---
product_id: 603226759
title: "Hilti Firestop Block CFS-BL"
brand: "hilti"
price: "1086 kr"
currency: DKK
in_stock: true
reviews_count: 2
category: "Hilti"
url: https://www.desertcart.dk/products/603226759-hilti-firestop-block-cfs-bl
store_origin: DK
region: Denmark
---

# Commercial & residential ready 8" x 5¼" firestop precision Moldable firestop putty barrier Hilti Firestop Block CFS-BL

**Brand:** hilti
**Price:** 1086 kr
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the deal on safety — don’t let fire catch you off guard!

## Quick Answers

- **What is this?** Hilti Firestop Block CFS-BL by hilti
- **How much does it cost?** 1086 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/603226759-hilti-firestop-block-cfs-bl)

## Best For

- hilti enthusiasts

## Why This Product

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

## Key Features

- • **Dual-Use Versatility:** Engineered for both commercial and residential fire safety needs
- • **Precision-Fit Firestop:** Perfectly sized 8" x 5¼" block for seamless electrical box protection
- • **Advanced Moldable Putty:** Innovative firestop putty forms a resilient barrier against flames and smoke
- • **Toxic Gas & Smoke Shield:** Blocks hazardous gases and smoke, enhancing building safety compliance
- • **Lightweight & Easy Install:** Weighs just 354g for quick, hassle-free application without extra tools

## Overview

Hilti Firestop Block CFS-BL is a precision-sized, moldable firestop solution designed to protect electrical boxes in fire-resistive walls. Suitable for both commercial and residential use, it effectively blocks flames, toxic gases, and smoke, ensuring enhanced safety and compliance with fire protection standards.

## Description

These blocks can be used for commercial and residential applications. They are comprised of moldable firestop putty and are designed to help protect electrical outlet and switch boxes from the passage of flames, toxic gases, smoke and temperature.

Review: It didn't work for what we needed it not moldable. Probably more I me .I returned it and was very happy how fast they took care of my refund 5 stars to them for that
Review: Just I was going looking for!

## Features

- Hilti
- Firestop Block
- Approximately 8" x 51/4"
- For firestopping electrical boxes in fire resistive walls.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01MT7UWCF |
| Batteries Required? | No |
| Batteries included? | No |
| Colour | Gray |
| Customer Reviews | 3.7 3.7 out of 5 stars (6) |
| Date First Available | 10 Jan. 2017 |
| Head Style | Hex |
| Item Package Quantity | 1 |
| Item Weight | 354 g |
| Item model number | CFS-BL |
| Manufacturer | Hilti |
| Material | Multiple |
| Number of Pieces | 1 |
| Part number | CFS-BL |
| Product Dimensions | 13.67 x 20.02 x 5.08 cm; 353.8 g |

## Product Details

- **Exterior finish:** Gray coating or material
- **Head style:** Hex
- **Manufacturer grade:** Grade CFS
- **Material:** Multiple
- **Thread size:** 1/4"-20 UNF

## Images

![Hilti Firestop Block CFS-BL - Image 1](https://m.media-amazon.com/images/I/41GniBuW8DL.jpg)
![Hilti Firestop Block CFS-BL - Image 2](https://m.media-amazon.com/images/I/81pVFDz6OQL.jpg)

## Questions & Answers

**Q: Why does the product description say "comprised" where it should have said "composed?"**
A: amazon mistake they  describe the item

## Customer Reviews

### ⭐⭐⭐⭐ Review
*by P***Y on 29 September 2022*

It didn't work for what we needed it not moldable. Probably more I me .I returned it and was very happy how fast they took care of my refund 5 stars to them for that

### ⭐⭐⭐⭐⭐ Review
*by M***. on 12 January 2020*

Just I was going looking for!

## Frequently Bought Together

- Hilti Firestop Block CFS-BL
- HIlti 2101531 FS-ONE MAX 10.1oz Tube (1 Tube) firestop fire Protection Systems

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**Shop now:** [https://www.desertcart.dk/products/603226759-hilti-firestop-block-cfs-bl](https://www.desertcart.dk/products/603226759-hilti-firestop-block-cfs-bl)

---

*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-23*