105 Epoxy Resin: At the heart of the West System product line, 105 Resin is a clear, light amber, low-viscosity epoxy designed for strength, durability and adaptability. It can be modified with West System fillers or additives, making it suitable for laminating, bonding, coating, filleting and fairing applications.

205 Fast Hardener:​ The 205 Fast Hardener is a versatile curing agent formulated for rapid cure and reliability across most conditions. When mixed with 105 Resin at the recommended 5:1 ratio, it produces a rigid, high-strength, moisture-resistant solid with excellent bonding, cohesive and barrier-coating properties. This ensures dependable results in both structural and protective marine applications.

Together, the 105 Resin and 205 Fast Hardener form a high-performance, marine-grade epoxy system trusted by boat builders and repair professionals worldwide.

For accurate mixing, the West System B Pack Pump Set (sold separately) ensures consistent resin-to-hardener ratios.

• 2-part marine epoxy kit: Includes 5kg 105 Resin & 1kg of 205 Hardener
• 205 hardener provides a faster cure to set & develop strength more quickly
• Designed for boat building, repair & medium-scale marine projects
• Suitable for bonding, laminating, coating, filleting & fairing
• Produces a rigid, high-strength, moisture-resistant solid
• Can be tailored with West System fillers & additives
• Compatible with the B Pack Pump Set (sold separately) for precise mixing
• Both hardeners are not recommended for clear coating