---
product_id: 526863387
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, Black, Cartridge"
brand: "flex paste"
price: "₩9477"
currency: KRW
in_stock: true
reviews_count: 5
url: https://www.desertcart.kr/products/526863387-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks
store_origin: KR
region: South Korea
---

# Fully paintable, customizable finish Dries underwater, blocks moisture Waterproof & UV resistant seal 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, Black, Cartridge

**Brand:** flex paste
**Price:** ₩9477
**Availability:** ✅ In Stock

## Summary

> 🖌️ Seal it, paint it, forget it – Flex Paste keeps your space flawless!

## 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, Black, Cartridge by flex paste
- **How much does it cost?** ₩9477 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/526863387-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

- • **Custom Finish Ready:** Paint over once cured to match any décor and prevent rust
- • **Stay Fresh Container:** Locks in freshness, no waste, longer sealing power
- • **Super Thick Fill Power:** Instantly fills large gaps, cracks, and holes with durable rubber paste
- • **Underwater Application:** Apply and cure even underwater for unmatched versatility
- • **Ultimate Waterproof Barrier:** Creates a flexible, rubberized shield against air and water

## Overview

Flex Paste is a premium waterproof, paintable rubberized putty designed to seal and protect surfaces from air, water, and UV damage. Its innovative stay-fresh container preserves product integrity, while its thick, flexible formula fills large gaps and cures underwater. Ideal for walls, drywall, concrete, roofs, and RV repairs, it offers a durable, customizable finish that prevents rust and corrosion.

## Description

Full description not available

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Rubber |
| Brand | Flex Paste |
| Style | 9 oz Black |
| Item Weight | 9 Ounces |
| Item dimensions L x W x H | 28.6 x 7.6 x 7.6 Centimeters |
| Water Resistance Level | Waterproof |
| Item Form | Paste |
| UPC | 850010226859 |
| Net Quantity | 1.0 Count |
| Number of Items | 1 |
| Colour | Black |
| Surface Recommendation | Windows,Doors |
| Manufacturer | Swift Response, LLC |
| Model number | FLEX SEAL - PFSBLKR10 - BLACK |
| Item Weight | 255 g |
| Product Dimensions | 28.58 x 7.62 x 7.62 cm; 255.15 g |
| Item model number | FLEX SEAL - PFSBLKR10 - BLACK |
| Item Height | 3 Inches |
| Item Width | 3 Inches |
| Included Components | Household Item |
| Are batteries included? | No |

## Product Details

- **Material:** Rubber
- **Brand:** Flex Paste
- **Style:** 9 oz Black
- **Item Weight:** 9 Ounces
- **Item dimensions L x W x H:** 28.6 x 7.6 x 7.6 Centimeters

## 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, Black, Cartridge - Image 1](https://m.media-amazon.com/images/I/61cv+cPofgL.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, Black, Cartridge - Image 2](https://m.media-amazon.com/images/I/61dK90UK12L.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, Black, Cartridge - Image 3](https://m.media-amazon.com/images/I/914tMpgmSuL.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, Black, Cartridge - Image 4](https://m.media-amazon.com/images/I/9107B1PS2wL.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, Black, Cartridge - Image 5](https://m.media-amazon.com/images/I/810+KPaaYuL.jpg)

## Questions & Answers

**Q: Can I use it around the base of my toilet?**
A: You can! We recommend keeping it near the base of the toilet and not spreading it through the floor as it can become slippery when wet. Let us know how the project goes!

**Q: can flex glue be used to repair a roho inflatable neoprene wheelchair cushion?**
A: not sure, they make a tape like duct tape, that might work.  The paste is  more for sealing cracks.

**Q: can you paint after this is applied?**
A: Spray paint might eat the rubber away or anything else that has more of a solvent when you paint I wouldn’t use on this

**Q: Will it fix a hole puncture on a 8” subwoofer?**
A: Yes read my post about the puncture on my 2016 ford interceptor rear quarter panel worked like a champ on this damage from a corner of a shelf on the wall

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    works great
  

*by M***S on Reviewed in the United States on 5 September 2024*

I used this on a broken gutter and worked great.  It does not leak anymore.

### ⭐⭐⭐⭐⭐ 







  
  
    Time will tell
  

*by C***J on Reviewed in the United States on 4 October 2024*

I have used Flex Seal paste in household projects over the past few years and had extreme success.  Over the past month I removed cleaned and reseated 14 Portlights, and 4 Deck hatches on my sailboat.  I have full confidence that this will last long into the future. The price was a 50% of the previous 3m products I have used in the past.  It may be over kill but I used 12 tubes for my project. I used the RYOBI battery powered caulking gun, which made it very easy and controllable. I then used my fingertip (rubber gloves) for smoothing. I continually sprayed my gloved fingertip with alcohol and smoothed to a perfect finish.NOTE: I took the above pictures before trimming and smoothing the Flex Paste.

### ⭐⭐⭐⭐ 







  
  
    Believe the ads
  

*by D***H on Reviewed in the United States on 14 August 2023*

This stuff is nothing short of amazing. I needed a rubberized paste to fill some channels in high-density rubber matting. I tried several different (and much more expensive) products with minimal success. One of them required 24 hours of dry time for every 1/4" of depth and STILL didn't full dry after a week. We couldn't have that kind of downtime waiting for something to dry. I hesitated using Flexseal because the goofy guy in the boat didn't instill a high degree of credibility in me. Well, I was so wrong! This stuff is amazing! It sticks to virtually ANYTHING, dries very fast, and is very solid. My only complaint is it's almost impossible to get a smooth spread on it because it sticks to whatever you tool it with. But I've discovered if you let it dry just enough to not stick to wax paper, you can carefully put the wax paper over it and tool it to a more smooth appearance. Also, depending on what you are using it on, it helps to spray some Flexseal spray first, let it dry, and then put the paste over it. I heard this directly from Flexseal as a method of getting a super secure application. We have not had a single issue with doing this yet!

## 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, Black, Cartridge
- Flex Seal 2-Pack Black 17oz Stop Leaks Instantly, Waterproof Sealant Coating For Gutters, RV, Roof, Skylights, Windows
- 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, Black, Half-Quart

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**Shop now:** [https://www.desertcart.kr/products/526863387-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks](https://www.desertcart.kr/products/526863387-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: 2026-02-27*