---
product_id: 655814905
title: "FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals (4)"
brand: "prosoco"
price: "€ 233.62"
currency: EUR
in_stock: true
url: https://www.desertcart.fr/products/655814905-fastflash-waterproof-and-airtight-fluid-applied-flashing-membrane-trusted-by
store_origin: FR
region: France
---

# 100% waterproof & airtight seal cures in wet & rainy conditions bonds to 12+ common substrates FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals (4)

**Brand:** prosoco
**Price:** € 233.62
**Availability:** ✅ In Stock

## Summary

> 💼 Seal smart, build strong — the pro’s choice for airtight confidence.

## Quick Answers

- **What is this?** FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals (4) by prosoco
- **How much does it cost?** € 233.62 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/655814905-fastflash-waterproof-and-airtight-fluid-applied-flashing-membrane-trusted-by)

## Best For

- prosoco enthusiasts

## Why This Product

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

## Key Features

- • **All-Weather Application:** Apply confidently in rain or on damp surfaces—FastFlash cures and bonds even in wet conditions.
- • **Universal Bonding Power:** Adheres instantly to OSB, plywood, metal, concrete, vinyl, and more—no primer needed.
- • **Seamless Weatherproofing:** Create flawless, durable seals around rough openings and penetrations without flashing tapes.
- • **Long-Lasting UV Resistance:** Expose up to 12 months without yellowing, shrinking, or staining—maintain pristine protection.
- • **Integrated System Compatibility:** Works perfectly solo or with PROSOCO Joint & Seam Filler and AirDam for airtight, watertight performance.

## Overview

PROSOCO FastFlash is a fluid-applied flashing membrane that delivers a durable, waterproof, and airtight seal around rough openings, joints, and penetrations. Trusted by professionals, it bonds to a wide range of building materials without priming, cures in wet weather, and withstands UV exposure for up to 12 months without degradation. Ideal for seamless, weather-tight construction detailing.

## Description

PROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals (4)

## Features

- Seamlessly detail rough openings, fill joints and seams, counter-flash waterproofing and air barrier components and seal around penetrations without the need for flashing tapes.
- Use FastFlash independently or with compatible products PROSOCO Joint & Seam Filler or PROSOCO AirDam to prevent the unwanted movement of water and air through rough openings, joints, seams and penetrations. Produces a durable, weather-tight seal.
- Bonds to most common building materials without priming, such as OSB, plywood, glass mat gypsum, magnesium oxide board (MgO), wood, galvanized steel, stainless steel, vinyl, polyvinyl chloride (PVC), concrete, masonry and anodized aluminum substrates.
- Bonds and cures in wet weather, on damp substrates, and tolerates rain immediately after application. But, also breathable allowing damp surfaces to dry.
- May be fully exposed to UV and weather for up to 12 months. No shrinkage. No staining. No yellowing.
- This item contains 4 single sausages.

## Product Details

- **Brand:** Prosoco
- **Specific Uses For Product:** Masonry, Flooring, Wall Repair, Construction
- **Material:** Silicone
- **Item Form:** Liquid
- **Special Feature:** UV-Resistant, Wet-Weather Curing, Versatile Substrate Adhesion

## Images

![FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals (4) - Image 1](https://m.media-amazon.com/images/I/71tkeZKqmTL.jpg)

## Available Options

This product comes in different **Item Package Quantity** options.

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**Shop now:** [https://www.desertcart.fr/products/655814905-fastflash-waterproof-and-airtight-fluid-applied-flashing-membrane-trusted-by](https://www.desertcart.fr/products/655814905-fastflash-waterproof-and-airtight-fluid-applied-flashing-membrane-trusted-by)

---

*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-02-01*