West System 105 Epoxy Resin is the base material on which all West System 105 System epoxy compounds are built.

Features:

• Clear, pale yellow, low-viscosity liquid epoxy resin
• Formulated for use with West System hardeners, it can be cured in a wide temperature range to form a high-strength solid with excellent moisture resistance
• Contains no volatile solvents and does not shrink after curing
• Has a relatively high flash point and no strong solvent odor, making it safer to work with than polyester or vinylester resins
• Designed specifically to wet out and bond with wood fiber, fiberglass, reinforcing fabrics and a variety of metals when mixed at the proper ratio with a West System hardener
• Excellent adhesive, will bridge gaps and fill voids when modified with West System fillers
• Can be sanded and shaped when cured
• With roller applications, has excellent thin-film characteristics to flow out and self-level without "fisheyeing"
• Resin viscosity approximately 1000 cps at 72°F (22°C)

* Dispensing and Mixing

• Dispense the proper proportions of resin and hardener into a clean plastic, metal or wax-free paper container
• Don't use glass or foam containers because of the potential danger from exothermic heat buildup
• DO NOT attempt to adjust the epoxy cure time by altering the mix ratio
  • An accurate ratio is essential for a proper cure and full development of physical properties
• Dispensing with Mini pumps
  • Most problems related to curing of the epoxy can be traced to the wrong ratio of resin and hardener
  • To simplify metering, we recommend using calibrated WEST SYSTEM Mini Pumps to dispense the resin and hardener
  • Mini Pumps are calibrated to deliver the proper working ratio of resin to hardener
  • Pump one full pump stroke of resin for each one full pump stroke of hardener
  • Depress each pump head fully and allow the head to come completely back to the top before beginning the next stroke
  • Partial strokes will give the wrong ratio
  • Read the pump instructions before using pumps
  • Before you use the first mixture on a project, verify the proper ratio according to the instructions that come with the pumps
  • Re-check the ratio anytime you experience problems with curing
• Dispensing without Mini Pumps (Weight/volume measure):
  • To measure 105 Resin and 205 or 206 Hardener by weight or volume, combine five parts resin with one part hardener
  • To measure 105 Resin and 207 or 209 Hardener by volume, combine three parts resin with one part hardener (by weight, 3.5 parts resin-1 part hardener)