---
product_id: 781010533
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, Half-Quart"
brand: "flex paste"
price: "4158 kr"
currency: ISK
in_stock: true
url: https://www.desertcart.is/products/781010533-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks
store_origin: IS
region: Iceland
---

# Fully Paintable Finish Dries & Works Underwater 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, Half-Quart

**Brand:** flex paste
**Price:** 4158 kr
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it, paint it, forget it – Flex Paste has you 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, Black, Half-Quart by flex paste
- **How much does it cost?** 4158 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/781010533-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

- • **Customizable Finish:** Paint over once cured to match any surface and protect against rust and UV damage
- • **Stay Fresh Container:** Locks in freshness to maximize sealant longevity and prevent waste
- • **Super Thick Fill Power:** Instantly fills large gaps, cracks, and holes with durable adhesion
- • **Underwater Application:** Apply and cure even underwater for unmatched versatility
- • **Ultimate Waterproof Barrier:** Creates a flexible, rubberized shield that blocks air, water, and moisture

## Overview

Flex Paste is a premium waterproof, paintable putty and sealant designed to fill and protect large gaps, cracks, and holes across multiple surfaces. Its innovative stay-fresh container preserves product integrity, while its flexible, rubberized formula blocks air, water, and UV damage. Suitable for indoor and outdoor use, including underwater applications, it offers a durable, customizable finish ideal for professional-grade repairs on walls, roofs, RVs, and more.

## 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
- 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

## 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, Half-Quart - Image 1](https://m.media-amazon.com/images/I/71Avii-yA1L.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, Half-Quart - Image 2](https://m.media-amazon.com/images/I/81yaLw1mdAL.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, Half-Quart - Image 3](https://m.media-amazon.com/images/I/91TzUOYxWfL.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, Half-Quart - Image 4](https://m.media-amazon.com/images/I/91rCsG0fFFL.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, Half-Quart - Image 5](https://m.media-amazon.com/images/I/81X0MV1+SrL.jpg)

## Available Options

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

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**Shop now:** [https://www.desertcart.is/products/781010533-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks](https://www.desertcart.is/products/781010533-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-18*