---
product_id: 671663767
title: "Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 2-Pack"
brand: "flex seal"
price: "€ 66.75"
currency: EUR
in_stock: true
reviews_count: 8
category: "Flex Seal"
url: https://www.desertcart.hr/products/671663767-flex-caulk-waterproof-and-weatherproof-hybrid-polymer-sealant-strong-paintable
store_origin: HR
region: Croatia
---

# Fully Paintable for Seamless Finish 100% Waterproof & Weatherproof Adjustable Trigger Flow Nozzle, No Caulk Gun Needed Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 2-Pack

**Brand:** flex seal
**Price:** € 66.75
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal Smart, Live Confident—The Last Caulk You'll Ever Need!

## Quick Answers

- **What is this?** Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 2-Pack by flex seal
- **How much does it cost?** € 66.75 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/671663767-flex-caulk-waterproof-and-weatherproof-hybrid-polymer-sealant-strong-paintable)

## Best For

- flex seal enthusiasts

## Why This Product

- Trusted flex seal brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Customizable Finish:** Fully paintable to blend seamlessly with your décor, ensuring professional results every time.
- • **Durability That Lasts:** Won’t shrink, crack, or become brittle—UV and chemical resistant to keep your surfaces flawless over time.
- • **Ultimate All-Weather Protection:** Advanced hybrid polymer formula seals out water, air, and moisture—perfect for indoor and outdoor use, rain or shine.
- • **Versatile Surface Compatibility:** Adheres to virtually any surface, wet or dry—from windows and doors to RVs, roofs, and marine applications.
- • **Effortless Precision Application:** No caulk gun required—just snap, squeeze, and seal with the adjustable trigger flow nozzle for mess-free control.

## Overview

Flex Caulk is a cutting-edge hybrid polymer sealant designed for both indoor and outdoor use. Its waterproof, weatherproof formula offers superior adhesion on wet or dry surfaces without shrinking or cracking. Featuring an adjustable trigger flow nozzle, it eliminates the need for a caulk gun, making application effortless and precise. Fully paintable and UV resistant, this 4 oz 2-pack is ideal for sealing everything from windows and doors to marine and automotive surfaces, delivering professional-grade durability and finish.

## Description

Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 2-Pack: desertcart.com: Industrial & Scientific

Review: Absolutely incredible product 5 Stars! - I am no handyman and definitely not good at DIY stuff around the House, but this practical and excellent product gave me the confidence to seal up my Window in my Basement and it worked flawlessly! I can’t say enough good things about this product! It’s easy to use and does exactly as the product claims and there was virtually no mess!
Review: Very easy to use - If you follow the instructions it should work easy peasy. I bought an actual caulk gun with caulk and I hate it. This flex seal product works great It's super easy.

## Features

- So easy to use.
- No caulk gun needed.
- Adjustable Trigger Flow Nozzle.
- Advanced hybrid polymer formulation.
- Snap & Save cap eliminates waste.
- Seals out water, air, and moisture.
- Adheres to virtually any surface, wet or dry.
- Won’t shrink, crack, or become brittle.
- UV and chemical resistant.
- Fully paintable.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DK9X7YW3 |
| Best Sellers Rank | #239 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Adhesive Caulk |
| Brand | Flex Seal |
| Color | White |
| Date First Available | October 18, 2024 |
| Full Cure Time | 10 Minutes |
| Item Form | Liquid |
| Item Weight | 1.16 pounds |
| Liquid Volume | 8 Fluid Ounces |
| Manufacturer | Swift Response, LLC |
| Number of Items | 1 |
| Product Dimensions | 8.75 x 4.48 x 2.24 inches |
| Surface Recommendation | Tile, Pipe, Counter Top, Window, Door, Sink, Tub, Walls, Gutter |
| UPC | 810129871852 |
| Unit Count | 8.0 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Flex Seal
- **Color:** White
- **Full Cure Time:** 10 Minutes
- **Item Weight:** 1.16 Pounds
- **Liquid Volume:** 8 Fluid Ounces

## Images

![Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 2-Pack - Image 1](https://m.media-amazon.com/images/I/7145eBJ-RPL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Absolutely incredible product 5 Stars!
*by J***T on November 22, 2025*

I am no handyman and definitely not good at DIY stuff around the House, but this practical and excellent product gave me the confidence to seal up my Window in my Basement and it worked flawlessly! I can’t say enough good things about this product! It’s easy to use and does exactly as the product claims and there was virtually no mess!

### ⭐⭐⭐⭐⭐ Very easy to use
*by K***Y on January 6, 2026*

If you follow the instructions it should work easy peasy. I bought an actual caulk gun with caulk and I hate it. This flex seal product works great It's super easy.

### ⭐⭐⭐⭐ Excellent Caulking Product
*by G***S on July 16, 2024*

If you want to re-caulk your bathtub, Flex Caulk is an excellent product. I’ve never done caulking. So I thought I’d try it myself using this product. I bought a caulk scraper n Amazon for under $10. That is essential to remove the old, ugly, blackened caulk. Yes, that’s some hard work which took about 30 minutes of scraping and washing. But once that was done, the flex caulk worked really well. You set the bottle for the lowest bead size. And you just press and move the bottle along the gap where the caulk should go. No, I didn’t do a super professional job. But overall it looks great and much better than before! The problem I had was not consistently just moving across the gap. I stopped a few times, and the caulk can build up in certain spots. Then you need a paper towel to remove it. And you need to wear gloves as caulk is very messy. But if you just glide the bottle and press you will get a beautiful bead. It dries fast. They say 24 hours for complete hardening. And now 90% of my caulking looks great. But there are a few spots where it got a little messy. Overall, I am very pleased with this flex caulk!

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**Shop now:** [https://www.desertcart.hr/products/671663767-flex-caulk-waterproof-and-weatherproof-hybrid-polymer-sealant-strong-paintable](https://www.desertcart.hr/products/671663767-flex-caulk-waterproof-and-weatherproof-hybrid-polymer-sealant-strong-paintable)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-23*