. After using it, I won’t go back to any other product. This is now my go-to filler for all my repairs!"

"When I used this sealant on my driveway and basement foundation, I noticed the thick consistency made it simple to apply and it blended in well with the existing concrete. The waterproof finish has kept moisture out and maintained the area’s appearance, so I’m very satisfied with the results."

"I needed something to seal the gaps around my home’s foundation and was pleased with how quickly this dried and how easy it was to use. It’s helped prevent both insect and water issues, which gives me peace of mind."

"I tried this on my outdoor storage box and was impressed—water now beads right off the wood. Just a heads up: you’ll want to apply it outside or in a well-ventilated spot because the smell is pretty intense. Even with a mask, I still noticed the fumes when checking the box later."

"After testing many brands, Flex Seal is the clear winner for me. I was skeptical at first, but it really holds up outdoors. I did need multiple coats and some patience for curing, but after three days, the result was tough and UV resistant. The color blended nicely, and although there’s a little fading over time, it’s nothing out of the ordinary."

"I needed something to seal the joints in my gutters and this did the job perfectly. Coverage was easy and thorough—now my garage stays dry with no leaks. I was really impressed with the material’s quality. It actually works as advertised!"

"I've tried this sealer on everything from painted rocks to polymer clay and wood projects, and it never disappoints. The gloss isn't too shiny, just enough to look professional. Application is a breeze—just shake well and use light coats. It dries clear and fast, and I love that it doesn't yellow my artwork over time."

"I use Aleene’s Spray Gloss Finish to seal my painted porcelain ornaments and small crafts. It gives a beautiful shine and a sturdy protective layer. Multiple light coats work best, and it's straightforward to use. I appreciate how even the finish looks."

"I compared Aleene’s to Krylon for sealing vinyl stickers. Aleene’s is much easier on thinner vinyl—no curling or uneven pooling. It goes on evenly and gives a slightly textured, semi-gloss look. While it’s not as slick-smooth as Krylon, it’s perfect if you want a fine mist texture and easy application."

"I discovered this product while trying to insulate the draft around an indoor water pipe. It was sticky enough to seal out cold air yet simple to work with. I highly recommend it for anyone needing to block drafts."

"After watching a YouTube recommendation, I decided to try this sealant for my outdoor projects. I've used it in several situations and it's become my go-to solution. The application is clean and it's held up well outside."

"When I installed a humidifier on my furnace, I needed something reliable to seal around it. This product was easy to mold by hand, stayed in place, and didn’t leave much residue or odor. Cleanup was a breeze and I'm very satisfied with the result."

"I've used this on both new and older marble counters and it really made the older one look almost like new. Application is simple: spray, smooth out, let it sit, and wipe off. Repels water well and I haven't seen any more damage since using it. Planning to reapply every six months."

"This product did a fantastic job sealing my previously unsealed countertops. It definitely restored the shine and made cleaning easier, even with two young children in the house. No strong scent and super easy to use—I'm very happy with this brand overall."

"I followed the instructions carefully, but after drying, my counters had foggy spots. I tried cleaning and reapplying, but the fogginess remained. Buffing helped a bit, but I'm not sure if I should try again or just stop."

"I applied Miracle Sealants 511 Impregnator to my tile project and found the application simple and cleanup quick. The sealant really repels water and makes it much harder for dirt or stains to stick to my grout. While there was a minor shift in my grout color, the overall protection and peace of mind it provides easily outweighs that. I'd recommend it for anyone seeking an effective, easy sealer."

"After using this sealer on my outdoor limestone blocks three years ago, I am amazed that there's been no mold or fungus growth at all. The blocks have stayed bright white and the finish looks just as good as when I applied it. Highly recommend this product for long-term outdoor protection."

"I had issues with water soaking into grout in my bathroom, even after trying other sealers. Miracle 511 solved the problem—after applying two coats, water just beads up and runs off. The results are impressive and I feel the slightly higher price is worth the quality. I’d definitely recommend it to anyone needing reliable grout sealing."

"I've tried several granite care brands, but I always return to this one. The three-step system is straightforward and leaves my granite looking great. Application is easy, dries fast, and the finish brings out the color. It may cost a bit more, but the results make it worthwhile."

"I applied this to my kitchen countertops and was impressed. It dries quickly, gives a nice shine, and keeps the surface protected. Cleaning is much more convenient now. Definitely a go-to product for regular upkeep."

"I used this on my slate patio table and was really happy with the results. The application was simple, and my table looks rejuvenated. Cleaning up is much easier now. Highly recommend for restoring surfaces."

"From the very first use, I could tell this sealant was made with quality and ease of use in mind. The application is smooth and straightforward, and it creates a watertight, durable seal that stands up to moisture, temperature changes, and even the outdoors. I especially appreciate the clear, professional finish—it blends well and looks great on any surface. This is now my go-to for any sealing project!"

"I tried Gorilla Waterproof Caulk & Seal for sealing my kitchen sink and bathroom, and I was genuinely impressed by how easy it was to apply and how well it adhered. The clear finish looks fantastic and the seal has remained strong and waterproof even after weeks of daily use. The fact that it's mold and mildew resistant is a huge plus. There’s a bit of a smell at first, but it fades quickly. I’ll definitely keep this on hand for future repairs."

"The squeeze tube is super convenient for small jobs, and I love that the caulk applies smoothly and dries to a clean, professional look. It’s reliable and durable, just like every other Gorilla product I’ve used. This sealant really delivers great results every time!"

"I found this product incredibly easy to use, and it did a great job filling in gaps and cracks around my front door. After application, it was barely noticeable and I’m planning to paint over it soon for a seamless finish. I’m repurchasing, mostly because a bit dried out when my son left the can open."

"After years of dealing with a leaky door threshold, I used this and was amazed at how simple it was to apply. The product sealed perfectly and I’ll definitely use it for any similar repairs in the future. Just keep in mind, you might need more than one can for bigger projects."

"I tried this paste on a fiberglass fountain with large cracks and it worked flawlessly. The thick, adhesive formula made patching easy, and it has remained water resistant even while submerged. The container is small, but it was sufficient for my project."