---
product_id: 527684813
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, Quart"
brand: "flex paste"
price: "£105.58"
currency: GBP
in_stock: true
reviews_count: 5
category: "Flex Paste"
url: https://www.desertcart.co.uk/products/527684813-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks
store_origin: GB
region: United Kingdom
---

# Dries underwater Fully paintable finish Waterproof & UV resistant 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, Quart

**Brand:** flex paste
**Price:** £105.58
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it, paint it, forget it — Flex Paste has your repairs 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, Quart by flex paste
- **How much does it cost?** £105.58 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/527684813-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

- • **Built to Last:** UV resistant and rust-preventive for durable indoor and outdoor protection.
- • **Paint It Your Way:** Once cured, paint over it seamlessly to match any décor or project style.
- • **Freshness Locked In:** Innovative stay-fresh container prevents waste and extends sealing power.
- • **Seal with Confidence:** Creates a flexible, watertight rubber barrier that blocks air, water, and moisture.
- • **Versatile Application:** Perfect for walls, concrete, roofs, RVs, and even underwater repairs.

## Overview

Flex Paste is a premium waterproof, paintable rubberized putty designed to fill large gaps, cracks, and holes across multiple surfaces including drywall, concrete, and EPDM. Its unique formula works underwater, resists UV damage, and comes in a stay-fresh container to maximize usability. Ideal for professional-grade repairs on walls, roofs, RVs, and more, it offers a durable, flexible seal that can be painted to blend perfectly with your space.

## Description

Product Description

Review: We will see - Not as easy to apply as I would have liked but if my garage doesn’t flood inthe spring it’s worth it
Review: Perfect - Great coverage

## 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 | B084TDDCWW |
| Best Sellers Rank | #15,719 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #87 in Adhesive Caulk |
| Brand | Flex Paste |
| Brand Name | Flex Paste |
| Colour | Black |
| Compatible Material | Concrete |
| Country of Publication | USA |
| Customer Reviews | 4.0 out of 5 stars 1,853 Reviews |
| Included Components | Household Item |
| Item Dimensions | 12.7 x 10.8 x 10.8 Centimeters |
| Item Form | Paste |
| Item Type Name | Flex Paste 3 lb Tub (Black) |
| Item Weight | 1.36 kg |
| Item dimensions L x W x H | 12.7 x 10.8 x 10.8 Centimeters |
| Manufacturer | Swift Response, LLC |
| Manufacturer Part Number | PFSBLKR32 |
| Material | Rubber |
| Material Type | Rubber |
| Model | FLEX SEAL - PFSBLKR32 - BLACK |
| Number of Items | 1 |
| Style | Compact |
| Style Name | Compact |
| Surface Recommendation | Tub |
| UPC | 850010226811 |
| Unit Count | 1419.53 Milliliters |
| Water Resistance Level | Waterproof |

## Product Details

- **Material:** Rubber
- **Brand:** Flex Paste
- **Style:** Compact
- **Item Weight:** 3 Pounds
- **Item dimensions L x W x H:** 12.7 x 10.8 x 10.8 Centimeters

## 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, Quart - Image 1](https://m.media-amazon.com/images/I/51aauiVmPML.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, 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, Black, 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, Black, 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, Black, Quart - Image 5](https://m.media-amazon.com/images/I/71mAPcut5pL.jpg)

## Questions & Answers

**Q: Could you do several layers or one very thick layer to create a rubberized coating on something?**
A: Absolutely, just please remember that the thicker the final coating is, the longer the cure time will be. We highly advise creating the coating by adding layers to the surface rather than just one thick coat.

**Q: Any temperature requirement?**
A: Flex Paste can be applied in a wide range of temperatures from 0°F – 150ۜ°F. Once applied and fully cured it can withstand a wider range of temperatures from -40°F – 200°F.

**Q: Can this be used to fix crack in small ref/frezer**
A: Hi there. Thank you so much for reaching out. Flex Paste can withstand low temps like that in a freezer. Although some customers have found success with similar applications, it has not been tested for its safety when coming in contact with items used for food preparation, storing, or serving. Please contact us if you have any additional questions. We're always happy to help. Flex On!

**Q: can flex paste be painted ?**
A: Yes. Must be fully cured before painting.

## Customer Reviews

### ⭐⭐⭐⭐⭐ We will see
*by M***N on 30 November 2020*

Not as easy to apply as I would have liked but if my garage doesn’t flood inthe spring it’s worth it

### ⭐⭐⭐⭐⭐ Perfect
*by H***D on 14 December 2024*

Great coverage

### ⭐⭐⭐⭐⭐ Flex paste
*by F***D on 21 December 2020*

Super great stuff works really great for sealing up stuff ....a little on the pricey side tho

## 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, Black, 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
- Flex Seal Liquid, 16 oz, Clear, Liquid Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry

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**Shop now:** [https://www.desertcart.co.uk/products/527684813-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks](https://www.desertcart.co.uk/products/527684813-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: 2026-07-04*