WEST System Epoxy Resin, 105 fiberglass resin
WEST System west system epoxy
  • WEST System Epoxy Resin, 105 fiberglass resin
  • west system epoxy
  • west system epoxy

WEST System 105 Epoxy Resin

WEST System Epoxy cures to a high-strength plastic solid at room temperatures, by mixing specific proportions of liquid epoxy resin and hardener.

This clear, pale yellow, low-viscosity liquid epoxy resin is 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.

Designed specifically to wet out and bond with wood fiber, fiberglass, reinforcing fabrics and a variety of metals, 105 is an excellent adhesive that will bridge gaps and fill voids when modified with WEST SYSTEM fillers. It can be sanded and shaped when cured. In roller applications, it has excellent thin-film characteristics to flow out and self-level without fisheyeing. 105 resin has a relatively high flash point and no strong solvent odor, making it safer to work with than polyesters.

1 qt and more
IN STOCK - Available for pickup
$35.78 / qt
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Tech Spec Product Info User Generated Content
By using a simple "cookbook" approach you can tailor the handling characteristics and the physical properties of the cured epoxy to suit your working conditions and specific coating or bonding application.

1. Start with 105 Resin, the basic ingredient of all WEST SYSTEM epoxy compounds.

2. Mix with one of four WEST SYSTEM Hardeners. Select a hardener for its intended use and for the cure speed best suited for your job in the temperature range in which you are working.

3. Add one of six WEST SYSTEM fillers to thicken the mixture as needed. Select a filler for its handling characteristics or cured physical properties. Or, add one of six WEST SYSTEM additives to provide specific coating properties.

Group Size  Resin Quantity  Hardener Quantity  Mixed Quantity  Saturation Coat - Porous Surfaces  Build-Up Coats Non-porous Surfaces  Tensile Strength (PSI) 
A  WSY 105A - 1 Qt. (.94 L)  205A or 206A - .43 Pt. (.20 L)  1.2 Qt. (1.15 L)  90- 105 sq. ft. (8.5-10 sq. m)  120-135 sq. ft. (11-12.5 sq. m)  105/205 - 7,846, 105/206 - 7,320 
A  WSY 105A - 1 Qt. (.94 L)  207A or 209A - .66 Pt. (.31 L)  1.3 Qt. (1.26 L)  90-105 sq. ft. (9-10 sq. m)  120-135 sq. ft. (11-13 sq. m)  105/207 - 7,509, 105/209 - 7,338 
B  WSY 105B - .98 Gal. (3.74 L)  205B or 206B - .86 Qt. (.81 L)  1.2 Gal. (4.55 L)  350-405 sq. ft. (32-37 sq. m)  462-520 sq. ft. (43-48 sq. m)  105/205 - 7,846, 105/206 - 7,320 
B  WSY 105B - .98 Gal. (3.74 L)  207B or 209B - 1.32 Qt. (1.24 L)  1.3 Gal. (4.98 L)  370-430 sq. ft. (35-40 sq. m)  490-550 sq. ft. (45-50 sq. m)  105/207 - 7,509, 105/209 - 7,338 
C  WSY 105C - 4.35 Gal. (16.47 L)  205C or 206C - .94 Gal. (3.58 L)  5.29 Gal. (20 L)  1530-1785 sq. ft. (142-165 sq. m)  2040-2300 sq. ft. (190-213 sq. m)  105/205 - 7,846, 105/206 - 7,320 
C  WSY 105C - 4.35 Gal. (16.47 L)  207C or 209C - 1.45 Gal. (5.49 L)  5.8 Gal. (21.9 L)  1675-1955 sq. ft. (155- 180 sq. m)  2235-2520 sq. ft. (207-233 sq. m)  105/207 - 7,509, 105/209 - 7,338 
Material: Epoxy
Type: Resin
Usage: Laminating
4.8 87

I've been using this product for 20 years !


So many projects over the past 20 years and never a disapointment.


San Pedro , CA.

I use West System epoxies very frequently


I use West System epoxies very frequently With great results. If you get the thickness correctly, smooth sailing from there.


Greensburg, PA




West Epoxy is awesome, as is Jamestown Disr.


Philadelphia, Pa


Timely delivery


The products I ordered were West System 105 resin and 206 hardener, filler, and pumps. Everything arrived in a timely manner. The instructions on the West web site were very informative for a novice user. the only reason I did not rate it a 5 as the gallon size resin can was dented pretty good on the bottom corner. It did not leak and or create any other usability issues so I did not complain about it.




Great product for building thermoform prototype tooling


We use West Systems in combination with other materials to build prototype thermoforming tools. Works great, have not had a bad experience in at least 10 years.


Erie, PA


Easy to use epoxy


I've used West System Epoxy for several lap strake boats I've built. With the associated pumps it's easy to mix up small batches and easy to apply. My shop is cool in Northern, Vermont, but I always got a good cure by leaving heat on for a few hours. I simply let the wood fire go out and come back a few hours later to the shop and turn off a couple Mr. Heater tank top heaters.


Fletcher, Vermont


West system is a great epoxy


After trying a few of the other brands, I decided to try west systems. This product has a much lower viscosity rating, making it easier to penetrate those small cracks. The epoxy is easy to thicken with a variety of fillers and takes dye well. I would also recommend using the metered pumps as they make mixing this epoxy a dream.


Novi, MI


Good product


I commented on the hardener and the comments apply to the resin as well. Buying it from Jamestown is considerably cheaper than getting it from the local marinas. I have mixed feelings about taking business away from the local store that I often depend on for items or advice, but price is certainly a consideration.


Plainfield, Vt


superb quality epoxy when it really matters


My go to product when glue failure is not an option




I love this stuff


I build a wide variety of things and I am very happy with the WEST system. There are few surfaces that epoxy will not bond well to.


New Jersey


WEST System 105 Epoxy Resin



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