WEST SYSTEM INFORMATION PAGE

Filler Application

Laminating

Hardware Bonding

WEST SYSTEM INFORMATION PAGE

RETURN TO LAST PAGE

Epoxy Shelf Life
If the containers are kept sealed when not in use, West System resin and hardeners are usable for many years. 105 Resin will exhibit a slight increase in viscosity over time, and will therefore require extra care when mixing with hardener.

Estimating Coating Coverage*
Quantity of Saturation Coat Buildup Coats
Mixed epoxy Porous Surfaces Nonporous Surfaces

With 105 Resin and 205 or 206 Hardeners
Group Size A 90-105 sq.ft. 120-135 sq.ft.
Group Size B 350-405 sq.ft. 462-520 sq.ft.
Group Size C 1530-1785 sq.ft. 2040-2300 sq.ft.
With 105 Resin and 207 or 209 Hardeners
Group Size A 90-105 sq.ft. 120-135 sq.ft.
Group Size B 370-430 sq.ft. 490-550 sq.ft.
Group Size C 1675-1955 sq.ft. 2235-2520 sq.ft.
*Adding fillers or wetting out fabrics will decrease coverage.

Choosing a Hardener
Select a hardener based on pot life or working time, overall cure time, ambient temperature and whether a clear coating is desired. Each resin/hardener combination will go through the same cure phases, but at different rates. Choose the hardener that gives you adequate working time for the job you’re doing at the temperature and conditions you are working under. 205 Fast and 206 Slow Hardener can be mixed to vary the cure times. It is critical, however, to maintain the proper 5 part resin to 1 part hardener ratio. Do not mix 205 or 206 (5:1) Hardeners with 207 or 209 (3:1) Hardeners.

Pot Life Cure to Min. Characteristics
Hardener @ 72F Solid Temp. and Use

#205 9-12 min. 6-8 hr. 40F Fast cure, low temperature

general bonding and coating.

#206 20-25 min. 9-12 hr. 60F Slow cure, warm temperature

general bonding and coating.

#207 20-25 min. 9-12 hr. 60F Slow cure, warm temperature

clear coating

#209 40-50 min. 20-24 hr. 65F Very slow cure, high temp.

general bonding and coating.

RETURN TO LAST PAGE

Filler Selection Guide

Suitability of fillers for specific applications.

Key: Most suitable = 5, Least suitable = 0.

System Overview

1. 105 Epoxy Resin is the basic ingredient.
2. Control the cure time or adjust to the working temperature or working time required with one of four hardeners.
3. Adjust the strength, weight, texture, sandability and color of the cured epoxy with one of six West System Fillers. Adjust the viscosity of the resin/hardener mixture by the amount of filler added. Or provide specific coating properties with West System Additives.

Hardeners	Uses	Fillers	Uses	Additives	Uses
205 Fast	Wet Out – Coat porous surfaces before bonding with thickened epoxy. Laminating – Bond sheets or layers of materials with tight fitting joints. Fabric Application – Apply fabrics to surfaces or laminate in molds. Barrier Coating – Apply multiple coats of epoxy for moisture protection.	403 Microfibers	Bonding – Thicken resin/hardener mixtures for structural gap filling. Bonding with Fillets – Increase joint bonding area and create a structural brace. Bonding Hardware – Use epoxy to distribute hardware fastener loads over larger areas and increase fastener load capability. Laminating – Bond layers of wood strips, veneers, planks, sheets and cores.	420 Aluminum Powder 422 Barrier Coat Additive 423 Graphite Powder 425 Copper Compound 501 White Pigment 503 Gray Pigment	Coat for Abrasion Resistance – Apply epoxy modified to provide tough, abrasion and moisture resistant protection. Coat for Moisture Resistance – Apply coats of epoxy modified for maximum moisture protection. Coat for Low Friction – Apply a touch, low-friction coating or bearing surface. Coat for Painting Base – Apply an opaque, colored epoxy base for painting.
206 Slow		404 High-Density
		405 Filleting Blend

209 Topical
		406 Colloidal Silica
207 Special Coating	Clear Fabric Application – Apply fabrics to wooden surfaces to provide a clear, natural finish. Clear Coating – Coat wooden surfaces with a clear moisture barrier.
		407 Low-density	Fairing – Fill low areas and built up surfaces with an easily shaped and sanded surfacing/fairing compound.
		410 Microlight