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West Systems 205C Fast Hardener 0.94 Gallon

Manufacturer

West Systems

<h3>About WEST SYSTEM Epoxy</h3><p>Since 1969, <strong>WEST SYSTEM</strong> has been the benchmark for marine-grade epoxy technology. Founded and headquartered in Bay City, Michigan, the brand built its reputation in the demanding world of boat building and boat repair — environments where structural integrity and long-term moisture resistance are non-negotiable. Decades later, WEST SYSTEM remains the go-to choice for professional boatbuilders, marine repair technicians, and dedicated DIYers around the world.</p><p>At the heart of the brand is the legendary <strong>105 System</strong> — a modular, field-proven approach to epoxy that gives users precise control over every aspect of a repair or build. The system centers on WEST SYSTEM Epoxy Products, which pair the 105 Epoxy Resin with a selection of hardeners, each engineered for different working conditions and cure speeds. Whether you need a fast-setting compound for a quick on-the-water fix or a slow-curing formulation for a complex laminating job in warm weather, there is a hardener designed for the task.</p><p><a href="/7644-west-systems-epoxy-adhesives-200378">WEST SYSTEM Epoxy Adhesives</a> take that same foundation and extend it into high-strength structural bonding. These formulations are compatible with wood, fiberglass, Kevlar, carbon fiber, metals, and ceramics — making them equally at home in a marine boatyard, a woodworking shop, or a composite fabrication facility. WEST SYSTEM epoxy forms strong, load-bearing bonds that often exceed the strength of the surrounding material , which is why builders trust it for everything from hull construction to bulkhead installation.</p><p>Rounding out the system, <a href="/200404-fillers-west-systems-7644">WEST SYSTEM Fillers</a> allow users to fine-tune the physical characteristics of a mixed epoxy batch. Users can adjust the epoxy with one of six WEST SYSTEM fillers, or add one of several additives to create specific coating properties. Options range from low-density fairing compounds ideal for creating smooth, sandable surfaces, to high-density microfiber blends engineered for structural glue joints and filleting work.</p><h3>Why WEST SYSTEM Stands Apart</h3><ul style="list-style:disc"><li><strong>Modular versatility:</strong> WEST SYSTEM Epoxy products make up a versatile epoxy system that can be used for everything from basic, long-lasting, marine epoxy repairs to the construction of high-performance composites. </li><li><strong>Moisture resistance:</strong> Designed to create a protective barrier, WEST SYSTEM epoxy prevents water infiltration, ensuring long-term durability in marine environments. </li><li><strong>Broad material compatibility:</strong> WEST SYSTEM marine epoxy is compatible with various materials, including fiberglass, Kevlar, and carbon fiber, for superior structural integrity. </li><li><strong>User-focused design:</strong> WEST SYSTEM 105 Epoxy Resin, Hardeners, Fillers, Additives, and Materials are designed and developed with the end-user in mind. </li></ul><p>Whether you are restoring a classic wooden sailboat, cold-molding a new hull, patching a delaminating deck, or fabricating a custom composite component, WEST SYSTEM provides the engineered materials and the technical guidance to get the job done right the first time.</p>

Part Number

205C
09/19/2036 2:33 PM
Sale Price

$231.22

In Stock (10+)

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Usually delivered within 2 days

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Live-in-stock inventory

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Product Details

The West System 205C Fast Hardener is a rapid-cure epoxy hardener designed for use with West System 105 Resin in a 5:1 mixing ratio. This formulation produces a rigid, high-strength, moisture-resistant epoxy system ideal for boat building, repairs, and composite fabrication where faster cure times are needed.

Key Features:

  • Fast cure time with 9-12 minute pot life at 72°F
  • Creates high-strength, moisture-resistant bonds when mixed with 105 Resin
  • 5:1 mixing ratio (5 parts resin to 1 part hardener)
  • Compatible with West System 300 Mini Pumps for accurate dispensing
  • 0.94 gallon (.66 gallon net weight) container size
  • Ideal for warmer temperatures or when faster production is required

This fast hardener is particularly useful in warm weather conditions or when working on projects requiring quick turnaround. The shorter pot life allows for faster cure and return to service, making it excellent for repair work and production environments. For best results, use the West System 300 Mini Pump Set to ensure proper 5:1 ratio mixing.

Products specifications

Capacity

0.94 Gallons

Type

Hardener

Best Use

Fast Hardener for 105 Epoxy Resin

Cure Time

6 to 8 Hours (Working Time 60-70 Minutes) at 72 F

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