Skip to main content
HalloweenPetLawn & GardenTruck & AutomotiveSporting GoodsHorseFarm & RanchClothingLivestockPet & Animal PharmacyToolsPoultryFencing & GatesHome ImprovementOutdoor LivingHeating & CoolingHome Decor & FurnitureOutdoor Power EquipmentTrailers & TowingBoots & ShoesWild Birds & WildlifeToysGift CardsServices Propane RefillTrailer RentalGarden CenterFeed CenterSame Day DeliveryPetVet ClinicPet WashGrooming at PetsenseDog Training at PetsenseTractor Supply RxPet InsuranceWag!

"Savings and Offers"

Weekly AdSaleClearance

"More Options"

Weekly AdWhat's NewTractor Supply AppEarn Rewards with Neighbor's ClubHometown HeroesLife Out Here BlogTSC Exclusive BrandsTop BrandsClearance ItemsBattery FinderOutdoor Power Equipment Parts FinderHitch Finder

Spend $49.99 to unlock Free Delivery on most orders

|
Learn More
Order statusTSC Credit CardsWhat’s newPetsenseWeekly Ad
​
Sign In / EnrollGet rewarded!
​
Halloween
Pet
Lawn & Garden
Truck & Automotive
Sporting Goods
Horse
Farm & Ranch
Clothing
Livestock
Pet & Animal Pharmacy
Tools
Poultry
Fencing & Gates
Home Improvement
Outdoor Living
Heating & Cooling
Menu

Search

Home

Sign In

Cart
4.2
(668)
4.2 out of 5 stars. 668 reviews
A woman outside with a dog
A woman outside with a dog
  1. Home
  2. /
  3. Home Improvement
  4. /
  5. Painting
  6. /
  7. Adhesives & Sealants
  8. /
  9. Other Sealants
  10. /

  11. Flex Seal 3 lb. Flex Paste Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack

  1. Home
  2. /
  4. /
  5. Other Sealants

Flex Seal 3 lb. Flex Paste Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack

Shop all Flex Seal
Flex Seal 3 lb. Flex Paste Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack

Item # 192944399

Flex Seal Flex Seal 3 lb. Flex Paste Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack
Flex Seal Flex Seal 3 lb. Flex Paste Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack

Add this item to unlock free delivery!

Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

Shop all Flex Seal
Flex Seal 3 lb. Flex Paste Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack

Item # 192944399

Flex Seal Flex Seal 3 lb. Flex Paste Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack
Flex Seal Flex Seal 3 lb. Flex Paste Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack

Subscription options

$13299

$13999

Save$700(5%)

Save 5% today and on all future orders

Pickup or delivery when it works for you, plus free delivery on orders over $49.99.

Skip, modify, or cancel anytime.

$139.99

Add this item to unlock free delivery!

This item is available online only

Delivery to

Free standard delivery on online footwear & Clothing purchases of $49 and over.

​
Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

FLEX PASTE is a super thick rubberized paste that you can spread, shape, form, and seal virtually everything. It starts out as a thick paste and dries to a strong, flexible, rubber coating that can be applied to all types of surfaces to seal out air, water, and moisture. It clings to the surface and instantly fills large gaps, cracks, and holes. It won't shrink or wash away and can be painted any color. Can be applied on dry or wet surfaces, even underwater! Available in white and black. In Tubs and Cartridges.Flex Paste works 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 much more. Available in 9 oz. caulk gun cartridge, 1 lb. large Jar, 3 lb. x large Tub, 6 lb. Jumbo Tub, 12 lb. Giant Tub.

  • Fixing cracks and holes
  • Foundation and concrete repair
  • Sealing out rodents and pests
  • Bath and shower repair
  • Indoor and outdoor projects
  • Roof repair
  • RV and motorhome repair
  • Auto repairs
  • Boat repair
  • Lawn and garden projects
BrandFlex Seal
Country of OriginMade in USA
Container Size3 lb.
Coverage Area30 ft per 3 lb.
Cure Time24 hr.
Dry to Touch15-30 minutes
FeaturesMoisture Resistant, Paintable/Stainable
Indoor/OutdoorIndoor and Outdoor
Longevity99 years
Package Quantity4
Primary ColorBlack
Product Height5 in.
Product Length5 in.
Product Weight3 lb.
Product Width5 in.
Sealant FormOther
Sealant TypeRubber
Manufacturer Part NumberPFSBLKR32
No questions have been asked about this product.

No questions have been asked about this product.

Q&As

No questions have been asked about this product.

No questions have been asked about this product.

Similar Items

  1. Flex Seal 9 oz. Flex Paste Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack
    4.3 out of 5 stars with 633 reviews
    4.3 (633)

    Flex Seal 9 oz. Flex Paste Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack

    $59.99
  2. Flex Seal 3 lb. Flex Paste White All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack
    4.2 out of 5 stars with 672 reviews
    4.2 (672)

    Flex Seal 3 lb. Flex Paste White All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack

    $139.99
  3. Flex Seal Flex Paste 1 lb. Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4 pack
    4.3 out of 5 stars with 736 reviews
    4.3 (736)

    Flex Seal Flex Paste 1 lb. Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4 pack

    $59.99
  4. Flex Seal 12 lb. Flex Paste MAX White All Purpose Strong Flexible Watertight Multi-Purpose Sealant
    4.3 out of 5 stars with 643 reviews
    4.3 (643)

    Flex Seal 12 lb. Flex Paste MAX White All Purpose Strong Flexible Watertight Multi-Purpose Sealant

    $239.99
  5. Flex Seal Flex Paste 1 lb. White All Purpose Strong Flexible Watertight Multi-Purpose Sealant
    4.2 out of 5 stars with 668 reviews
    4.2 (668)

    Flex Seal Flex Paste 1 lb. White All Purpose Strong Flexible Watertight Multi-Purpose Sealant

    $59.99
  6. Flex Seal Flex Paste MAX 12 lb. Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant 2 pack
    4.3 out of 5 stars with 652 reviews
    4.3 (652)

    Flex Seal Flex Paste MAX 12 lb. Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant 2 pack

    $239.99
  7. Flex Seal Paste 9 oz. White All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4 pack
    4.3 out of 5 stars with 633 reviews
    4.3 (633)

    Flex Seal Paste 9 oz. White All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4 pack

    $59.99
  8. Top Rated
    Flex Seal 8 oz. Flex Shot Clear Thick Rubber Adhesive Caulking Sealant, 4-Pack
    4.8 out of 5 stars with 80 reviews
    4.8 (80)

    Flex Seal 8 oz. Flex Shot Clear Thick Rubber Adhesive Caulking Sealant, 4-Pack

    $67.99
  9. Flex Seal 14 oz. Green Aerosol Liquid Rubber Sealant Coating, 6-Pack
    4.5 out of 5 stars with 666 reviews
    4.5 (666)

    Flex Seal 14 oz. Green Aerosol Liquid Rubber Sealant Coating, 6-Pack

    $89.99
  10. Flex Seal 2 oz. Black Liquid Rubber Sealant Spray, Mini Can
    4.5 out of 5 stars with 681 reviews
    4.5 (681)

    Flex Seal 2 oz. Black Liquid Rubber Sealant Spray, Mini Can

    $7.49
  11. Flex Seal 14 oz. Blue Aerosol Liquid Rubber Sealant Coating, 6-Pack
    4.6 out of 5 stars with 665 reviews
    4.6 (665)

    Flex Seal 14 oz. Blue Aerosol Liquid Rubber Sealant Coating, 6-Pack

    $89.99
  12. Flex Seal 2.5 gal. Liquid MAX Black Liquid Rubber Sealant Coating
    4.5 out of 5 stars with 378 reviews
    4.5 (378)

    Flex Seal 2.5 gal. Liquid MAX Black Liquid Rubber Sealant Coating

    $239.99

Items You May Like

  1. Flex Seal 2.5 gal. Liquid MAX White Liquid Rubber Sealant Coating
    4.5 out of 5 stars with 384 reviews
    4.5 (384)

    Flex Seal 2.5 gal. Liquid MAX White Liquid Rubber Sealant Coating

    $239.99
  2. Flex Seal Liquid Gray Liquid Rubber Sealant Coating, 6-Pack
    4.3 out of 5 stars with 147 reviews
    4.3 (147)

    Flex Seal Liquid Gray Liquid Rubber Sealant Coating, 6-Pack

    $109.99
  3. Top Rated
    Gardner-Gibson 3.6 qt. Leak Stopper Rubberized Roof Patch
    4.8 out of 5 stars with 20 reviews
    4.8 (20)

    Gardner-Gibson 3.6 qt. Leak Stopper Rubberized Roof Patch

    $23.99
  4. Titebond WeatherMaster Sealant Gray - 9.5 Oz. (12 Pack)
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Titebond WeatherMaster Sealant Gray - 9.5 Oz. (12 Pack)

    $85.49
    Was $94.99Save $9.50
  5. Flex Seal 1 gal. Liquid Gray Liquid Rubber Sealant Coating, 2-Pack
    4.5 out of 5 stars with 369 reviews
    4.5 (369)

    Flex Seal 1 gal. Liquid Gray Liquid Rubber Sealant Coating, 2-Pack

    $219.99
  6. Flex Seal 14 oz. Clear Aerosol Liquid Rubber Sealant Coating
    4.5 out of 5 stars with 678 reviews
    4.5 (678)

    Flex Seal 14 oz. Clear Aerosol Liquid Rubber Sealant Coating

    $18.99
  7. Icon RV Roof Sealant, White, 12062
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Icon RV Roof Sealant, White, 12062

    $17.09
    Was $18.99Save $1.90
  8. Flex Seal 1 gal. Liquid White Liquid Rubber Sealant Coating, 2-Pack
    4.5 out of 5 stars with 383 reviews
    4.5 (383)

    Flex Seal 1 gal. Liquid White Liquid Rubber Sealant Coating, 2-Pack

    $219.99
  9. Titebond 9.5 oz. WeatherMaster Green Metal Roof Sealant, 12 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Titebond 9.5 oz. WeatherMaster Green Metal Roof Sealant, 12 pk.

    $85.49
    Was $94.99Save $9.50
  10. Top Rated
    Permatex 16 oz. General Purpose Thread Sealant
    5.0 out of 5 stars with 2 reviews
    5.0 (2)

    Permatex 16 oz. General Purpose Thread Sealant

    $16.19
    Was $17.99Save $1.80
  11. Titebond 9.5 oz. WeatherMaster Clear Metal Roof Sealant, 12 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Titebond 9.5 oz. WeatherMaster Clear Metal Roof Sealant, 12 pk.

    $107.99
    Was $119.99Save $12.00
  12. Titebond WeatherMaster Sealant Clear - 9.5 oz. (12 Pack)
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Titebond WeatherMaster Sealant Clear - 9.5 oz. (12 Pack)

    $157.49
    Was $174.99Save $17.50

Customers Also Bought

  1. Flex Seal 9 oz. Flex Glue Clear Pro-Formula Strong Rubberized Waterproof Adhesive, 6-Pack
    4.5 out of 5 stars with 285 reviews
    4.5 (285)

    Flex Seal 9 oz. Flex Glue Clear Pro-Formula Strong Rubberized Waterproof Adhesive, 6-Pack

    $89.99
  2. Flex Seal 14 oz. Gray Color Liquid Rubber Sealant Spray, 6-Pack
    4.6 out of 5 stars with 635 reviews
    4.6 (635)

    Flex Seal 14 oz. Gray Color Liquid Rubber Sealant Spray, 6-Pack

    $89.99
  3. Flex Seal 14 oz. Red Aerosol Liquid Rubber Sealant Coating, 6-Pack
    4.5 out of 5 stars with 667 reviews
    4.5 (667)

    Flex Seal 14 oz. Red Aerosol Liquid Rubber Sealant Coating, 6-Pack

    $89.99
  4. Flex Seal 16 oz. Liquid Black Liquid Rubber Sealant Coating, 6-Pack
    4.5 out of 5 stars with 366 reviews
    4.5 (366)

    Flex Seal 16 oz. Liquid Black Liquid Rubber Sealant Coating, 6-Pack

    $109.99
  5. Flex Seal 1 gal. Liquid Black Liquid Rubber Sealant Coating, 2-Pack
    4.5 out of 5 stars with 382 reviews
    4.5 (382)

    Flex Seal 1 gal. Liquid Black Liquid Rubber Sealant Coating, 2-Pack

    $219.99
  6. Flex Seal 16 oz. Liquid Clear Liquid Rubber Sealant Coating, 6-Pack
    4.3 out of 5 stars with 143 reviews
    4.3 (143)

    Flex Seal 16 oz. Liquid Clear Liquid Rubber Sealant Coating, 6-Pack

    $109.99
  7. Flex Seal 16 oz. Liquid White Liquid Rubber Sealant Coating, 6-Pack
    4.5 out of 5 stars with 204 reviews
    4.5 (204)

    Flex Seal 16 oz. Liquid White Liquid Rubber Sealant Coating, 6-Pack

    $109.99
  8. Flex Seal 17 oz. MAX White Aerosol Liquid Rubber Sealant Coating, 4-Pack
    4.6 out of 5 stars with 629 reviews
    4.6 (629)

    Flex Seal 17 oz. MAX White Aerosol Liquid Rubber Sealant Coating, 4-Pack

    $67.99
  9. Flex Seal 14 oz. Almond Aerosol Liquid Rubber Sealant Coating, 6-Pack
    4.5 out of 5 stars with 668 reviews
    4.5 (668)

    Flex Seal 14 oz. Almond Aerosol Liquid Rubber Sealant Coating, 6-Pack

    $89.99
  10. Flex Seal 14 oz. Brown Aerosol Liquid Rubber Sealant Coating, 6-Pack
    4.6 out of 5 stars with 669 reviews
    4.6 (669)

    Flex Seal 14 oz. Brown Aerosol Liquid Rubber Sealant Coating, 6-Pack

    $89.99
  11. 14 oz. Flex Seal Black Aerosol Liquid Rubber Sealant Coating
    4.6 out of 5 stars with 674 reviews
    4.6 (674)

    Unbranded14 oz. Flex Seal Black Aerosol Liquid Rubber Sealant Coating

    $18.99
  12. Top Rated
    Permatex 12 oz. Copper Spray-A-Gasket Hi-Temp Adhesive Sealant
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Permatex 12 oz. Copper Spray-A-Gasket Hi-Temp Adhesive Sealant

    $19.99

Reviews

Rating Snapshot

Select a row below to filter reviews.

5 starsstars

435
435 reviews with 5 stars.

4 starsstars

95
95 reviews with 4 stars.

3 starsstars

56
56 reviews with 3 stars.

2 starsstars

26
26 reviews with 2 stars.

1 starstars

56
56 reviews with 1 star.

Overall Rating

4.2
352 out of 379 (93%) reviewers recommend this product

Review this Product

Select to rate the item with 1 star. This action will open submission form.
Select to rate the item with 2 stars. This action will open submission form.
Select to rate the item with 3 stars. This action will open submission form.
Select to rate the item with 4 stars. This action will open submission form.
Select to rate the item with 5 stars. This action will open submission form.
Adding a review will require a valid email for verification
  • purchase
  • packaging
  • satisfaction
  • price
  • large
  • ease of use
  • repairs
  • small
1 to 4 of 668 Reviews .
1 – 4 of 668 Reviews
Sort by
Most Recent
dariand_8294
Review 1
5 out of 5 stars.

Great Quick Fix

a year ago
Great product!! We used this to seal a spot on our roof that was leaking. It has held up great and is a quick fix for many household projects. Would definitely recommend to any homeowner.

Originally posted on flexsealproducts.com

kyyyyle_7653
Review 1
5 out of 5 stars.

It works

a year ago
Since it’s a paste, it’s a little thick. But it works! We had a leaky pipe under the sink, we put the paste on one layer and an hour later, no more leaks. Received this product for free.

Originally posted on flexsealproducts.com

tammyc122222
Review 1
5 out of 5 stars.

Fill in

2 years ago
We used this to seal around our tub works well and is very durable. It was easy to use and a small amount goes a long way. I would recommend this product to others

Originally posted on flexsealproducts.com

carolineh
Review 1
4 out of 5 stars.

Easy!

2 years ago
I’ve seen this product so many times but never used it until now. We had a leaky and constantly moving spot from the outside wall around a spigot and I applied this around the faucet and in the space between the wall. It worked wonderfully! It sealed the space up and the faucet no longer moves and was super easy to do. Next up….craft projects!

Originally posted on flexsealproducts.com

Get the top deals, latest trends and more
Sign up for emails from Tractor Supply today.
First Name*
Last Name*
Email*

Customer Support

  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  

    (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

About Us

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

Work With Us

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

Neighbor's Club

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

Credit Center

  • TSC Credit Card

  • Klarna

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More
  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

  • TSC Credit Card

  • Klarna

Connect & Share with the Tractor Supply Community.

Shop on the go with the Tractor Supply App

Learn More
  • Privacy policy
  • Your Privacy Choices
  • Terms and Conditions
  • California Transparency Act
  • Legal Notices
  • Accessibility
  • Responsible Disclosure Statement
  • Surprise (Balance) Medical Billing Disclosure
  • Transparency in Coverage
  • Human Rights Policy
  • Vendor Code of Conduct
  • California Notice of Collection
  • Privacy Requests

© 2026, Tractor Supply Co. All Rights Reserved.