--- product_id: 292311881 title: "West System 205 Fast Hardener.43 Pt .47 Lb" brand: "west system" price: "FREE" currency: JPY in_stock: false reviews_count: 5 category: "West System" url: https://www.desertcart.jp/products/292311881-west-system-205-fast-hardener-43-pt-47-lb store_origin: JP region: Japan --- # Strong bonding with 5:1 resin ratio Fast 3-day full cure Works down to 40°F (4°C) West System 205 Fast Hardener.43 Pt .47 Lb **Brand:** west system **Price:** FREE **Availability:** ❌ Out of Stock ## Summary > 🔗 Fast, tough, and ready when you are—bond like a pro with West System 205! ## Quick Answers - **What is this?** West System 205 Fast Hardener.43 Pt .47 Lb by west system - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/292311881-west-system-205-fast-hardener-43-pt-47-lb) ## 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 Mix Master:** Optimized 5:1 resin-to-hardener ratio ensures flawless bonding every time. - • **Waterproof & Durable:** Built to withstand moisture, keeping your bonds strong and lasting. - • **Cold-Weather Champion:** Reliable epoxy performance even at chilly 40°F, perfect for year-round use. - • **Versatile Bonding Power:** Ideal for fiberglass and multiple materials—your go-to adhesive for tough jobs. - • **Rapid Strength, Zero Wait:** Achieve full cure in just 3 days—no downtime for your projects. ## Overview West System 205 Fast Hardener is a medium-viscosity epoxy curing agent designed for strong, waterproof bonds and coatings. It cures fully in 3 days, performs reliably at temperatures as low as 40°F, and mixes with 105 Resin at a precise 5:1 ratio for optimal strength. Ideal for fiberglass and versatile bonding needs, it’s the trusted choice for professionals seeking fast, durable results. ## Description 205 Fast Hardener is a medium-viscosity epoxy curing agent. It is useful in a majority of bonding situations, and at lower temperatures. Mix it with WEST SYSTEM 105-C Resin in a five-part resin to one-part hardener ratio. Review: Fast and convenient - This was my first time using West System epoxy. I bought this along with the kit with the 204A hardener. The 205 hardener worked great with plenty of working time for some butcher block waterfall counter tops I was assembling. Thick enough to address some minor gaping issues yet thin enough to squeeze out properly for a great wood joint. I've use the hardware store epoxies or small bottle epoxies for many years and finally bit the bullet for West System. More expensive upfront but much cheaper overall. It is so much more convenient. The pumps are quick and so much more accurate for ensuring a proper cure. I highly recommend this product. Review: Excellent product - Excellent product! Shipped very fast. ## Features - 205 Fast Hardener is a medium-viscosity epoxy curing agent. It is useful in a majority of bonding situations, and at lower temperatures. - Mix it with WEST SYSTEM 105-C Resin in a five-part resin to one-part hardener ratio. - The combination of 105 Resin/205 Fast Hardener has excellent bonding and coating properties. - Minimum recommended temperature: 40°F (4°C) - 205 Fast Hardener is not intended for clear coating. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002NY6T6 | | Best Sellers Rank | #201,428 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #8 in Fume & Smoke Extractor Filters | | Brand | West System | | Brand Name | West System | | Color | Clear | | Colour | Clear | | Compatible Material | Fiberglass | | Container Type | Can | | Customer Reviews | 4.7 out of 5 stars 224 Reviews | | Full Cure Time | 3 Days | | Global Trade Identification Number | 00678358932108, 00811343010027 | | Item Form | Liquid | | Item Package Quantity | 1 | | Item Weight | 9.6 Ounces | | Item form | Liquid | | Manufacturer | WEST SYSTEM | | Material | Epoxy Resin | | Material Type | Epoxy Resin | | Model | 205 | | Number of Pieces | 1 | | Other Special Features of the Product | Fast cure time, adaptability with various modifications | | Part Number | 205-A | | Special features | Fast cure time, adaptability with various modifications | | Specific Uses For Product | Bonding, Coating | | Specific uses for product | Bonding, Coating | | UPC | 678358932108 811343010027 | | Unit Count | 222.39 Milliliters | | Viscosity Level | Medium | | Volume | 206 Milliliters | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** West System - **Specific uses for product:** Bonding, Coating - **Material:** Epoxy Resin - **Compatible material:** Fiberglass - **Item form:** Liquid ## Images ![West System 205 Fast Hardener.43 Pt .47 Lb - Image 1](https://m.media-amazon.com/images/I/71QqBGsNhQL.jpg) ![West System 205 Fast Hardener.43 Pt .47 Lb - Image 2](https://m.media-amazon.com/images/I/81ZnL4CXwaL.jpg) ## Questions & Answers **Q: The description of this item says .43 Pints which is 7 ounces. However, the picture of the container says 27.5 ounces. Which is it?** A: The WEST Systems products are sold in several sizes. 7 oz round cans, 32 oz rectangular cans as shown here, and large rectangular cans of 126 oz. Try to confirm the size you are buying. **Q: Shelf life of 205 hardener? My cured epoxy (105+205) is soft, gooey, even when measured exactly with a syringe.** A: I believe 105 resin takes a higher proportion of hardener than 205 resin. Check the directions. **Q: How much faster than the "slow" hardener does the "fast" one cure?** A: On the manufacturer's website states cure time is 6 to 8 hours. The pot life at 72 degrees Celsius has 6 to 12 minutes to work with. **Q: Will the pumps work on the smaller 7 fl oz cans ?** A: I believe that if you purchase the set of 3 pumps, the smallest will fit the smallest container which is, I think, a pint. If you don't routinely use something like an eighth cup or more, you might want to consider buying some syringes from a farm supply store (a 60ml syringe for the resin and a 12 ml for the hardener). I recommend these sixes because the epoxy is mixed at a 5:1 ratio of resin to hardener and syringes of these sizes mix one major increment of one to one major increment of the other. Contact me again if this isn't clear. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fast and convenient *by S***. on 28 April 2021* This was my first time using West System epoxy. I bought this along with the kit with the 204A hardener. The 205 hardener worked great with plenty of working time for some butcher block waterfall counter tops I was assembling. Thick enough to address some minor gaping issues yet thin enough to squeeze out properly for a great wood joint. I've use the hardware store epoxies or small bottle epoxies for many years and finally bit the bullet for West System. More expensive upfront but much cheaper overall. It is so much more convenient. The pumps are quick and so much more accurate for ensuring a proper cure. I highly recommend this product. ### ⭐⭐⭐⭐⭐ Excellent product *by A***R on 22 April 2019* Excellent product! Shipped very fast. ### ⭐⭐⭐⭐⭐ Harbner *by C***R on 13 May 2019* Great product ## Frequently Bought Together - West System 205-A Fast Hardener - West System 105-A Epoxy Resin,Clear Pale Yellow - WEST SYSTEM 300 Mini Pump Set --- ## 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.jp/products/292311881-west-system-205-fast-hardener-43-pt-47-lb](https://www.desertcart.jp/products/292311881-west-system-205-fast-hardener-43-pt-47-lb) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-02*