---
product_id: 234733057
title: "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 | Fills gaps, cracks and holes on walls, drywall, EPDM, concrete, roofs and RVs, UV resistant, can be applied underwater"
brand: "flex paste"
price: "€ 45.04"
currency: EUR
in_stock: true
category: "Flex Paste"
url: https://www.desertcart.hr/products/234733057-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks-holes-block
store_origin: HR
region: Croatia
---

# Fully Paintable Finish Dries & Works Underwater Waterproof & UV Resistant Seal 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 | Fills gaps, cracks and holes on walls, drywall, EPDM, concrete, roofs and RVs, UV resistant, can be applied underwater

**Brand:** flex paste
**Price:** € 45.04
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it, paint it, forget it — the last fix you’ll ever need!

## Quick Answers

- **What is this?** 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 | Fills gaps, cracks and holes on walls, drywall, EPDM, concrete, roofs and RVs, UV resistant, can be applied underwater by flex paste
- **How much does it cost?** € 45.04 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/234733057-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks-holes-block)

## 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

- • **Customizable Finish:** Paint over once cured to match any décor while preventing rust, corrosion, and UV damage.
- • **Ultimate Waterproof Barrier:** Creates a flexible, rubberized shield that blocks air, water, and moisture—even underwater applications.
- • **Super Thick, Gap-Filling Power:** Instantly fills large cracks, holes, and gaps with a durable, clingy paste that won’t sag or shrink.
- • **Stay Fresh Container Technology:** Locks in freshness, prevents waste, and extends sealing power for long-lasting repairs.
- • **Versatile Surface Compatibility:** Seals and protects on walls, drywall, concrete, EPDM, roofs, RVs, and more—your all-in-one fix-it solution.

## Overview

Flex Paste is a premium waterproof, paintable putty designed to fill and seal gaps, cracks, and holes across multiple surfaces. Featuring a stay-fresh container, it locks out air to maintain peak performance. Its thick, rubberized formula works even underwater, creating a flexible, UV-resistant barrier that prevents water, air, rust, and corrosion. Ideal for walls, roofs, RVs, and more, it cures to a paintable finish for seamless repairs that blend perfectly with your space.

## 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

## 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 | #8,798 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #31 in Hardware Sealers |
| Brand Name | Flex Paste |
| Color | White |
| Compatible Material | Brick, Ceramic, Concrete, Fabric, Glass, Metal, Plastic, Porcelain, Stone, Wood |
| Customer Reviews | 4.0 4.0 out of 5 stars (6,029) |
| Included Components | Item |
| Item Dimensions | 11.25 x 3 x 3 inches |
| Item Form | Paste |
| Item Type Name | Flex Seal PFSWHTR10 Flex Paste 9 Oz. Cartridge - White |
| Item Weight | 9 Ounces |
| Manufacturer | Swift Response, LLC |
| Material Type | Rubber |
| Model | PFSWHTR10 |
| Number of Items | 1 |
| Part Number | PFSWHTR10 |
| Style Name | 9 oz White |
| Surface Recommendation | Windows,Doors |
| UPC | 850010226866 |
| Unit Count | 9.0 Ounce |
| Warranty Description | 1 Year Limited |
| 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

![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 | Fills gaps, cracks and holes on walls, drywall, EPDM, concrete, roofs and RVs, UV resistant, can be applied underwater - Image 1](https://m.media-amazon.com/images/I/51YzOCxfEhL.jpg)

## Available Options

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

## 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

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

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-07-25*