---
product_id: 214989979
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, Half-Quart"
brand: "flex paste"
price: "£34.24"
currency: GBP
in_stock: true
url: https://www.desertcart.co.uk/products/214989979-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks
store_origin: GB
region: United Kingdom
---

# 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, White, Half-Quart

**Brand:** flex paste
**Price:** £34.24
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it. Paint it. Forget it. The last fix you’ll ever need.

## 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, Half-Quart by flex paste
- **How much does it cost?** £34.24 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/214989979-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

- • **Paint It Your Way:** Once cured, seamlessly paint over to match any surface, enhancing aesthetics while preventing rust and UV damage.
- • **Freshness Locked Container:** Innovative airtight packaging keeps your paste fresh and ready, eliminating waste and extending shelf life.
- • **Ultimate Waterproof Defense:** Creates a flexible, rubberized barrier that blocks air, water, and moisture for lasting protection.
- • **Versatile Repair Powerhouse:** Ideal for walls, roofs, RVs, concrete, and more—fills large gaps, cracks, and holes with ease and durability.
- • **Apply Anywhere, Even Underwater:** Unique formula cures underwater, perfect for indoor and outdoor repairs without limits.

## Overview

Flex Paste is a premium waterproof, paintable putty designed to fill and seal gaps, cracks, and holes across multiple surfaces including drywall, concrete, and metal. Its unique rubberized formula works underwater, resists UV damage, and comes in a freshness-locking container to maximize usability. Perfect for professional-grade repairs on roofs, RVs, and more, it offers a durable, flexible barrier that can be painted over for a flawless finish.

## 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, Half-Quart - 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
- 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 | #18,481 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #65 in Hardware Sealers |
| Brand Name | Flex Paste |
| Color | White |
| Compatible Material | Aluminum, Ceramic, Glass, Metal, Polyvinyl Chloride, Wood |
| Customer Reviews | 4.0 4.0 out of 5 stars (6,021) |
| Included Components | Household Item |
| Item Dimensions | 4.25 x 4.25 x 2.5 inches |
| Item Form | Paste |
| Item Type Name | Flex Paste 1 lb Jar (White) |
| Item Weight | 1 Pounds |
| Manufacturer | Swift Response, LLC |
| Material Type | Rubber |
| Model | FLEX SEAL - PFSWHTR16 - WHITE |
| Number of Items | 1 |
| Part Number | PFSWHTR16 |
| Style Name | 1 lb White |
| Surface Recommendation | Roof |
| UPC | 850010226835 |
| Unit Count | 16.0 Ounce |
| Warranty Description | 1 Year Limited |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Flex Paste
- **Item Weight:** 1 Pounds
- **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, 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 - Image 1](https://m.media-amazon.com/images/I/41FUjuvggQL.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, Half-Quart - Image 2](https://m.media-amazon.com/images/I/71id8yOrn8L.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, Half-Quart - Image 3](https://m.media-amazon.com/images/I/71yd+Gnyk+L.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, Half-Quart - Image 4](https://m.media-amazon.com/images/I/71xvXuxwrIL.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, Half-Quart - Image 5](https://m.media-amazon.com/images/I/71mAPcut5pL.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.

## 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.co.uk/products/214989979-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks](https://www.desertcart.co.uk/products/214989979-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-07-12*