

🛡️ Seal it, protect it, flex it — the ultimate liquid armor for your projects!
Flex Seal Liquid is a 16 oz black rubberized sealant designed for waterproofing and protecting surfaces. It offers a flexible, breathable, and UV resistant coating that prevents rust and corrosion. Ideal for diverse applications including roofs, basements, RVs, marine equipment, and masonry, it applies smoothly and dries quickly to form a durable, chemical-resistant barrier.












| ASIN | B019PFO4KM |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #70,783 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #185 in Hardware Sealers |
| Brand | Flex Seal Liquid |
| Color | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,163) |
| Date First Available | December 22, 2015 |
| Global Trade Identification Number | 00853517006283 |
| Included Components | 16oz Flex Seal Liquid |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Weight | 1 pounds |
| Item dimensions L x W x H | 4 x 3.4 x 3.4 inches |
| Item model number | LFSBLKR16 |
| Manufacturer | Swift Response, LLC |
| Material | Rubber |
| Number of Items | 1 |
| Part Number | LFSBLKR16 |
| Pattern | Rubber |
| Product Dimensions | 4 x 3.4 x 3.4 inches |
| Size | 16-oz |
| Style | Industrial |
| Surface Recommendation | Roof |
| UPC | 853517006283 |
| Unit Count | 16.0 Fluid Ounces |
| Warranty Description | 1 |
| Water Resistance Level | Waterproof |
T**G
Love this stuff!!
Love this stuff! Was able to use it to help seal various different parts on my 69 Dodge Dart Project. Has a nice glossy texture and dries pretty quickly. Helps protect my components in my car and keeps them from cracking. It is a good texture for most any projects. I have used it on other applications too. It's nice that it's a versatile project that I can use for almost anything!
T**Y
Best product ever for water proofing and sound dampening on car
This stuff is amazing. I actually used it on the floorboard of my vintage VW and under fender wells. Very durable product and good sound dampening, I used paint brush and paint on very thick. Worked great and basically put a solid layer of rubber on my car for good protection from elements.
J**N
Works great for bounce house!
Put this on the seals of my bounce house ! Works great to keep it together and prevent it from ripping ‘ very thick’s leak prevention! Even with water on still sticks throughout the summer and goo bc strong ! Water resistance great for the money !
R**L
Seals well
Used it on the inside of an old electric coke cooler. Works great and still lets it stay cool inside.
R**S
Great
Used this to seal the cracks in my driveway. Great product!
F**R
Worked great
This did what I expected. I have a 1976 Volkswagen Beetle convert. that I am fixing up. The rubber on the running boards was dried out and discolored, along with some splits in the rubber showing bare metal underneath. It was going to cost well over two hundred dollars each to replace them, so I thought I'd try Flex Seal. After cleaning and drying the running boards I applied the product with a small paintbrush. It went on easily,covered really well, and small "oops" we're easily wiped up with a cleaning cloth. I allowed a drying time of 24 hours and just now went out and filled in the split areas with a little more product and smoothed it out with the brush. It looks fantastic! I took a couple pictures which don't do it justice. It dried really shiny, and looks wet although it's dry and looks and feels like rubber. Some tips: I first stirred it very well because I could tell it was thick at the bottom of the can. It was easy to stir up though. When I was finished with the project yesterday, I replaced the can lid and tapped it on tightly. My brush I wanted to use again for today's touch up, so I sealed it in tin foil. When I opened the can again today it was ready to go but is tired it again anyway. There was no "skin" on top, and no lumps. My brush was only slightly stiff and I was able to use it again. I used about half a can of the product to do both running boards and am very pleased with how they look!
D**J
Dissatisfied harden up could not use
Harden up could not use
A**D
Ok
Works ok but if you lay a thin layer it will peel and come off easily
G**N
Not cheap but fixed hot tub liner brilliant stuff will definitely buy again and easy to use
M**N
Received a crumbled can
W**M
A very good product for sealing gutters and skylights. Paints on easily and seals all holes.
D**N
good product
J**F
Great stuff
Trustpilot
2 weeks ago
2 weeks ago