---
product_id: 49452056
title: "Hardener (PACK OF 2) 40g Tube Red for 2K Body fillers, Fibreglass repair fillers, Resins."
brand: "hardener"
price: "$14.66"
currency: USD
in_stock: true
reviews_count: 8
category: "Hardener"
url: https://www.desertcart.us/products/49452056-hardener-pack-of-2-40g-tube-red-for-2k-body
store_origin: US
region: United States of America
---

# Pack of 2 for value Fast curing power Fibreglass & resin compatible Hardener (PACK OF 2) 40g Tube Red for 2K Body fillers, Fibreglass repair fillers, Resins.

**Brand:** hardener
**Price:** $14.66
**Availability:** ✅ In Stock

## Summary

> 🛠️ Cure fast, fix smart — never miss a beat in your repair game!

## Quick Answers

- **What is this?** Hardener (PACK OF 2) 40g Tube Red for 2K Body fillers, Fibreglass repair fillers, Resins. by hardener
- **How much does it cost?** $14.66 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/49452056-hardener-pack-of-2-40g-tube-red-for-2k-body)

## Best For

- hardener enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Portable:** Lightweight 100g tubes with easy-to-handle dimensions, perfect for on-site repairs or workshop use.
- • **Dual-Pack Convenience:** Get twice the productivity with two 40g tubes, ensuring you never run out mid-job and save on bulk purchase.
- • **Rapid Hardening Action:** Accelerate your repair projects with a high-viscosity dibenzoyl peroxide formula that cures quickly and reliably.
- • **Fibreglass & Resin Ready:** Specifically engineered for polyester body fillers, fibreglass repairs, and resin applications—versatility that professionals trust.
- • **Trusted Quality & Safety:** Backed by a 4.6-star rating and manufactured by Tetrosyl, a leader in automotive repair solutions.

## Overview

This pack of two 40g red hardener tubes contains a high-viscosity dibenzoyl peroxide paste designed for rapid curing of 2K body fillers, fibreglass repair fillers, and resins. Ideal for polyester-based applications, it offers professional-grade performance trusted by automotive experts, combining efficiency, versatility, and value in one compact package.

## Description

Pack Of 2 40G Tube Red Hardener For 2K Body Fillers, Fibreglass Repair Fillers, Resins. Hardener Dibenzoyl Peroxide Paste. For Use With Polyester Body Fillers, Easy Sand, Fibreglass Repair Filler And Resins.

Review: Quality hardener - Cheapest way to buy with the small amount supplied in filler. Good product
Review: Does the job - Does the job, good price, fast delivery.

## Features

- Causes serious eye irritation.
- Heating may cause a fire.
- May cause an allergic skin reaction.
- Very toxic to aquatic life.
- Hardening paste with dibenzoyl peroxide.
- For use with polyester structure sealant, fiberglass repairs and resins.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01FZ4D6IS |
| Batteries | 2 C batteries required. |
| Best Sellers Rank | 5,000 in Automotive ( See Top 100 in Automotive ) 72 in Fillers, Adhesives & Sealants |
| Brand | Hardener |
| Customer Reviews | 4.6 4.6 out of 5 stars (622) |
| Date First Available | 21 May 2016 |
| Delivery information | We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. |
| Item Weight | 100 g |
| Item model number | 5010372702407 |
| Manufacturer | Tetrosyl |
| Manufacturer part number | EXH001 |
| Package Dimensions | 12 x 6.2 x 2.5 cm; 100 g |
| Special Features | Fibreglass Compatible |
| Viscosity | High Viscosity |

## Product Details

- **Brand:** Hardener
- **Item form:** Paste
- **Material:** Dibenzoyl Peroxide
- **Special feature:** Fibreglass Compatible
- **Specific uses for product:** Fibreglass

## Images

![Hardener (PACK OF 2) 40g Tube Red for 2K Body fillers, Fibreglass repair fillers, Resins. - Image 1](https://m.media-amazon.com/images/I/71upgFFAH6L.jpg)

## Questions & Answers

**Q: using it to fill hairline cracks in fibreglass shower tray - can it be sanded, overpainted, and is it waterproof?**
A: This is just a hardener. It is an additive for curing resin.  It is not a resin itself.  Thank you

**Q: does this work with big boy fibreglass**
A: Hi Colin
If you was originally supplied with red hardener with your product then this will do the job.
Red hardener is used for a majority of fillers and fibreglass fillers.
If need need any further information please do not hesitate to contact the Qpaints Team

**Q: Does this product garden resin jewellery and will it discolour the jewellery?**
A: don't think so but depends on the resin you are using too. Alsodo a test run first.

**Q: Is this harder red or white in colour?**
A: From memory its red but I used very little in the resin, so it did not really colour it. it did the job, but I did a test first to check that a small amount would harden the old resin I had.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quality hardener
*by J***S on 20 November 2025*

Cheapest way to buy with the small amount supplied in filler. Good product

### ⭐⭐⭐⭐⭐ Does the job
*by M***K on 27 July 2025*

Does the job, good price, fast delivery.

### ⭐⭐⭐⭐ Hardener for body-filler .
*by T***B on 25 October 2025*

All good . Quick delivery

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-17*