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Flex Seal Liquid, 16 oz, Clear, Liquid Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry

4.4 4.4 out of 5 stars 4,240 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Hardware Sealers by Flex Seal Liquid

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16-oz

Purchase options and add-ons

Material Rubber
Brand Flex Seal Liquid
Style Protective
Item Weight 16 Ounces
Item Dimensions LxWxH 3.38 x 3.38 x 4 inches

About this item

  • Flex Seal Liquid is liquid rubber in a can! Now you can brush, roll, dip or pour it on!
  • Use anywhere you need a watertight, flexible rubberized coating
  • Goes on smooth and covers fast, sealing out water, air and moisture
  • UV Resistant
  • Prevents rust and corrosion. Chemical resistant

Additional Details

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 3.38 x 3.38 x 4 inches; 1 Pounds
  • Item model number ‏ : ‎ FLEX SEAL - LFSCLRR16
  • Department ‏ : ‎ Unisex-Adult
  • Date First Available ‏ : ‎ December 22, 2015
  • Manufacturer ‏ : ‎ Swift Response, LLC
  • ASIN ‏ : ‎ B019PFO4MA
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.4 4.4 out of 5 stars 4,240 ratings

Important information

Ingredients

Contains: Butan-2-One 0, 0', 0'-(Methylsilylidyne) Trioxime, Aminopropyltriethoxysilane, VOC Content: Sealant or Caulking Compound 55 g/L (0.46 Lb/Gal).


Product Description

Flex Seal Liquid - It's Liquid Rubber in a Can!
Group picture of various sizes and colors of Flex Seal Liquid

FLEX SEAL LIQUID is thick rubberized liquid that you can brush, roll, dip or pour to form a durable, watertight flexible barrier. Seals out air, water and moisture. Chemical and UV resistant. Available in black, white, clear and gray.

Advantages of Flex Seal Liquid.
Picture of product being rolled onto metal roof.
Brush Roll Dip Pour

What's in the box

  • Flex Seal Liquid Rubber in a Can, 16-oz, Clear
  • Product guides and documents

    Looking for specific info?

    Customer reviews

    4.4 out of 5 stars
    4.4 out of 5
    4,240 global ratings

    Customers say

    Customers like the quality, ease of use, and seal of the sealant. For example, they mention it works well, it's easy to apply, and it sets up relatively fast. That said, they're satisfied with the waterproofness. That being said, opinions are mixed on leakage, value, thickness, and drying time.

    AI-generated from the text of customer reviews

    268 customers mention216 positive52 negative

    Customers like the quality of the sealant. They mention that it works well, is easy to work with, and has no negative problems. Some say that it's amazing and goes a long way. Overall, most are satisfied with the product's quality and performance.

    "I was trying to repair a leaking bird bath that I love. This worked great.I applied 2 coats just to be sure...." Read more

    "...A month in and it is working great for the my application" Read more

    "...Sealed the 8" crack perfectly! My antique birdbath is fully operational!" Read more

    "...Time will tell if it works. So far so good. No negative problems." Read more

    65 customers mention50 positive15 negative

    Customers find the sealant easy to apply and work with. They say it rolled on easily, sets up relatively fast, and is easy to use with a brush.

    "...It does smell like rubber cement glue,but not overwhelming,and dissipates quickly." Read more

    "This is the second time I have purchased. Easy to use coverage is exact 18.75 square ft. I painted decking boards 60"x 5.5" will cover total of "8"...." Read more

    "Super easy to work with and no odor from the clear." Read more

    "It was much more thin and runny than I was hoping for so it was hard working with it. If it was a gel it would have been perfect...." Read more

    38 customers mention32 positive6 negative

    Customers like the sealant. For example, they say it does a good job sealing moisture and cracks. Some mention that it's amazing and can be used on water fountains, gutters, and wood posts. That said, some are happy with their purchase and recommend it to others.

    "...second can ... The best use I found for this stuff is to seal the top of exposed wood posts...." Read more

    "...By the way, my project was a success. Sealed the 8" crack perfectly! My antique birdbath is fully operational!" Read more

    "...recycling the water from the basin, for a week now, and the seal seems tight. I'm very pleased. I hope it lasts longer that the other product!" Read more

    "...The paint runs off. Other than that, it is an excellent sealant." Read more

    32 customers mention26 positive6 negative

    Customers like the waterproofness of the sealant. They say it's a good sealant that keeps water out. Some say it works pretty well at waterproofing metal and canvas. Overall, most are happy with the product's waterproofness.

    "Fun fact: you can use this stuff to weather proof outdoor furniture. I used it to weatherproof a pool table. It goes on smooth and stays shiny...." Read more

    "This thing seals even on wet surfaces. Leaky shower no problems it sealed it." Read more

    "keeps water out" Read more

    "...It's also exxcellent at adhering to surfaces. It should be pretty waterproof, although I've never tried it for that myself." Read more

    103 customers mention60 positive43 negative

    Customers are mixed about the leakage of the sealant. Some mention that it stops the leaks, seals up good, and works great at sealing the gaps outside their chicken coop, while others say that it leaks outdoor fountain, windshield was leaking rain all over the inside of their SUV, and that it drips some.

    "...A week later it rained for three days. NO LEAK!" Read more

    "...I prefer the cans over the spray, as I do think the spray seems watered down. It comes in clear, black and white." Read more

    "Seals up good. may need to block up bigger gaps with a wedge or some filler, then paint over, but very happy with results." Read more

    "...A few days later I test flooded the deck and not a drop of leakage below. In the attached photo note how the water beads up...." Read more

    54 customers mention19 positive35 negative

    Customers are mixed about the value of the sealant. Some mention it's an excellent product for the money, it saves them a ton of money, and is easy to use. However, others say that it'll not worth the high cost over other, better made sealants.

    "...think of a lot of uses for this product, too bad it's rather expensive for the volume...." Read more

    "...Time and money a huge money saver! Hope this helps." Read more

    "...started to congeal pretty quickly, which left an uneven and unsightly finished product and also made it difficult to spread out over the whole..." Read more

    "...I’m super impressed, but it’s still overpriced." Read more

    29 customers mention12 positive17 negative

    Customers are mixed about the thickness of the sealant. Some mention that it's so thick that it forms a thick-thin coating, while others say that it was hard to work with, it goes on very thick, and you can't thin it.

    "...The foam becomes heavy and comes off the stick. Creating a huge mess...." Read more

    "...It is fairly thick so I was glad that I bought a disposable foam brush to spread it with...." Read more

    "It was much more thin and runny than I was hoping for so it was hard working with it. If it was a gel it would have been perfect...." Read more

    "...2 coats, it's thick & feels like silicone. small debris does stick to it, so just know that...." Read more

    25 customers mention9 positive16 negative

    Customers are mixed about the drying time of the sealant. Some mention that it dries quickly, while others say that it takes quite a long time to dry. Some say that the seal liquid is clear and drys like liquid silicone, while other say that they didn't like that it was a bit runny and that it took quite l long time.

    "...It goes on smooth and stays shiny. It does take several days to dry. Nit sure about the durability on something like that though." Read more

    "...It does smell like rubber cement glue,but not overwhelming,and dissipates quickly." Read more

    "...If it was a gel it would have been perfect. Took forever to dry too. I'll try it on other projects but I'm not thrilled so far." Read more

    "...It did take a rather long time to dry though, especially where it was on pretty thick...." Read more

    So far, so good
    5 Stars
    So far, so good
    Seems to be a good product depending on the scope of the repair required. For large areas or deep holes it may not be the right solution. Chances are if your project needs more than the 32 oz can, than you may need to consider a different fix.In my case it was to seal a masonry joint running the length of my outdoor deck where the floor of the cement deck meets a stucco raised curb. I was getting water leakage into the room below, even from light rains. The application was easy. The look and texture seems similar to rubber cement. I used the clear and it dried nice and thin with just a little sheen. Hardly noticeable on the painted deck. I also applied it inside the drain scuppers and on the deck rail flanges for good measure.A few days later I test flooded the deck and not a drop of leakage below. In the attached photo note how the water beads up. This was a cheap and easy fix to a big problem so I’m a fan. Not sure how long it will last, but even if I have to apply it seasonally, it will be worth it
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    Top reviews from the United States

    Reviewed in the United States on March 17, 2024
    Reviewed in the United States on November 18, 2019
    Customer image
    5.0 out of 5 stars Great Product! Great Value! Product performs as advertised!
    Reviewed in the United States on November 18, 2019
    This is the second time I have purchased. Easy to use coverage is exact 18.75 square ft. I painted decking boards 60"x 5.5" will cover total of "8". I recommend using a brush that can be thrown away. I used a 2" all purpose polyester brush $2.99. Depending on how long project takes you might need a spare brush the paint does stiffen quickly. Cannot leave brush to come back later. Do project within an hour. If not brush will not be flexible or pliable. ( have a spare brush). I have cleaned a brush but it was very difficult to get all of the the product out of brush. The foam disposable brushes DO NOT WORK WELL! To do one quarter of a board resulted in using 2 foam brushes leaving a third heavy and crumbled. The foam becomes heavy and comes off the stick. Creating a huge mess. I have also used a small portion of can and if you make sure rim is clean clear of paint and put lid on with a hammer to assure it is closed I have gone back 6 months later and paint was useable not hard no problems ease of use as if just purchased. I've used before I actually used wrong wood and after 4 months the previous wood that I painted was great no mold no rotting. The product held up well exactly as advertised. I have applied and temp dropped to 45 degrees no problem. The picture shows proper wood. Painting front and back to avoid replacing wood again. The value of not having to replace wood especially when it will be touching ground on my ramp. Time and money a huge money saver! Hope this helps.
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    41 people found this helpful
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    Reviewed in the United States on June 10, 2023
    3 people found this helpful
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    Reviewed in the United States on July 21, 2023
    Customer image
    5.0 out of 5 stars Great stuff
    Reviewed in the United States on July 21, 2023
    Fun fact: you can use this stuff to weather proof outdoor furniture. I used it to weatherproof a pool table. It goes on smooth and stays shiny. It does take several days to dry. Nit sure about the durability on something like that though.
    Images in this review
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    Customer imageCustomer image
    2 people found this helpful
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    Reviewed in the United States on January 29, 2024
    4 people found this helpful
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    Reviewed in the United States on February 4, 2024
    Reviewed in the United States on February 26, 2024
    One person found this helpful
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    Reviewed in the United States on March 8, 2024

    Top reviews from other countries

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    Rafael
    3.0 out of 5 stars não aguentou granizo
    Reviewed in Brazil on August 24, 2023
    Arthur Dalmolin Dahmer
    3.0 out of 5 stars Bom, porém a entrega é ruim
    Reviewed in Brazil on December 15, 2022
    Alfredo Gonzalez
    5.0 out of 5 stars Excelente
    Reviewed in Mexico on November 23, 2022
    owen welsh
    5.0 out of 5 stars no leaks very happy.
    Reviewed in Canada on December 4, 2017
    One person found this helpful
    Report
    Sabrina B.
    5.0 out of 5 stars Five Stars
    Reviewed in Canada on June 13, 2017