---
product_id: 312007933
title: "Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs"
brand: "flex paste"
price: "¥62737"
currency: JPY
in_stock: true
reviews_count: 8
url: https://www.desertcart.jp/products/312007933-flex-paste-max-12-lb-can-white-waterproof-paintable-putty
store_origin: JP
region: Japan
---

# Dries Underwater for Ultimate Versatility Super Thick Rubber Paste Fills Large Gaps Waterproof & UV Resistant Seal Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs

**Brand:** flex paste
**Price:** ¥62737
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it. Paint it. Forget it. The ultimate fix for every crack and crevice.

## Quick Answers

- **What is this?** Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs by flex paste
- **How much does it cost?** ¥62737 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/312007933-flex-paste-max-12-lb-can-white-waterproof-paintable-putty)

## Best For

- flex paste enthusiasts

## Why This Product

- Trusted flex paste brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seal Like a Pro:** Creates a flexible, watertight barrier that blocks air, water, and moisture for lasting protection.
- • **Paint It Your Way:** Fully paintable once cured, blending seamlessly with any décor while preventing rust and corrosion.
- • **Freshness Locked In:** Innovative Stay Fresh container prevents waste by blocking air and preserving sealing power.
- • **Heavy-Duty Coverage:** Super thick 12 lb can fills large cracks, holes, and gaps instantly, saving time and effort.
- • **Versatile Application:** Perfect for walls, concrete, roofs, RVs, marine, and even underwater repairs—DIY or professional-grade.

## Overview

Flex Paste MAX is a 12 lb waterproof, paintable rubberized putty designed to fill and seal large gaps, cracks, and holes. Its unique formula creates a flexible, watertight barrier that blocks air, water, and moisture, and it even cures underwater. Packaged in an innovative Stay Fresh container, it prevents waste and extends sealing power. Ideal for indoor and outdoor use on walls, concrete, roofs, RVs, and more, it’s UV resistant and paintable, making it the go-to solution for durable, professional-grade repairs.

## Description

Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - desertcart.com

Review: Great buy - When you are trying to repair your parents’ old house , and trying to keep costs down., this is one of the best things to use . It’s not goopy but easy to transfer, spread , and plugs the holes , tears, or whatever the damage that you found. We used some on one of our bathrooms too. Fantastic !!
Review: Sealed basement cracks and lowered radon levels - I loved this product. I used it to seal the cracks in my basement and 6 weeks later my radon levels have been cut in half!

## Features

- NEW! STAY FRESH CONTAINER – Blocks out air and locks in freshness to extend the sealing power of Flex Paste, with no waste
- COAT, SEAL & PROTECT - Penetrates deep to seal out air, water, and moisture. Once dry, it turns into a strong, flexible, watertight, rubberized barrier
- WORKS UNDERWATER - Can be applied underwater, and it even dries underwater
- FILLS LARGE AREAS - Super thick rubber paste clings to the surface and instantly fills large gaps, cracks, and holes
- FULLY PAINTABLE - Once fully cured, it can be painted any color. Helps prevent rust and corrosion, and it is UV resistant
- EXCELLENT FOR – filling cracks and holes, foundation and concrete repairs, sealing out rodents and pests, bath and shower, indoor and outdoor projects, roof, RV, motorhome, auto, marine, lawn and garden projects, DIY, hobbies, and more
- MADE IN THE USA

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B084TDHKVJ |
| Assembled Diameter | 1 Millimeters |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #772,060 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,725 in Hardware Sealers |
| Brand | Flex Paste |
| Color | White |
| Customer Reviews | 4.0 4.0 out of 5 stars (120) |
| Cutting Diameter | 1 Millimeters |
| Date First Available | February 14, 2020 |
| Included Components | Household Item |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Weight | 12 pounds |
| Item model number | FLEX SEAL - PFSMAXWHT01 - WHITE |
| Manufacturer | Swift Response, LLC |
| Material | Rubber |
| Measurement System | US |
| Number Of Pieces | 1 |
| Number of Items | 1 |
| Part Number | PFSMAXWHT01 |
| Style | 12 lb WHT |
| Surface Recommendation | Tub |
| UPC | 850010226897 |
| Unit Count | 192.0 Ounce |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Flex Paste
- **Item Weight:** 12 Pounds
- **Item dimensions L x W x H:** 7.75 x 6.75 x 6.75 inches
- **Material:** Rubber
- **Style:** 12 lb WHT

## Images

![Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - Image 1](https://m.media-amazon.com/images/I/81vv0bSfptL.jpg)
![Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - Image 2](https://m.media-amazon.com/images/I/81riPhn3yfL.jpg)
![Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - Image 3](https://m.media-amazon.com/images/I/71D0F0Q1feL.jpg)
![Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - Image 4](https://m.media-amazon.com/images/I/81tplSJMsDL.jpg)
![Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - Image 5](https://m.media-amazon.com/images/I/91S6B0JXcFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great buy
*by D***Z on October 19, 2021*

When you are trying to repair your parents’ old house , and trying to keep costs down., this is one of the best things to use . It’s not goopy but easy to transfer, spread , and plugs the holes , tears, or whatever the damage that you found. We used some on one of our bathrooms too. Fantastic !!

### ⭐⭐⭐⭐⭐ Sealed basement cracks and lowered radon levels
*by P***R on August 8, 2021*

I loved this product. I used it to seal the cracks in my basement and 6 weeks later my radon levels have been cut in half!

### ⭐ Shame! shame! shame!
*by A***R on September 27, 2024*

Rating is "0". Product could not be used. It was as hard as a brick. We tried to make a hole toward the bottom to see if it was softer, it was as hard as the top. We tried to spread it on the roof, it would not work. We has to run to Walmart to get new cans to do the job.

## Frequently Bought Together

- Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs
- Flex Tape, MAX, 4 in x 25 ft, Clear, Original Thick Flexible Rubberized Waterproof Tape - Seal and Patch Leaks, Works Underwater, Indoor Outdoor Projects - Home RV Roof Plumbing and Pool Repairs
- Flex Tape, MAX, 4 in x 25 ft, White, Original Thick Flexible Rubberized Waterproof Tape - Seal and Patch Leaks, Works Underwater, Indoor Outdoor Projects - Home RV Roof Plumbing and Pool Repairs

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**Shop now:** [https://www.desertcart.jp/products/312007933-flex-paste-max-12-lb-can-white-waterproof-paintable-putty](https://www.desertcart.jp/products/312007933-flex-paste-max-12-lb-can-white-waterproof-paintable-putty)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-18*