---
product_id: 214989979
title: "Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack"
brand: "flex paste"
price: "₩43984"
currency: KRW
in_stock: true
reviews_count: 13
category: "Flex Paste"
url: https://www.desertcart.kr/products/214989979-flex-paste-rubberized-waterproof-sealant-paste-white-half-quart-1
store_origin: KR
region: South Korea
---

# Fully paintable & UV resistant Works & dries underwater Super thick rubber paste fills large gaps Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack

**Brand:** flex paste
**Price:** ₩43984
**Availability:** ✅ In Stock

## Summary

> 💪 Seal it. Paint it. Forget it. Waterproof repairs that last.

## Quick Answers

- **What is this?** Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack by flex paste
- **How much does it cost?** ₩43984 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/214989979-flex-paste-rubberized-waterproof-sealant-paste-white-half-quart-1)

## 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

- • **Gap-Filling Power:** Super thick paste instantly fills large cracks, holes, and gaps for durable repairs.
- • **Custom Finish Ready:** Paintable once cured, letting you match any surface and protect against rust and UV damage.
- • **Seal with Confidence:** Creates a flexible, watertight rubber barrier that blocks air, water, and moisture.
- • **Versatile & Reliable:** Perfect for indoor/outdoor use on roofs, RVs, marine, concrete, and more—made in the USA.
- • **Underwater Application:** Unique formula allows application and curing even underwater—no project too wet.

## Overview

Flex Paste Rubberized Waterproof Sealant Paste is a super thick, white rubberized compound designed to fill large cracks and holes with a flexible, watertight seal. It uniquely works and cures underwater, is fully paintable, UV resistant, and ideal for a wide range of indoor and outdoor repair projects including roofs, RVs, marine, and concrete surfaces. Packaged in a freshness-locking container to maximize shelf life, this USA-made sealant offers durable protection against air, water, moisture, rust, and corrosion.

## Description

Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack | Super thick rubber paste, fills gaps, cracks, holes, works underwater, paintable, UV resistant, walls, drywall, roof, RV - desertcart.com

Review: Great product! - Great product! Worked well when I needed to reattach a tile in my inground pool. Would recommend.
Review: Tough stuff! - I used this to patch together two pieces of EPDM pond lining. 3 months later it's working beautifully. I also used it to create a 4 inch high stone "wall" for the waterfall to spill over. That also worked very nicely. It does apply well under water [I tested that] but I initially applied it on completely dry lining and dry stones. Left it alone for 3 days just to be sure it cured and there was no disappointment. The only problem was the packaging. I used 2 containers and each was only half useable. The middle of the paste was pliable but somehow the outer rims of paste were too hardened to use. Basically, between the 2 containers, I was only able to use what amounted to 1 container. Other than that, I'll be using this paste again. It's very strong, really seals, and lives up to all the claims.

## 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 | B084TDJLKT |
| Best Sellers Rank | #10,505 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #39 in Hardware Sealers |
| Brand | Flex Paste |
| Brand Name | Flex Paste |
| Color | White |
| Compatible Material | Aluminum, Ceramic, Glass, Metal, Polyvinyl Chloride, Wood |
| Customer Reviews | 4.0 out of 5 stars 6,070 Reviews |
| Included Components | Household Item |
| Item Dimensions | 4.25 x 4.25 x 2.5 inches |
| Item Form | Paste |
| Item Highlight | Super thick rubber paste, fills gaps, cracks, holes, works underwater, paintable, UV resistant, walls, drywall, roof, RV |
| Item Type Name | Flex Paste 1 lb Jar (White) |
| Item Weight | 16 ounces |
| Item dimensions L x W x H | 4.25 x 4.25 x 2.5 inches |
| Manufacturer | Swift Response, LLC |
| Material | Rubber |
| Material Type | Rubber |
| Model | FLEX SEAL - PFSWHTR16 - WHITE |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | PFSWHTR16 |
| Style | 1 lb White |
| Style Name | 1 lb White |
| Surface Recommendation | Roof |
| UPC | 850010226835 |
| Unit Count | 16 Ounce |
| Warranty Description | 1 Year Limited |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Flex Paste
- **Item Weight:** 16 ounces
- **Item dimensions L x W x H:** 4.25 x 4.25 x 2.5 inches
- **Material:** Rubber
- **Style:** 1 lb White

## Images

![Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack - Image 1](https://m.media-amazon.com/images/I/71-IKakfInL.jpg)
![Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack - Image 2](https://m.media-amazon.com/images/I/813DZGeMoJL.jpg)
![Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack - Image 3](https://m.media-amazon.com/images/I/7196YxAgJAL.jpg)
![Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack - Image 4](https://m.media-amazon.com/images/I/81VyKS9sU8L.jpg)
![Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack - Image 5](https://m.media-amazon.com/images/I/91-QYZY4UNL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can this be used on flexible surfaces?**
A: Depends on how flexible. It has to be able to adhere to the surface. It cures the same as rubber in a tire. There is some give.

**Q: Seal wet surface**
A: Hello there. That's an excellent question. Flex Paste can be applied to dry or wet surfaces and even underwater. It does not dissolve, creating a watertight seal. Thank you very much for reaching out to us with your question. Please write to us anytime. We're always happy to help. Flex On!

**Q: Flex seal pasta can it be used on curved surfaces?**
A: Yes it can be used on any curved and even upside down surface but if ordering on-line, if you open the can and the edges are turning hard return it ASAP because chances is it's hard on bottom as-well and you don't get your money worth

**Q: Can I use in a in ground swimming pool to repair a crack**
A: Yes, it can be applied underwater. It won’t dissolve or wash away. It even dries underwater! Flex Paste is easy to use. With a putty knife, trowel, spatula, roller, or stiff brush remove a smooth even layer of material from the top of the tub. Scooping deeply into the tub may cause air pockets which can dry FLEX PASTE.  Apply a generous amount using a smooth sweeping motion.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product!
*by G***. on August 21, 2026*

Great product! Worked well when I needed to reattach a tile in my inground pool. Would recommend.

### ⭐⭐⭐⭐⭐ Tough stuff!
*by C***E on October 4, 2024*

I used this to patch together two pieces of EPDM pond lining. 3 months later it's working beautifully. I also used it to create a 4 inch high stone "wall" for the waterfall to spill over. That also worked very nicely. It does apply well under water [I tested that] but I initially applied it on completely dry lining and dry stones. Left it alone for 3 days just to be sure it cured and there was no disappointment. The only problem was the packaging. I used 2 containers and each was only half useable. The middle of the paste was pliable but somehow the outer rims of paste were too hardened to use. Basically, between the 2 containers, I was only able to use what amounted to 1 container. Other than that, I'll be using this paste again. It's very strong, really seals, and lives up to all the claims.

### ⭐⭐⭐⭐ Works under any condition
*by B***N on September 16, 2024*

I want to rate this product lower because this is the second one I’ve bought that had a hard 2/3” top so 10-15% of it is trash. This product is also very hard to work with. This will not spread smooth and is very messy. This product will only patch a small area. I used the entire tub for this small patch over. However, I am rating this product a 4 star because there is not another product that I know of like it. This is the second time patching my rooftop tent due to the tent getting a crack in it. This product went on and cured in the very moist fog. It then rained and still cured. This product lasted through a very cold winter through heavy snow and some rain. This product took abuse from heavy 4x4ing and flexing. It wasn’t until it was well over 100f and with some flexing this product split. I bought this second tub to patch the crack.

## 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, Half-Quart
- Flex Seal, 14 oz, Clear, Stop Leaks Instantly, Transparent Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More

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**Shop now:** [https://www.desertcart.kr/products/214989979-flex-paste-rubberized-waterproof-sealant-paste-white-half-quart-1](https://www.desertcart.kr/products/214989979-flex-paste-rubberized-waterproof-sealant-paste-white-half-quart-1)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-09-12*