---
product_id: 234733057
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, Cartridge"
brand: "flex paste"
price: "€ 31.39"
currency: EUR
in_stock: true
reviews_count: 13
category: "Flex Paste"
url: https://www.desertcart.it/products/234733057-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks
store_origin: IT
region: Italy
---

# Fully paintable finish Waterproof & dries underwater UV resistant & corrosion blocker 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, Cartridge

**Brand:** flex paste
**Price:** € 31.39
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it, save it, style it — the ultimate fix-it flex!

## 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, Cartridge by flex paste
- **How much does it cost?** € 31.39 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/234733057-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:** Once cured, paint over it to match any surface while preventing rust and UV damage.
- • **Fill Large Gaps Instantly:** Super thick paste clings and fills cracks, holes, and gaps with ease and durability.
- • **Seal & Protect Like a Pro:** Creates a flexible, watertight rubberized barrier that blocks air, water, and moisture.
- • **Apply Anywhere, Even Underwater:** Unique formula cures underwater, perfect for roofs, RVs, and concrete repairs.
- • **Stay Fresh Container Technology:** Air-tight packaging locks in freshness to prevent waste and extend sealing power.

## Overview

Flex Paste is a premium waterproof, paintable putty designed to fill and seal gaps, cracks, and holes on multiple surfaces including drywall, concrete, and EPDM. Its advanced rubberized formula cures even underwater, providing a durable, flexible barrier that blocks air, water, and UV damage. Packaged in an innovative stay-fresh container, it ensures long-lasting sealing power with zero waste, making it the go-to solution for professional-grade repairs on 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, Cartridge - desertcart.com

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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B084TCZLQQ |
| Best Sellers Rank | #19,274 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #53 in Hardware Sealers |
| Brand | Flex Paste |
| Color | White |
| Date First Available | February 14, 2020 |
| Department | Unisex-Adult |
| Item Form | Paste |
| Item Weight | 9 ounces |
| Item dimensions L x W x H | 11.25 x 3 x 3 inches |
| Item model number | PFSWHTR10 |
| Manufacturer | Swift Response, LLC |
| Material | Rubber |
| Number of Items | 1 |
| Product Dimensions | 11.25 x 3 x 3 inches |
| Style | 9 oz White |
| Surface Recommendation | Windows,Doors |
| UPC | 850010226866 |
| Unit Count | 9.0 Ounce |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Flex Paste
- **Item Weight:** 9 Ounces
- **Item dimensions L x W x H:** 11.25 x 3 x 3 inches
- **Material:** Rubber
- **Style:** 9 oz White

## 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, Cartridge - Image 1](https://m.media-amazon.com/images/I/61nIVkJXywL.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, Cartridge - Image 2](https://m.media-amazon.com/images/I/61QSP-7wB2L.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, 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, White, 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, White, Cartridge - Image 5](https://m.media-amazon.com/images/I/810+KPaaYuL.jpg)

## Available Options

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

## 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, Cartridge
- Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, Clear, 6.6 oz, 1-Pack

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.it/products/234733057-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks](https://www.desertcart.it/products/234733057-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks)

---

*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-03-03*