---
product_id: 5003941
title: "3M Bondo Liquid Hardener 1 Tube 0.37 fl oz., Use with Fiberglass Resin for Auto and Home Repairs Including Tubs, Showers, Sinks, Pools, Hot Tubs, and Boats, Waterproof Repair (00912)"
brand: "bondo"
price: "1336 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "3 M"
url: https://www.desertcart.is/products/5003941-3m-bondo-liquid-hardener-1-tube-0-37-fl-oz
store_origin: IS
region: Iceland
---

# 100% waterproof repair Fast 20-min cure Seamless resin hardening 3M Bondo Liquid Hardener 1 Tube 0.37 fl oz., Use with Fiberglass Resin for Auto and Home Repairs Including Tubs, Showers, Sinks, Pools, Hot Tubs, and Boats, Waterproof Repair (00912)

**Brand:** bondo
**Price:** 1336 kr
**Availability:** ✅ In Stock

## Summary

> 🛠️ Fix it fast, fix it right—waterproof your world with 3M Bondo!

## Quick Answers

- **What is this?** 3M Bondo Liquid Hardener 1 Tube 0.37 fl oz., Use with Fiberglass Resin for Auto and Home Repairs Including Tubs, Showers, Sinks, Pools, Hot Tubs, and Boats, Waterproof Repair (00912) by bondo
- **How much does it cost?** 1336 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/5003941-3m-bondo-liquid-hardener-1-tube-0-37-fl-oz)

## Best For

- bondo enthusiasts

## Why This Product

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

## Key Features

- • **Rapid Cure Power:** Achieve full strength in just 20 minutes—no downtime, just results.
- • **Effortless Mixing:** Low viscosity formula blends smoothly for a flawless finish every time.
- • **Versatile Application:** Perfect for auto bodies, fiberglass, metal fillers, and home repairs.
- • **Waterproof Confidence:** Guaranteed 100% waterproof repairs for boats, tubs, and vehicles alike.
- • **Professional Grade Reliability:** Trusted by pros with a 4.7-star rating and industrial-grade performance.

## Overview

3M Bondo Liquid Hardener is a professional-grade catalyst designed to chemically react with Bondo polyester fiberglass resin and metal reinforced fillers, delivering fast-curing, durable, and 100% waterproof repairs. Ideal for automotive, marine, and home applications, this easy-to-mix hardener ensures a seamless, long-lasting finish trusted by professionals worldwide.

## Description

Liquid Hardener mixes with Fiberglass Resin and Bondo Metal Reinforced Filler to create high-quality, long-lasting repairs. When hardener is mixed with product, a chemical reaction occurs to create a mixture that will deliver a strong, lasting repair. Our hardener is also easy to mix.

Review: 3M Bondo Hardener Review - I needed this to fix a fiberglass project on a vehicle I was restoring. The product works perfectly as expected from 3M products and I recommend using this for fiberglass or filler applications as it works very well. Easy to use and mix. Definitely the best value for the money!
Review: Works great - Works great

## Features

- Liquid hardener designed for Bondo polyester fiberglass resin and Bondo Metal Reinforced Filler requiring liquid hardener
- Creates chemical reaction with resin for fast curing
- Results in a 100% waterproof repair
- Great for repairing auto bodies and boats
- Easy mixing produces a better hardener and filler blend
- Use during the Fill stage of the 3M Body Repair System
- Flash point: 93.3 degrees_celsius
- For industrial/occupational use only. Not for consumer sale or use.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BO6RUC |
| Best Sellers Rank | #16,376 in Automotive ( See Top 100 in Automotive ) #29 in Body Repair Putty |
| Brand | Bondo |
| Color | Transparent |
| Customer Reviews | 4.7 4.7 out of 5 stars (588) |
| Date First Available | July 7, 2004 |
| Full Cure Time | 2E+1 Minutes |
| Global Trade Identification Number | 00076308009120 |
| Is Discontinued By Manufacturer | No |
| Item Form | Not Aplicable |
| Item Package Quantity | 1 |
| Item Volume | 11 Milliliters |
| Item Weight | 0.64 ounces |
| Item model number | 912 |
| Manufacturer | 3M |
| Manufacturer Part Number | 912 |
| Material | Plastic |
| Model | Bondo Liquid Hardener, Use with Fiberglass Resin, 0.37 Fl oz, 1 bottle |
| Number of Pieces | 1 |
| Package Information | Tube |
| Product Dimensions | 8 x 5 x 1 inches |
| Special Feature | Fast Curing, Waterproof, Durable, Efficient |
| Special Features | Fast Curing, Waterproof, Durable, Efficient |
| Specific Uses For Product | Masonry, Wall Repair |
| UPC | 076308009120 |
| Viscosity | Low Viscosity |
| Viscosity Level | Low |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Bondo
- **Item Form:** Not Aplicable
- **Material:** Plastic
- **Special Feature:** Fast Curing, Waterproof, Durable, Efficient
- **Specific Uses For Product:** Masonry, Wall Repair

## Images

![3M Bondo Liquid Hardener 1 Tube 0.37 fl oz., Use with Fiberglass Resin for Auto and Home Repairs Including Tubs, Showers, Sinks, Pools, Hot Tubs, and Boats, Waterproof Repair (00912) - Image 1](https://m.media-amazon.com/images/I/510z9MxUE5L.jpg)
![3M Bondo Liquid Hardener 1 Tube 0.37 fl oz., Use with Fiberglass Resin for Auto and Home Repairs Including Tubs, Showers, Sinks, Pools, Hot Tubs, and Boats, Waterproof Repair (00912) - Image 2](https://m.media-amazon.com/images/I/51kmAo6uF7L.jpg)
![3M Bondo Liquid Hardener 1 Tube 0.37 fl oz., Use with Fiberglass Resin for Auto and Home Repairs Including Tubs, Showers, Sinks, Pools, Hot Tubs, and Boats, Waterproof Repair (00912) - Image 3](https://m.media-amazon.com/images/I/61K1WWuhmIL.jpg)
![3M Bondo Liquid Hardener 1 Tube 0.37 fl oz., Use with Fiberglass Resin for Auto and Home Repairs Including Tubs, Showers, Sinks, Pools, Hot Tubs, and Boats, Waterproof Repair (00912) - Image 4](https://m.media-amazon.com/images/I/61PGNsToieL.jpg)
![3M Bondo Liquid Hardener 1 Tube 0.37 fl oz., Use with Fiberglass Resin for Auto and Home Repairs Including Tubs, Showers, Sinks, Pools, Hot Tubs, and Boats, Waterproof Repair (00912) - Image 5](https://m.media-amazon.com/images/I/61Y7ICNdFqL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 3M Bondo Hardener Review
*by N***A on December 14, 2025*

I needed this to fix a fiberglass project on a vehicle I was restoring. The product works perfectly as expected from 3M products and I recommend using this for fiberglass or filler applications as it works very well. Easy to use and mix. Definitely the best value for the money!

### ⭐⭐⭐⭐⭐ Works great
*by B***O on October 9, 2025*

Works great

### ⭐⭐⭐⭐⭐ Hardens
*by C***D on August 22, 2025*

Its a tube of hardener. And it hardens resin like is intended 👌😁

## Frequently Bought Together

- 3M Bondo Liquid Hardener 1 Tube 0.37 fl oz., Use with Fiberglass Resin for Auto and Home Repairs Including Tubs, Showers, Sinks, Pools, Hot Tubs, and Boats, Waterproof Repair (00912)
- 3M Bondo Fiberglass Resin 0.9 Pint, Stage 2, Waterproof Formula for Repairing, Resurfacing, or Rebuilding Metal, Wood, Fiberglass or Masonry Surfaces (401)
- Bondo Fiberglass Cloth, 20128, 8 Sq Ft

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-07*