---
product_id: 267848373
title: "Flex Paste, 1 lb Jar, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs"
brand: "flex paste"
price: "1369 kr"
currency: NOK
in_stock: true
category: "Flex Paste"
url: https://www.desertcart.no/products/267848373-flex-paste-1-lb-jar-black-waterproof-paintable-putty-spackle
store_origin: NO
region: Norway
---

# Dries underwater, works in wet conditions Super thick, fills large gaps instantly Waterproof & UV resistant seal Flex Paste, 1 lb Jar, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs

**Brand:** flex paste
**Price:** 1369 kr
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it. Paint it. Forget it. The ultimate fix for every crack and crevice.

## Quick Answers

- **What is this?** Flex Paste, 1 lb Jar, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs by flex paste
- **How much does it cost?** 1369 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/267848373-flex-paste-1-lb-jar-black-waterproof-paintable-putty-spackle)

## 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

- • **Seal Like a Pro:** Creates a flexible, rubberized barrier that blocks air, water, and moisture for lasting protection.
- • **Stay Fresh Tech:** Innovative airtight container locks in freshness, ensuring no waste and maximum sealing power.
- • **Paint It Your Way:** Fully paintable once cured, blending seamlessly with your décor while preventing rust and UV damage.
- • **DIY’s Best Friend:** Ideal for everything from home repairs to RV, marine, and garden projects—get it done with confidence.
- • **Built for Every Surface:** Compatible with wood, metal, concrete, glass, and more—perfect for indoor and outdoor fixes.

## Overview

Flex Paste is a premium 1 lb black waterproof putty that forms a durable, flexible, and UV-resistant seal on multiple surfaces. It fills large gaps and cracks instantly, works underwater, and comes in a stay-fresh container to maximize shelf life. Perfect for professional-grade repairs and DIY projects alike, it’s paintable and compatible with a wide range of materials including concrete, metal, wood, and more.

## Description

Flex Paste is an excellent waterproof sealant. It can be used on windows, doors, vents, and thresholds. It's easy-to-use and perfect for all types of indorr and outdoor repairs. It's even greawt for DIY projects. Crafts, hobbies, and so much more.

## 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 | B084TDS8S5 |
| Best Sellers Rank | #60,542 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #67 in Putty Knives |
| Brand Name | Flex Paste |
| Color | Black |
| Compatible Material | Wood, Glass, Tile, Concrete, Aluminum, Metal, Brick, Stucco, Masonry, Copper, Fabric, Fiberglass, Ceramic, Porcelain, Natural Stones, Roofing, Pvc, Eifs, Cspe, Epdm, Hypalon Polyurethanes |
| Customer Reviews | 3.8 3.8 out of 5 stars (3,165) |
| Included Components | Household Item |
| Item Dimensions | 10.8 x 10.8 x 6.4 centimeters |
| Item Form | Paste |
| Item Type Name | Flex Paste 1 lb Jar (Black) |
| Item Weight | 1 Pounds |
| Manufacturer | Swift Response, LLC |
| Material Type | Rubber |
| Model | FLEX SEAL - PFSBLKR16 - BLACK |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | PFSBLKR16 |
| Style Name | 1 lb Black |
| Supported Standards | ASTM C-920 |
| Surface Recommendation | Windows,Doors |
| UPC | 850010226804 |
| Unit Count | 1 Count |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Flex Paste
- **Item dimensions L x W x H:** 10.8 x 10.8 x 6.4 centimeters
- **Item weight:** 1 Pounds
- **Material:** Rubber
- **Style:** 1 lb Black

## Images

![Flex Paste, 1 lb Jar, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - Image 1](https://m.media-amazon.com/images/I/71Avii-yA1L.jpg)

## Available Options

This product comes in different **Color** 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, Black, Half-Quart
- 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, Cartridge
- Flex Seal 2-Pack Black 17oz Stop Leaks Instantly, Waterproof Sealant Coating For Gutters, RV, Roof, Skylights, Windows

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**Shop now:** [https://www.desertcart.no/products/267848373-flex-paste-1-lb-jar-black-waterproof-paintable-putty-spackle](https://www.desertcart.no/products/267848373-flex-paste-1-lb-jar-black-waterproof-paintable-putty-spackle)

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*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-09-18*