---
product_id: 134985465
title: "WEST SYSTEM 205B Fast Hardener, 0.86 Quart"
brand: "west system"
price: "$295.17"
currency: USD
in_stock: true
category: "West System"
url: https://www.desertcart.ec/products/134985465-west-system-205b-fast-hardener-0-86-quart
store_origin: EC
region: Ecuador
---

# Moisture resistant High strength cure 10-15 min pot life WEST SYSTEM 205B Fast Hardener, 0.86 Quart

**Brand:** west system
**Price:** $295.17
**Availability:** ✅ In Stock

## Summary

> ⚡ Cure fast, bond strong, stay ahead of the pack!

## Quick Answers

- **What is this?** WEST SYSTEM 205B Fast Hardener, 0.86 Quart by west system
- **How much does it cost?** $295.17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/134985465-west-system-205b-fast-hardener-0-86-quart)

## Best For

- west system enthusiasts

## Why This Product

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

## Key Features

- • **Trusted by Pros:** Highly rated (4.8/5) and a top choice in metal-filled epoxies.
- • **Rapid Cure Power:** Get projects done faster with a 10-15 minute pot life at 70°F.
- • **Unmatched Strength:** Creates a rigid, high-strength bond when mixed 5:1 with #105 resin.
- • **Versatile Compatibility:** Bonds seamlessly with glass, metal, plastic, resin, and wood.
- • **Moisture-Resistant Formula:** Perfect for moisture-exposed environments and powersports gear.

## Overview

WEST SYSTEM 205B Fast Hardener is a premium epoxy hardener designed for rapid curing and high-strength bonding. When mixed with #105 resin at a 5:1 ratio, it delivers a rigid, moisture-resistant solid with a pot life of just 10-15 minutes at 70°F. Ideal for demanding applications involving glass, metal, plastic, resin, and wood, this 0.86-quart fast-drying formula is trusted by professionals and DIY enthusiasts alike for durable, water-resistant results.

## Description

FAST HARDENER produces rapid cure. Mix with #105 resin 5:1 for rigid, high strength, rigid moisture resistant solid. Pot life of 10 to 15 minutes at 70°F. Use #301 mini pumps. Size: 0.86 Quart.

## Features

- Causes severe skin burns and eye damage.
- Harmful if swallowed.
- Harmful in contact with skin.
- May cause an allergic skin reaction.
- May cause damage to organs through prolonged or repeated exposure.
- Suspected of causing genetic defects.
- Toxic to aquatic life with long lasting effects.
- WEST SYSTEM 205B, WSY205B

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002NY6SW |
| Best Sellers Rank | 215,865 in DIY & Tools ( See Top 100 in DIY & Tools ) 113 in Metal Filled Epoxies |
| Brand | West System |
| Colour | clear |
| Compatible Material | Glass, Metal, Plastic, Resin, Wood |
| Container Type | Bottle |
| Customer Reviews | 4.8 4.8 out of 5 stars (218) |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00811343010577 |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Volume | 0.86 Quarts |
| Item Weight | 2.2 Pounds |
| Manufacturer | WEST SYSTEM |
| Manufacturer Part Number | 205B |
| Material | Epoxy Resin |
| Model Number | 205-B |
| Number of Pieces | 1 |
| Other Special Features of the Product | Fast Drying |
| Specific Uses For Product | Powersports Equipment, Moisture-Exposed Environments |
| UPC | 811343010577 780333707172 799916783816 |
| Unit Count | 813.8635 millilitre |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** West System
- **Item form:** Liquid
- **Material:** Epoxy Resin
- **Special feature:** Fast Drying
- **Specific uses for product:** Powersports Equipment, Moisture-Exposed Environments

## Images

![WEST SYSTEM 205B Fast Hardener, 0.86 Quart - Image 1](https://m.media-amazon.com/images/I/41Ls73hwKlL.jpg)
![WEST SYSTEM 205B Fast Hardener, 0.86 Quart - Image 2](https://m.media-amazon.com/images/I/5106EITkz4L.jpg)
![WEST SYSTEM 205B Fast Hardener, 0.86 Quart - Image 3](https://m.media-amazon.com/images/I/81Cx3Y5mmYL.jpg)

## Questions & Answers

**Q: how much hardner do i need for 4.35 gallons?**
A: The resin and hardener come as a 5 to 1 ratio. The resisnt exactly a gallon, the hardener in I think a 25 oz can goes with a “gallon” of resin so you would need to get five of these 25 oz cans of hardener and you’ll have 2/3 of a can of hardener left when you’ve used up your 4.35 gallons of resin.

**Q: I have used Envirotex Lite to coat tiles and it is crystal clear but SO long to cure. Question is if this is crystal clear? And how long to cure?**
A: You have to use 207 hardner and 207 resin. Go to West system site and read about clear finish.

**Q: Do these containers come full ? appeared to have channellock marks on lid channel and there was hardener on inner lid. Missing 2 inches of product.**
A: It doesn't matter. It was obviously opened by someone. Just return it and get another one or a refund.

**Q: My set of resin and hardener came today, but the hardener is brownish/redish in color when I pump it out.  Is that correct or should I return it?**
A: My hardener was slightly brownish when mixing with the resin, but after mixing it would clear up, and it would harden clear as well.  If it is very pronounced, you may have a problem, but if it is just a tint that goes away when you mix, that seems to be normal.  You may want to do a test on some scrap material to confirm.

## Frequently Bought Together

- West System 205-B Fast Hardener, Epoxy, Liquid, Epoxy Hardener, Clear
- Polycell Multi-Purpose Polyfilla Ready Mixed, 1 Kg

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-09-22*