Flex Seal MAX Liquid Rubber Sealant Coating, 2.5 Gallon, Black
Flex Seal MAX Liquid Rubber Sealant Coating, 2.5 Gallon, Black
Hero image 0 of Flex Seal MAX Liquid Rubber Sealant Coating, 2.5 Gallon, Black, 0 of 7
Visit the Flex Seal Store

Flex Seal MAX Liquid Rubber Sealant Coating, 2.5 Gallon, Black

444 ratings
Flex Seal MAX Liquid Rubber Sealant Coating, 2.5 Gallon, BlackFlex Seal MAX Liquid Rubber Sealant Coating 2 5 Gallon BlackFlex Seal MAX Liquid Rubber Sealant Coating 2 5 Gallon White
Actual ColorBlack

Key item features

  • Versatile Application: Flex Seal Liquid can be brushed, rolled, dipped, or poured on for various uses.
  • Watertight Seal: Provides a flexible, rubberized coating that seals out water, air, and moisture.
  • Rust Prevention: Prevents rust and corrosion, and is resistant to mildew and chemicals.
  • Maximum Coverage: Covers up to 20% more area than the original size, making it an economical choice.
  • Easy to Use: Goes on smooth and covers fast, ideal for quick repairs and sealing projects.
  • Multiple Uses: Suitable for fixing leaky roofs, gutters, RVs, skylights, pipes, windowsills, and more.
  • Durable Protection: When applied correctly, it can last for many years, providing long-term protection.
Generated by AI

About this item

Product details

Specifications

Warranty

Customer ratings & reviews

4.5 out of 5 stars
stars
444 ratings289 reviews
How item rating is calculated
  1. 5 stars76% (339)
  2. 4 stars11% (48)
  3. 3 stars5% (22)
  4. 2 stars1% (5)
  5. 1 star7% (30)

Reviews summary

Pros

  • : Fills small cracks and crevices immediately.
  • : Can stretch to accommodate movement.
  • : Application process is straightforward with a brush or pouring.
  • : Forms a seal to stop leaks in various surfaces and applications.

Neutral

  • : Can be effective, but varies by surface type.
  • : The product smells strong when applied but fades on drying.
Generated by AI
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 289 reviews

Apr 23, 2026
Reviewer name: David
Item details
Color: White
Sold and shipped byThe Factory Depot
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Why i chose this, because it works. If you read or research the manufactures preparations prior to applying, you will find that "It Works". Really, the temperature range is between ( -80° ~ 350° ) , wow ! Only thing I did not care for was the smell at first. The off gas is bad. Always use your ppe respirator. In a few hours it dissipates and the smell is much weaker.

Helpful?2MK9GBITJ3H7821243511
Feb 26, 2024
Reviewer name: JackieF
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Great Stuff!

We had some water coming in our basement through a concrete wall. We painted the entire wall with flex seal and it sealed the deal. It really works and is easy to use. We have used this product before and it does the job...it works exactly like they say...you will not be disappointed.

Review from flexsealproducts.com
Helpful?2MK9GBITJ3H7821243511
reply from Flex Seal Family of Products Customer Care

Hi there! Thank you so much for your 5 star rating. If you'd like some helpful tips and tricks for future DIY's, feel free to message us at humans@flexsealproducts.com. Flex On!

Oct 12, 2023
Reviewer name: mtrctyjake
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Liquid Rubber is the BEST!

I used Flex Seal liquid rubber on a hairline crack on outer basement wall, application went on easy, used two coats...I feel very confident this will solve my problem. I researched many different products and I believe this is the Best product for my problem...Lord willing I'll have no more leaks!

Review from flexsealproducts.com
Helpful?2MK9GBITJ3H7821243511
reply from Flex Seal Family of Products Customer Care

Hi there! Thank you so much for your 5 star rating. If you'd like some helpful tips and tricks for future DIY's, feel free to message us at humans@flexsealproducts.com. Flex On!

Current price is $203.16
Price when purchased online
  • Free shipping
  • Free 90-day returns
Free Painting Service Quote
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $203.16
Your usuals, on your schedule
Save time and stay stocked!
One-time purchase $203.16

How do you want your item?

Try 30 days for just $1! Choose a plan at checkout.
How do you want your item?
Ships to
Arrives by Mon, Sep 21
.
Order within 8 hr 19 min
Sold and shipped by Walmart.com
Free 90-day returns
This item is gift eligible

More seller options (3)

Starting from $261.21
walmart plus

Try 30 days of Walmart+ for just $1!

T&C apply.