--- product_id: 134985465 title: "205B Fast Hardener, 0.86 Quart" brand: "west system" price: "5721087₫" currency: VND in_stock: true reviews_count: 5 category: "West System" url: https://www.desertcart.vn/products/134985465-205b-fast-hardener-0-86-quart store_origin: VN region: Vietnam --- # High strength rigid cure 10-15 min pot life Moisture resistant 205B Fast Hardener, 0.86 Quart **Brand:** west system **Price:** 5721087₫ **Availability:** ✅ In Stock ## Summary > ⚡ Cure fast, build strong, stay ahead. ## Quick Answers - **What is this?** 205B Fast Hardener, 0.86 Quart by west system - **How much does it cost?** 5721087₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/134985465-205b-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 - • **Precision Dosing:** Compatible with #301 mini pumps for exact mixing and minimal waste—buy just what you need. - • **Rapid Cure Power:** Fast hardening formula cures in just 10-15 minutes at 70°F, perfect for urgent projects. - • **Cold Weather Champion:** Engineered to perform reliably even in lower temperatures, so your projects never stall. - • **Weather-Ready Durability:** Water-resistant finish ideal for moisture-exposed environments and powersports gear. - • **Unmatched Structural Strength:** Mixes with #105 resin to create a rigid, high-strength bond that stands the test of time. ## Overview WEST SYSTEM 205B Fast Hardener is a high-viscosity epoxy hardener designed for rapid curing when mixed 5:1 with #105 resin. It delivers a rigid, moisture-resistant bond with a pot life of 10-15 minutes at 70°F and full cure in 24 hours. Ideal for professionals and hobbyists needing quick turnaround, especially in cold or moisture-prone conditions. ## 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. Review: West System Products are wonderful for both hobbyists and professionals. Convent package sizes make it easy to buy the right amount without waste. 205-B is great for cold weather or fast cure needs. Review: Timely delivery of product is always desirable. West systems offers among the best performance for an adhesive and structural epoxy. Not to be confused with a slow cure or high depth of pour product. ## 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 | 686,042 in DIY & Tools ( See Top 100 in DIY & Tools ) 248 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 (214) | | 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 | | Material | Epoxy Resin | | Model Number | 205-B | | Other Special Features of the Product | Fast Drying | | Specific Uses For Product | Powersports Equipment, Moisture-Exposed Environments | | UPC | 811343010577 780333707172 799916783816 | | Viscosity | High Viscosity | | 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 ![205B Fast Hardener, 0.86 Quart - Image 1](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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by J***. on 24 November 2025* West System Products are wonderful for both hobbyists and professionals. Convent package sizes make it easy to buy the right amount without waste. 205-B is great for cold weather or fast cure needs. ### ⭐⭐⭐⭐⭐ Review *by J***. on 6 June 2024* Timely delivery of product is always desirable. West systems offers among the best performance for an adhesive and structural epoxy. Not to be confused with a slow cure or high depth of pour product. ### ⭐⭐⭐⭐⭐ Review *by D***T on 1 March 2025* Outstanding Application every time! ## Frequently Bought Together - West System 205-B Fast Hardener, Epoxy, Liquid, Epoxy Hardener, Clear - Polycell Multi-Purpose Polyfilla Ready Mixed, 1 Kg --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vn/products/134985465-205b-fast-hardener-0-86-quart](https://www.desertcart.vn/products/134985465-205b-fast-hardener-0-86-quart) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-04-23*