West System 105 Epoxy Resin (Part A)

Marine Grade Epoxy Resin Base for Structural Bonding & Laminating

West System 105 Epoxy Resin Part A (21204861) is a premium marine-grade epoxy resin base formulated for high-strength bonding, coating and composite laminating applications.
Designed to be mixed with compatible West System hardeners, 105 Resin provides outstanding adhesion, moisture resistance and mechanical performance across timber, fibreglass, composites and selected metals. Its low-viscosity formulation ensures excellent wet-out of reinforcement fabrics and strong penetration into porous substrates, making it ideal for marine construction and structural repairs. When combined with the appropriate hardener, it cures to a tough, durable solid with superior resistance to water and environmental exposure. Widely trusted in Australian boat building, woodworking and composite fabrication industries, West System 105 delivers reliable performance where structural integrity and long-term durability are critical.

Features & Benefits

Key Features

• Marine-grade epoxy resin – Part A
• Low viscosity for excellent wet-out
• Compatible with West System hardeners
• Superior moisture resistance
• Suitable for bonding, coating and laminating

Key Benefits

• Provides high-strength structural bonding
• Enhances penetration into timber and composites
• Delivers durable, water-resistant performance
• Supports professional marine repairs
• Versatile across multiple fabrication applications
  
  

Technical Specs

• Product Type: Epoxy resin – Part A
• System: West System 105
• Mixing Requirement: Must be combined with compatible West System hardener
• Application: Bonding, laminating, coating
• Product Code: 21204861

Key Applications

• Marine boat building and hull repairs
• Timber bonding and structural joinery
• Composite and fibreglass laminating
• Sealing and coating timber surfaces
• Industrial maintenance and fabrication
  
  

West System 105 Epoxy Resin Part A (21204861) FAQs

Q1: What is West System 105 Epoxy Resin Part A (21204861) used for?
A: It is the resin base used with a compatible hardener for structural bonding, coating and laminating applications.

Q2: Can this resin be used on its own?
A: No, it must be mixed with a West System hardener to cure properly.

Q3: Is this suitable for marine environments?
A: Yes, it is widely used in boat building and marine repair due to its moisture resistance.

Q4: What materials does it bond to?
A: It bonds to timber, fibreglass, composites and selected metals when properly prepared.

Q5: Can it be used for fibreglass laminating?
A: Yes, it provides excellent wet-out and strength for composite reinforcement.

Downloads

• Safety Data Sheet (SDS)