When West System's 105 and 205 are used in the supplied ratio (5:1), the cured resin/hardener mixture will yield a high-strength, rigid solid which has excellent cohesive properties and provides an outstanding moisture vapour barrier, with superb bonding & coating properties.

West System 105:

West System Epoxy 105 Resin is the base material on which all West System family compounds are built. 105 is a clear, pale yellow, low-viscosity liquid epoxy resin that, when combined with any of the West System Hardeners, will cure to a hard, solid plastic that is functionally waterproof and highly resistant to moisture vapour. Based on which hardener you choose, 105 will cure at a wide range of temperatures.

The epoxy resin will wet out and bond with wood fibre and fibreglass. It will also bond well with a variety of metals. Unlike polyester or vinylester resins, West System epoxy does not shrink after curing. It's also much safer to use than styrenated resins as it has a relatively high flash point and no solvent odour.

West System 205:

Often used in lower temperatures, West System's 205 Fast Hardener a medium-viscosity epoxy curing agent that is often used to produce a rapid cure that develops its physical properties quickly at room temperature.