---
product_id: 741853145
title: "PROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals"
brand: "prosoco"
price: "€ 83.06"
currency: EUR
in_stock: true
category: "Prosoco"
url: https://www.desertcart.hr/products/741853145-prosoco-fastflash-waterproof-and-airtight-fluid-applied-flashing-membrane-trusted
store_origin: HR
region: Croatia
---

# 100% waterproof seal Cures in wet & rainy conditions Bonds to 12+ common substrates PROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals

**Brand:** prosoco
**Price:** € 83.06
**Availability:** ✅ In Stock

## Summary

> 💧 Seal the deal with PROSOCO FastFlash — where waterproof meets worry-free!

## Quick Answers

- **What is this?** PROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals by prosoco
- **How much does it cost?** € 83.06 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/741853145-prosoco-fastflash-waterproof-and-airtight-fluid-applied-flashing-membrane-trusted)

## 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

- • **Pro-Grade Efficiency:** Simplify window and joint flashing with a fluid-applied membrane trusted by industry experts.
- • **No Shrinkage, No Stains:** Maintains a clean, professional finish with zero yellowing or cracking over time.
- • **Universal Bonding Power:** Seamlessly adheres to OSB, plywood, metal, concrete, and more without priming.
- • **Flawless Weatherproofing:** Create a durable, airtight barrier that stands up to rain, wind, and UV exposure for up to 12 months.
- • **Rain or Shine Application:** Apply confidently on damp surfaces or in wet weather—no delays, no compromises.

## Overview

PROSOCO FastFlash is a professional-grade, fluid-applied flashing membrane that delivers a waterproof, airtight seal across a wide range of building materials. It cures quickly even in wet conditions, resists UV exposure for up to 12 months without shrinking or staining, and eliminates the complexity of traditional wrap and tape methods, making it the go-to solution for flawless window and joint flashing.

## Description

PROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals: desertcart.com: Tools & Home Improvement

## Features

- To install windows, avoid the “origami” of building wrap and tapes – because if you don’t get it right, it will leak. This fluid-applied is the high-performance product used by professionals to get the job done right.
- 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00OBUFLCW |
| Best Sellers Rank | #130,572 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #55 in Roof Flashings |
| Brand Name | Prosoco |
| Color | Red |
| Compatible Material | Alloy Steel |
| Container Type | Tube, Sausage |
| Customer Reviews | 4.8 4.8 out of 5 stars (255) |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Type Name | Fastflash |
| Item Weight | 1 Pounds |
| Manufacturer | PROSOCO |
| Material Type | Plastic |
| Model | 70400-CASE |
| Number of Pieces | 20 |
| Part Number | PRS-70400-SAUSAGE |
| UPC | 653429020113 653429020168 |
| Unit Count | 20.0 Fluid Ounces |
| Volume | 348 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Prosoco
- **Color:** Red
- **Item Form:** Paste
- **Item Package Quantity:** 1
- **Material:** Plastic

## Images

![PROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals - Image 1](https://m.media-amazon.com/images/I/71EwJ6IjeyL.jpg)

## Available Options

This product comes in different **Number Of Items** options.

## Frequently Bought Together

- PROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals
- Albion Engineering Company B12S20 B-Line Manual Sausage Caulking Gun, 20 oz, 12:1 Drive
- Prosoco R-Guard Joint and Seam Filler

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**Shop now:** [https://www.desertcart.hr/products/741853145-prosoco-fastflash-waterproof-and-airtight-fluid-applied-flashing-membrane-trusted](https://www.desertcart.hr/products/741853145-prosoco-fastflash-waterproof-and-airtight-fluid-applied-flashing-membrane-trusted)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-07-04*