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Product Details

WEST SYSTEM 105 Epoxy Resin cures to a high-strength plastic solid at room temperatures, by mixing specific proportions of liquid epoxy resin and hardener. Formulated to work with WEST SYSTEM 205 Fast, 206 Slow, 207 Special, and 209 Tropical Hardeners. You can use this clear, low-viscosity liquid epoxy in a wide temperature range, starting at 40 F. Cure time ranges from 60 minutes to 4 hours based on the hardener used. The curing process forms a high-strength solid bond with excellent moisture resistance. See 'Data Sheets' for more information on usage.

Designed specifically to wet out and bond with wood fiber, composite materials like fiberglass, and reinforcing fabrics, and a variety of metals. Ideal for marine and boat repair applications.

105 is an excellent adhesive that will bridge gaps and fill voids when modified with WEST SYSTEM fillers. When cured, you can sand and shape the resin as needed. In roller applications, it has excellent thin-film characteristics to flow out and self-level without fish-eyeing. 105 resin has a relatively high flash point and no strong solvent odor, making it safer to work with than polyesters.

Available for purchase in 1 quart, .98 gallon, and 4.35 gallon sizes.

Tech Specs
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
Info & Guides
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.

Reviews for WEST SYSTEM 105 Epoxy Resin

10 of 130 Reviews

June 13, 2024

yes
By sam from Michigan

Verified Purchase

yes

Bottom Line Yes, I would recommend to a friend

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May 15, 2024

Good stuff
By EllijayRay from Ellijay, GA

Verified Purchase

Worked as advertised

Bottom Line Yes, I would recommend to a friend

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May 12, 2024

Good Stuff
By Boat Restoring Fool from Omaha, NE

Verified Purchase

Lots of working time, maybe more than I wanted, but that's far better than not getting your piece where you wanted it before the epoxy kicked.

Bottom Line Yes, I would recommend to a friend

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May 12, 2024

Amazing
By Boat Restoring Fool from Omaha, NE

Verified Purchase

What is there to say about the time tested, industry standard West Systems resin that hasn't already been said. If you're new to using two part epoxy, every professional who uses epoxy goes back to West Systems after trying anything else. 101 works with a variety of different hardeners/catalysts. I keep several different hardeners around for different ambient temperatures from cold to hot. The hotter it is outside, the faster epoxy "kicks"—less working time. Use slower hardeners in these situations and vice versa for cold temps.

Bottom Line Yes, I would recommend to a friend

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August 8, 2023

Yes
By Lee from St paul

Verified Purchase

Very good. Easy to work with.

Bottom Line Yes, I would recommend to a friend

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March 22, 2023

Great Product
By Willy from St John VI

Verified Purchase

Tried and true product. For marine use as well as general wood working in a professional wood shop we dependened on West System.

Bottom Line Yes, I would recommend to a friend

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February 16, 2023

Best epoxy
By Larry from Grottoes,

Verified Purchase

I use this epoxy to do furniture repairs. It's the best I've used.

Bottom Line Yes, I would recommend to a friend

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February 9, 2023

have been using this for many years
By Kevin @ Munot Plastics from Erie, PA

Verified Purchase

We use this product (-w various additives) in the construction of prototype and low volume production Thermoform/vacuum form tooling. Happy with the ease of use, good pot life, good consistency, and non offensive odor. It has worked very well for us.

prototype tool
Bottom Line Yes, I would recommend to a friend

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February 1, 2023

Add is misleading
By Dc from Kansas

Verified Purchase

The add to me is misleading. It appears in add that if you purchase the gal of resin that the hardner comes with it. Since it didn't it caused over a weeks delay in my project. The product and service were great but from on I'll be watching for misleading adds.

Bottom Line Yes, I would recommend to a friend

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January 24, 2023

West System Epoxy
By Chuck from Missouri

Verified Purchase

This is the Cadillac. period

Bottom Line Yes, I would recommend to a friend

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