WEST SYSTEM 105A Epoxy Resin Bundle with 205A Fast Hardener - Accurate

In this review the WEST SYSTEM 105A Epoxy Resin Bundle is evaluated for woodworkers, boat repairers, and hobby builders who need a reliable, easy-to-measure epoxy system. The bundle pairs a 32 fl oz can of 105-A resin with a 7 fl oz 205-A fast hardener and a calibrated 300 Mini Pumps set, and the single biggest reason to buy is the accurate 5:1 metering that removes guesswork during mixing while delivering a fast, dependable cure for bonding and coating tasks.

Key Features

• Complete bundle: Contains 105-A resin, 205-A fast hardener and calibrated pumps for a ready-to-use kit without sourcing parts separately.
• Accurate 5:1 mixing: Calibrated 300 Mini Pumps dispense the correct resin to hardener ratio so users get consistent mixes and predictable cures.
• Fast curing: 205 Fast Hardener develops physical properties quickly at room temperature, useful when faster turnaround is needed.
• Low-viscosity resin: 105 Resin wets out wood fibers, fiberglass and metals well, making it suitable for bonding and laminating tasks.
• Work and cure times: Pot life at 72F (22C) is about 9 to 12 minutes and it cures to a solid state in 6 to 8 hours, giving a reasonable working window and quick handling strength.
• Friendly to use: The formulation has no solvent odor and relatively high flash point, so it is more pleasant than styrenated resins for bench or shop use.

Who It's For

The bundle is ideal for woodworkers building strip kayaks and canoes, small boat repairers doing fiberglass and core work, and hobbyists who need a reliable quick-curing epoxy that bonds well to wood, fiberglass and metal. The calibrated pumps make it especially useful where accurate mix ratios matter and where repeated small batches are common.

Those who need clear, high-gloss coating for a finish may want a different hardener, since 205 Fast Hardener is not intended for clear coating. Also, projects requiring very long pot life or industrial-scale volumes could be better served by other hardener choices or larger sizes.

Pros & Cons

Pros

• Accurate pump metering ensures consistent 5:1 mixes and reduces waste.
• Fast development of strength at room temperature lets repairs be handled the same day.
• Low-viscosity resin wets out fabrics and wood fibers for strong bonds and laminates.
• Pumps and containers are durable and built for repeated use in shop environments.

Cons

• 205 Fast Hardener is not intended for clear topcoats, limiting its use for final glossy finishes.
• Short pot life at moderate temperatures may require speedy work or small batch mixing for larger projects.

Specifications

Our Verdict

The WEST SYSTEM 105A bundle is a practical, value-minded kit for craftsmen who need a dependable, fast-curing epoxy with precise metering. It is especially good for woodworking, boat repair and small laminations where accurate 5:1 mixes and quick development of strength matter. Buyers seeking a clear coating hardener or long pot life for large pours should consider alternate hardeners, but for routine bonding and repairs this bundle is hard to beat for convenience and control.

Frequently Asked Questions

Can the pumps be used long term?
The polypropylene calibrated pumps are durable and intended to provide years of dependable metering when cleaned and stored properly.

Is 205 Fast Hardener suitable for clear topcoats?
No, 205 Fast Hardener is not intended for clear coating; choose a different hardener if you need a glossy, clear finish.

How precise is the mix ratio with the pumps?
One pump stroke of resin for each pump stroke of hardener yields approximately 0.8 fl oz of the exact 5:1 mix ratio for consistent results.