---
product_id: 208933842
title: "Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, White, Quart"
brand: "flex paste"
price: "₩130197"
currency: KRW
in_stock: true
reviews_count: 8
category: "Flex Paste"
url: https://www.desertcart.kr/products/208933842-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks
store_origin: KR
region: South Korea
---

# Fully paintable & UV resistant Waterproof & dries underwater Super thick, fills large gaps instantly Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, White, Quart

**Brand:** flex paste
**Price:** ₩130197
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal it, paint it, forget it — Flex Paste has your repairs covered!

## Quick Answers

- **What is this?** Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, White, Quart by flex paste
- **How much does it cost?** ₩130197 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/208933842-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks)

## 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 rubberized barrier that blocks air, water, and moisture for lasting protection.
- • **Custom Finish Ready:** Once cured, paint it any color to blend seamlessly with your walls, roofs, or RVs while resisting UV damage.
- • **Freshness Locked In:** Innovative airtight container keeps your Flex Paste fresh and ready, eliminating waste and extending shelf life.
- • **Underwater Application:** Unique formula allows application and curing underwater—perfect for pools, boats, and emergency fixes.
- • **Versatile Surface Hero:** Adheres flawlessly to wood, concrete, metal, drywall, EPDM, and more—ideal for indoor and outdoor projects.

## Overview

Flex Paste is a premium waterproof, paintable rubberized putty designed to fill large gaps, cracks, and holes across multiple surfaces. Its airtight container preserves freshness, while its unique formula allows application and drying underwater. UV resistant and fully paintable, it offers durable protection against water, air, rust, and corrosion for walls, roofs, RVs, and more.

## Description

Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, White, Quart: desertcart.com: Tools & Home Improvement

Review: Good stuff, simple to use - I was worried bjt, it worked I repaired a fiberglass bathtub, it was thick, I globed it on and to worked good, my can was air tight and fresh, not permanent but long lasting patch, don't get it on your clothes,,,
Review: It really works! - This is an a-m-a-z-i-n-g product!!! I stumbled on a small can of it in a hardware store. It works so well, that I purchased a gallon. I am using it on the roof of my motor coach and a box trailer.

## 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 | B0851N5CGM |
| Best Sellers Rank | #18,141 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #51 in Hardware Sealers |
| Brand | Flex Paste |
| Brand Name | Flex Paste |
| Color | White |
| Compatible Material | Wood, Glass, Tile, Concrete, Aluminum, Metal, Brick, Stucco, Masonry, Copper, Fabric, Fiberglass, Ceramic, Porcelain, Natural Stones, Roofing, Pvc, Eifs, Cspe, Epdm, Hypalon Polyurethanes |
| Customer Reviews | 3.9 out of 5 stars 5,992 Reviews |
| Included Components | Item |
| Item Dimensions | 5 x 4.25 x 4.25 inches |
| Item Form | Paste |
| Item Type Name | Flex Paste PFSWHTR32 3 Lb. Tub - White |
| Item Weight | 3 Pounds |
| Item dimensions L x W x H | 5 x 4.25 x 4.25 inches |
| Manufacturer | Swift Response, LLC |
| Material | Rubber |
| Material Type | Rubber |
| Style | 3 lb White |
| Style Name | 3 lb White |
| Supported Standards | ASTM C-920 |
| Surface Recommendation | Doors,Tub |
| UPC | 850010226842 |
| Unit Count | 48.0 Ounce |
| Warranty Description | 1 Year Limited |
| Water Resistance Level | Waterproof |

## Product Details

- **Material:** Rubber
- **Brand:** Flex Paste
- **Style:** 3 lb White
- **Item Weight:** 3 Pounds
- **Item dimensions L x W x H:** 5 x 4.25 x 4.25 inches

## Images

![Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, White, Quart - Image 1](https://m.media-amazon.com/images/I/81qBgpBU9IL.jpg)
![Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, White, Quart - Image 2](https://m.media-amazon.com/images/I/81KMlJUWGbL.jpg)
![Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, White, Quart - Image 3](https://m.media-amazon.com/images/I/71CQ1HulkcL.jpg)
![Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, White, Quart - Image 4](https://m.media-amazon.com/images/I/814nIz98SUL.jpg)
![Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, White, Quart - Image 5](https://m.media-amazon.com/images/I/91UDIpFG1wL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: Could you do several layers or one very thick layer to create a rubberized coating on something?**
A: Absolutely, just please remember that the thicker the final coating is, the longer the cure time will be. We highly advise creating the coating by adding layers to the surface rather than just one thick coat.

**Q: Any temperature requirement?**
A: Flex Paste can be applied in a wide range of temperatures from 0°F – 150ۜ°F. Once applied and fully cured it can withstand a wider range of temperatures from -40°F – 200°F.

**Q: Can this be used to fix crack in small ref/frezer**
A: Hi there. Thank you so much for reaching out. Flex Paste can withstand low temps like that in a freezer. Although some customers have found success with similar applications, it has not been tested for its safety when coming in contact with items used for food preparation, storing, or serving. Please contact us if you have any additional questions. We're always happy to help. Flex On!

**Q: can flex paste be painted ?**
A: Yes. Must be fully cured before painting.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good stuff, simple to use
*by L***K on April 18, 2025*

I was worried bjt, it worked I repaired a fiberglass bathtub, it was thick, I globed it on and to worked good, my can was air tight and fresh, not permanent but long lasting patch, don't get it on your clothes,,,

### ⭐⭐⭐⭐⭐ It really works!
*by B***Y on February 20, 2026*

This is an a-m-a-z-i-n-g product!!! I stumbled on a small can of it in a hardware store. It works so well, that I purchased a gallon. I am using it on the roof of my motor coach and a box trailer.

### ⭐ Does NOT work as advertised!!!
*by C***S on October 28, 2024*

UPDATE - I have been monitoring the pipe for the last few days. While I initially thought the paste was going to provide the fix I needed, that "thought" would be incorrect. The water started leaking again. Be smart/save your money and do not buy this stuff. I'm going back to what I should have done to start with - turn off the water and replace the pipe. This Flex Paste is JUNK!!!! Had a very small leak at the base of this water faucet (small droplets of water on the PVC surface). Based on the advertisement I thought the paste would be the perfect fix. I followed the directions as stated on the container. After apply a good initial coat, I still had the small leak. The next day, I applied another coat - still had the leak. The next day, after turning off the water to everything, I applied another coat heavy/massive amount of paste using both a putty knife and my hand. Left the water off for 1 to 2 hours and the leak appears to have stopped (after using most of the paste). What a pain!!! While using the paste, I was diligent in keeping the lid on the paste. At the end of each day, I would use a rubber mallet to hammer the lid on. Regardless of the tight seal, the paste still hardened. Probably would have been easier to just replace the bad piece of PVC that was leaking.

## Frequently Bought Together

- Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, White, Quart
- Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 9 oz, 1-Pack
- Flex Seal Liquid, 1 Gallon, White, Liquid Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry

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**Shop now:** [https://www.desertcart.kr/products/208933842-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks](https://www.desertcart.kr/products/208933842-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-02*