Target New ArrivalsBack to SchoolCollegeClothing, Shoes & AccessoriesHome & DecorKitchen & DiningOutdoor Living & GardenGroceryHousehold EssentialsBabyBeautyPersonal CareSports & OutdoorsHealthWellnessSchool & Office SuppliesToys & GamesElectronics & TechVideo GamesMovies, Music & BooksParty SuppliesGift IdeasGift CardsPetsUlta Beauty at TargetShop by CommunityTarget OpticalDealsClearanceNew ArrivalsBack to SchoolCollegeTop DealsTarget Circle DealsWeekly AdShop Order PickupShop Same Day DeliveryRegistryRedCardTarget CircleFind Stores
Flex Paste 1 Lb. Rubber Sealant, Black - 1 of 1

Flex Paste 1 Lb. Rubber Sealant, Black

$35.00

In Stock

Free & easy returns
Free & easy returns
Return this item by mail or in store within 30 days for a full refund.
Sold & shipped by Jupiter Sales
Eligible for registries and wish lists

About this item

Highlights

  • Can be applied on dry or wet surfaces and even underwater
  • Turns into a strong, flexible, watertight, rubberized coating that seals out air, water, and moisture
  • Will not dissolve or wash away
  • UV resistant
  • Indoor/outdoor

Description

Flex Paste is a thick Paste that can be applied most surfaces, including under water and dries to flexible rubber. Coat, Seal and Protect. Super thick Rubberized Paste clings to surfaces and instantly fills gaps, cracks and holes. Expands and contracts and never shrinks. Paintable. Non Flamable, chemical and mildew resistant. Flex Paste clings to a wide variety of surfaces and will work on wood, glass, tile, concrete, aluminum, metal, brick, stucco, masonry, copper, fabric, fiberglass, ceramic, porcelain, natural stones, roofing, PVC, EIFS, EPDM, CSPE, Hypalon polyurethanes and more. Easy-to-use, making it a great option for crafts, hobbies, gardening and all types of projects.
Net weight: 16 ounces
Warranty: 1 Year Limited Warranty. To obtain a copy of the manufacturer's or supplier's warranty for this item prior to purchasing the item, please call Target Guest Services at 1-800-591-3869
TCIN: 1003258929
UPC: 850010226804
Origin: made in the USA and imported
The above item details were provided by the Target Plus™ Partner. Target does not represent or warrant that this information is accurate or complete. On occasion, manufacturers may modify their items and update their labels.
We recommend that you do not rely solely on the information presented. If you have a specific question about this item, you may consult the item's label, contact the manufacturer directly or call Target Guest Services at 1-800-591-3869.
If the item details aren’t accurate or complete, we want to know about it.

Shipping details

Estimated ship dimensions: 12 inches length x 12 inches width x 12 inches height
Estimated ship weight: 16 pounds
This item cannot be shipped to the following locations: American Samoa (see also separate entry under AS), Guam (see also separate entry under GU), Northern Mariana Islands, Puerto Rico (see also separate entry under PR), United States Minor Outlying Islands, Virgin Islands, U.S., APO/FPO, Alaska, Hawaii
item ships from third party seller: Jupiter Sales

Return details

This item can be returned to any Target store or Target.com.
This item must be returned within 30 days of the date it was purchased in store, delivered to the guest, delivered by a Shipt shopper, or picked up by the guest.
See the return policy for complete information.
WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov www.p65warnings.ca.gov For more information, go to https://www.p65warnings.ca.gov/

Additional product information and recommendations

Discover more options

Skip to next section

Frequently bought together

Skip to next section

Guests also viewed

Skip to next section

Guests are saying

Flex Seal Flex Paste is a versatile and effective solution for sealing leaks, cracks, and gaps in various surfaces. Guests appreciate its thick consistency, quick drying time, and strong adhesion, making it ideal for both indoor and outdoor repairs. Many have successfully used it for plumbing issues, roofing, and even automotive projects. Its ease of application and minimal mess further enhance its appeal, making it a must-have for any DIY enthusiast.
    Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
    4.3 out of 5 stars with 709 reviews
    4 out of 5 stars
    5 August, 2026
    originally posted on flexsealproducts.com
    Image

    Does a Thorough Job

    [This review was collected as part of a promotion.] I had a crack in an old wooden cabinet that over time kept getting larger. I used this flex tape to keeping it from getting larger and so far has worked great. I applied it to the inside of the cabinet and it was easy to do. Smoothed on easily and then set in quickly. Definitely would recommend if you are looking for something to really get into cracks/crevices that will also hold up.
    ChelseaQ
    Did you find this review helpful?
    5 out of 5 stars
    4 August, 2026
    originally posted on flexsealproducts.com
    Image

    Works just as it says

    [This review was collected as part of a promotion.] Flex Paste super Thick Rubber Paste is easy to apply and it does not have a strong scent. It takes a bit to dry and if you get it on your fingers it does clean up easily with an alcohol wipe. . I managed to fix my leaking mini humidifier that is my 5th one that has cracked and it’s a fixable leak around one side.
    SonjaB
    Did you find this review helpful?
    5 out of 5 stars
    4 August, 2026
    originally posted on flexsealproducts.com
    Image

    Lightweight and easy to use

    [This review was collected as part of a promotion.] Excellent product! The Flex Paste is very thick, easy to spread, and sticks well right out of the can. It creates a strong, waterproof seal and works great for filling gaps and stopping leaks. A little goes a long way, so the container lasts. I was impressed with how durable and flexible it stays after curing. Definitely a product I'd buy again for home repairs and DIY projects.
    Did you find this review helpful?
    5 out of 5 stars
    3 August, 2026
    originally posted on flexsealproducts.com
    Image

    Fantastic sealing and water tightness

    [This review was collected as part of a promotion.] I used this paste near my bathtub and it seems to offer a pretty good sealing! It is easy to clean off and does not leave a mess. The packaging is convenient & you can put the lid back on for storage, which is great! As for the odor, I don’t find it that bad but, with every other product, you’ll still have some lingering smell until it sets in.
    MohamedK
    Did you find this review helpful?
    5 out of 5 stars
    2 August, 2026
    originally posted on flexsealproducts.com
    Image

    Stops leaks

    [This review was collected as part of a promotion.] This Flex paste works exactly as I hoped. It was really easy to apply and completely close gaps! It created a strong waterproof seal once it dried. I would definitely recommend for future repairs.
    IbrahimA
    Did you find this review helpful?
    5 out of 5 stars
    1 August, 2026
    originally posted on flexsealproducts.com
    Image

    Great product!

    [This review was collected as part of a promotion.] Great product, spreads easily and works well! Used it to stop a small leak on my pool skimmer bucket and so far seems to have stopped the leak. This will go a long way!
    AnthonyD
    Did you find this review helpful?
    5 out of 5 stars
    1 August, 2026
    originally posted on flexsealproducts.com
    Image

    Another great product from Flex

    [This review was collected as part of a promotion.] i received this product to give my honest review.. Thank goodness i did because i brought this stuff with us camping in an RV. Wouldn’t you know, pipe issues!! I was smart to bring my flex paste because i dried off the crack, applied my trusty flex paste, waited for it to dry and wammo leak free. This is my go to brand for all things pipe related so i was excited to jump on the opportunity to try this product. looking around the house at what else i can use it for.. 10 out of 10 dont hesitate to try it especially got your RV needs
    TraceyS
    Did you find this review helpful?
    5 out of 5 stars
    31 July, 2026
    originally posted on flexsealproducts.com
    Image

    Dries quick and holds water!

    [This review was collected as part of a promotion.] This paste was super easy to use. We had a bucket with a crack and a few holes to test it. It was easy to use, you just spread it over the crack or hole and wait 24-48 hours to dry. I was spackling holes and a crack. I did find out that with an irregular crack it may take two applications to fully be water tight, but it worked! Very handy stuff to have. I can imagine using it for flower pots or buckets, but many other things as well. One thing to note is you shouldn’t leave the container open long as it will dry as soon as it touches air. But, it actually works!
    MarkB
    Did you find this review helpful?
    5 out of 5 stars
    30 July, 2026
    originally posted on flexsealproducts.com
    Image

    Works great

    [This review was collected as part of a promotion.] The flex seal it’s a great product work very quickly and after using you can tell it’s going to stay sealed for a long time the finish is sleek and bond is solid
    SavannahG
    Did you find this review helpful?
    5 out of 5 stars
    29 July, 2026
    originally posted on flexsealproducts.com
    Image

    Household must have!

    [This review was collected as part of a promotion.] I used this brand before to seal my bathroom walls from any water damage. I have the tall can of this flex paste which I have not finished using yet. But it does hold up well to ensure your home is sealed properly.
    MoniqueC
    Did you find this review helpful?
    5 out of 5 stars
    29 July, 2026
    originally posted on flexsealproducts.com
    Image

    Works well for leaking pipe

    [This review was collected as part of a promotion.] I had a pipe leaking in my laundry room and this was incredibly effective. It was easy to use, cleanup was a breeze, and it stopped the leak right away. I’m very pleased with the outcome and we haven’t had any leak since.
    MichaelR
    Did you find this review helpful?
    5 out of 5 stars
    26 July, 2026
    originally posted on flexsealproducts.com
    Image

    Seals well!

    [This review was collected as part of a promotion.] Flex pays did an amazing job at sealing the crack and the concrete floor. I no longer have to worry about water seeping down and making the crack worse. It looks like liquid rubber. Not very easy to clean up, so make sure to use an applicator like cardboard, one-time use gloves. I'd highly recommend this product.
    AJB0
    Did you find this review helpful?
    5 out of 5 stars
    26 July, 2026
    originally posted on flexsealproducts.com
    Image

    Durable

    [This review was collected as part of a promotion.] Such an incredible product! Does what the purpose of it is. East cleanup. Durable packaging. Fast drying time once applied and easy workability.
    AlmaS
    Did you find this review helpful?
    5 out of 5 stars
    24 July, 2026
    originally posted on flexsealproducts.com
    Image

    Easy to use

    [This review was collected as part of a promotion.] Flex Seal Flex Paste Super Thick Rubber Paste in black is a nice thick paste that was easy to apply. We used it to seal a hairline basement Crack to prevent water infiltration.
    GregoryS
    Did you find this review helpful?
    4 out of 5 stars
    24 July, 2026
    originally posted on flexsealproducts.com
    Image

    It works and I trust it.

    [This review was collected as part of a promotion.] To start off, I didn't really sniff it, but I didn't notice a strong chemical odor. It filled the spots where I needed it to. I used it on treated ground contact wood where I made cut to preserve and waterproof it. It took about half an hour to an hour to cure a thin layer. It seems to hold up strength wise, but time will tell. I always liked these products. This was my first time using the flex seal paste. It will work good around a chimney if you have a leak or shingle issues. I would have liked if it spread more easily. It's consistency is like a putty mixed with toothpaste if that help anyone. It doesn't go too far so use sparingly.
    SaifA
    Did you find this review helpful?
    4 out of 5 stars
    23 July, 2026
    originally posted on flexsealproducts.com
    Image

    Great waterproof and adhesive qualities!

    [This review was collected as part of a promotion.] I found the Flex paste seal extremely waterproof and easy to work with. The area I was trying to apply it in was tight, however, I used a small grout knife and managed to get it applied. It has great adhesive abilities and will definitely hold the water in for my toilet valve until I can pay a plumber to come in for a complete replacement. The product was dry within a couple of hours but I waited 24 hours to use it.
    DarlaH
    Did you find this review helpful?
    5 out of 5 stars
    19 July, 2026
    originally posted on flexsealproducts.com
    Image

    Foolproof

    [This review was collected as part of a promotion.] This could not have come at a better time! We have an above ground pool that sprang a leak. I was able to quickly fill the holes while not taking any time away from swimming!!
    HaileyP
    Did you find this review helpful?
    5 out of 5 stars
    18 July, 2026
    originally posted on flexsealproducts.com
    Image

    It seals

    [This review was collected as part of a promotion.] I was impressed by the spill-proof sealed container it arrived in, and after easily applying a small amount with a plastic knife to a leaking shower head in the guest bathroom, it dried quickly and resembled black electrical tape. It has a smooth but thick consistency that made it easy to apply.
    EvanS
    Did you find this review helpful?
    4 out of 5 stars
    18 July, 2026
    originally posted on flexsealproducts.com
    Image

    Black rubber sealant

    [This review was collected as part of a promotion.] I used this to seal a few nicks in my steering wheel cover. It worked pretty well after I sanded down the damage and gently patted a very small amount where I had sanded. It is thick and cured quickly but slightly sticky to the touch. I would recommend for using to seal objects that are not high touch areas.
    BrittG
    Did you find this review helpful?
    5 out of 5 stars
    18 July, 2026
    originally posted on flexsealproducts.com
    Image

    Good

    [This review was collected as part of a promotion.] Goos product! Easy to storage! Texture ok! I think last long so good! I will keep using it in the future! So recommend it! When I apply it! It easy to dry
    CindyV
    Did you find this review helpful?

    Get top deals, latest trends, and more.