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.
Thickening:
When used with West System fillers, the resin creates an excellent structural adhesive or fairing compound. Epoxy thickened with adhesive (high-density) fillers makes structural bonds, bridges gaps and also fills voids. When thickened with fairing (low-density fillers), the epoxy is easily sanded and shaped after it cures.
Coating:
105 is also a superb coating material. When applied with a roller, the resin offers excellent thin-film characteristics and will flow out and self-level without fisheying. When combined with West System's 207 Special Clear Hardener, you can create a natural finish.
Project Uses:
Adhesion.
Boat repair.
Casting.
Fabrication.
Furniture.
Marine.
Moulding.
Specifications:
Pot Life (100g cupful) at 25C: 9-12 minutes.
Working Time (thin film) at 25C: 60-70 minutes.
Cure to a solid, thin film: 6-8 hours.
Cure to working strength: 1-4 days.
Minimum recommended temperature: 4C.
Epoxy cures faster at higher temperatures and in thicker applications.
