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.

$36.07 / 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
4.8 103

As always , West is the best


Used West 105 to seal the mahogany seats on my 41 yr old Boston Whaler.


Lake Champlain, Vt


Just what the doctor ordered.


Have used West System epoxy before & the product works. Had to recore a section of my deck & my deck hatches.




105 best around


I use west system epoxy to seal the seams on the roof of the Vardo's i build


South Thomaston Me


I would buy this product again.


Excellent epoxy and got great price with a free shipping coupon.

Swamp man

Mandeville, LA


Product as advertised


Works according to West System product information.


Richmond VA


This is the only epoxy I use


Little to no odor, no allergic reaction on my skin and high performance versatile bonding and filling


Syracuse NY


Just what I needed.


Local hobby shop was out of the item and unknown as to when they would get it in. Needed product to continue building my radio control B-17 bomber. Use it with the 207 hardener to apply thin fiber glass to the balsa covering to seal and strengthen the covering in preparation for painting.


Albuquerque, New Mexico


I will buy this product again


Have always used this product and don't like to take chances . . . I know how to use it and it always works but must to care re. ambient temps. That said, have had a some Totalboat epoxy and hardeners that will likely try them out on a few smaller projects over in the next few months.




Performance deserves 5 stars. Storage can be a problem.


For a occassional user who tries to store resin for say 12 months .. it gets cloudy, makes you wonder.


northern michigan


This Product Is Exactly What I Wanted


Thank you for the prompt delivery. The product specifications are exactly as mentioned in the description. Thanks!!!


San Jose, CA


WEST System 105 Epoxy Resin



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