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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.

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Overall Rating

4.7

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101 to 126 of 149 Reviews
101 – 126 of 149 Reviews
Mattapoisett, MA
5 out of 5 stars.

Easy to Use- Hard as a Rock!

15 years ago
Epoxy with slow hardener can be used alone to protect plywood (wheelhouse etc.), but can also be mixed with thickeners from West System to make fillets and bonding. I used 17 oz. biaxial with mat on my lobster boat rebuild and it worked well to wet out the fiberglass, and create super strong bonds and fiberglass.
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Asheville, NC
5 out of 5 stars.

West System for custom woodwork

15 years ago
West Systems is great for all custom woodworking applications. I use it primarily on mortise & tenon jointery and filling/enhancing defects in ""character wood"". It has been a staple in my shop for about 30 years.
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Skaneateles, NY
5 out of 5 stars.

core replacemnt

15 years ago
We used the West system and Balsa core to replace the deck of a Marine Trader 34. The core was soaked and VERY soft. Now we can jump up and down on them. They are strong and dry.
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Jackson, TN
5 out of 5 stars.

the Swiss Knife of adhesives

15 years ago
I bought this to repair some delaminated areas on my RV. I wound up using it for wet layup and to adhere in a lot of other places. The how videos here are great. With the different additives you can create a range of different properties for the epoxy. Wonderful stuff.
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Superior, WI.
4 out of 5 stars.

I wish I had ordered more of this.

15 years ago
When using other products I had to clean a lot of the amine blush off but with this product I didnt even notice any blush at all. For this reason I was able to get my project done much faster.
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Altadena, CA
5 out of 5 stars.

Great Product

15 years ago
Very easy to use. Looks great on texalium and Carbon Fiber or simply fiberglass. The metered pumps work great. This is a very easy to use resin with vacuum bagging. Highly recommended.
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South Bend,IN
5 out of 5 stars.

Nice Product

15 years ago
This was the first time I had ever used an epoxy. Thought it was amazing. Used it with 6oz. fiber glass cloth to glass the hull of 18ft. cedar strip boat. Levels out great. If your a rookie like me get the slow hardener, this was the only down fall I got the 205 hardener which was way to fast for me.
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Marathon, Florida Keys
5 out of 5 stars.

Great for fiberglass or wood boat repair

15 years ago
I built a hard enclosure for the aft deck of my 41' motor yacht complete with sides, door frames, doors and aft wall. Completely glued and sealed all wood with two coats of West System epoxy and painted it with Awlgrip. Everyone thinks it was built that way at the factory.
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Asheville,NC
5 out of 5 stars.

West System is not just for boatbuilders

16 years ago
I've been using the West Epoxy System for over 30 years and it has been a most versatile and excellent product. I started using this epoxy when I was doing boatbuilding and repair in the New England area. I later changed over to the historic preservation arena and have specialized in window and door restoration.The West system with it's different hardeners and fillers has given me the tools to make many various fixes that otherwise would not have been able to be done and has contributed to many historic windows and doors being saved. The West Epoxy System is a very flexable system that allows me to accomplish my work.
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Lakewood, WA
5 out of 5 stars.

west is the best!

16 years ago
i soak it into paracord to make it hard and durable and use it to bond various materials to metal
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Salem Oregon
5 out of 5 stars.

West System Epoxy

16 years ago
This stuff is magic. A must for restoring old wood canoes
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Eugene, Or
5 out of 5 stars.

I always come back.

16 years ago
I'm a professional woodworker and have continuously used epoxy for a wide variety of projects. Once in awhile I try other products, but invariably come running back to West System.
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colorado
5 out of 5 stars.

HOCKEY STICKS

16 years ago
I have been looking for exceptional strong bond of composite carbons, to repair youth floor hockey sticks.I have found many ways of stable repair and perminent repairs.105 epoxy is great !
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Chattanooga, TN
5 out of 5 stars.

Unbelievable

16 years ago
This is an amazing product which worked wonders when I was mounting the trolling motor on my boat. I had to attach a large metal lever to the back of the boat to hold the motor. This epoxy was used to seal and secure the screws that hold the lever in place. I thickened the epoxy to provide adhesion and had a great result. The trolling motor has been used a lot and the epoxy has secured the lever as well as sustained through water and weather. I was initially worried that the adhesive I would use would not be strong enough to support the weight of the trolling motor but am extremely impressed by its resilience. Fabulous product with many uses!
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Shalimar, FL
5 out of 5 stars.

Consistent Results

16 years ago
Very versatile, high strength, gap filling. Acts as a lubricant for close fitting joints. Is my primary glue, I have been using it for over 10 years.
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Cape Cod, Mass.
5 out of 5 stars.

MJKennedy fine woodworking

16 years ago
Ipe's oily nature is not conducive to strong glue joints, especially when movement stress occurs. We found its lapachol residue sent us searching for a quality adhesive. 20 years of bending wood and a weeks worth of testing every glue we could find online. The combination of the 207 hardner and 105 resin, made the inpossible possible. Laminating this wood called for a business bankruptcy. The deck is a 11'2"" radius, with hundreds of glue joints. This deck is on the ocean, holding up to elements. West System once again proved this is a quality product. P.S.- we use this product through out our freestanding spiral staircases. This is the strongest adhesive we can find
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Warwick,R.I.
4 out of 5 stars.

stringer replacement hull and deck

16 years ago
Used west system epoxy on a complete stringer and transom replacement,my first,with some guidance from experienced users we were laminating,filleting and glassing without too much trouble.I really like the way 105 is used for everythings base.The only drawback I can think of would be the sticky clean up.
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Media, PA
5 out of 5 stars.

Very good, versatile product

16 years ago
I am currently using West Systems epoxy building a skiff, but I always keep some around because it is so versatile as an adhesive, sealant, gap filler, etc. etc. It has a long shelf-life. With 105 resin, fast and slow hardeners, and a couple of fillers (e.g. coloidal silica and Microlight), it can be used across a wide range of temperatures and for many, many applications. Tech support from West has been personal and very helpful. Epoxyworks publication has many tips and applications you may not have thought about. For example, per Epoxyworks, I used some to reattach sagging plaster in my house. One drawback: West is somewhat pricey. I've also used System 3, with which I have also been very pleased. System 3 is very slightly cheaper. West is more readily available, e.g. at local marine supppliers. I am very careful about mix ratios and completely mixing, so I've never had any problems with incomplete cures.
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Boston, MA
5 out of 5 stars.

Excellent product

16 years ago
I've used West System epoxy for repairing cracked teak toe rails, for re-glassing bulkheads, and other general repairs. The DVD that explains its use is very helpful, with good visual and verbal explanations for various uses. Proper mixture of resin and hardener are critical. The optional pumps make measuring exact, and IMHO are essential. Mixing as instructed will ensure a solid, nearly bulletproof repair. Clean up is best done before the spilled mixture has time to kick/set up. Acetone usually cleans up the mess. I found that using the 205 fast hardener permits proper curing down to 40 degrees F. A little extra heat from a heat gun or light bulb helps. An excellent product!
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South Carolina
5 out of 5 stars.

fix boat wood rot

16 years ago
I have used West System for years on dryrot on my boat. Dig out the rot. I use a spoon to messure 5 to one and add filler. It drys in an hour and I only need one coat of paint over it. Sometime if not completely dry I paint anyway and the paint and resin dry together. If a large hole I use water base wood filler and when it drys I sand it and then put a coat of West over the filler.
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Bozeman, MT
3 out of 5 stars.

Good, but has its quirks

16 years ago
I have to agree with radiodude's review. West Sys appears to be very sensitive to getting the proper mix ratio (5:1). The pumps help, but if you don't get it just right, or if some epoxy does not get mixed in well with the hardener, you will get partial cures. Also, the amine blush can be pretty bad compared to other epoxy I've used. Finally, I had some incompatibility with Interlux Schooner varnish (this has been loosely documented as an occasional issue in the past) over the West epoxy. I still keep it around for laminating and small jobs that will not be overcoated directly, but personally will not use it for glassing, or flow coats.-[@]
Helpful?
Winthrop, MA
3 out of 5 stars.

Good, but not for all applications

16 years ago
The packaging system and pumps make it easy to use in the correct proportions, and it needs to be in the correct proportions, it is not forgiving of mistaken mixes. It is possible to get bad results if the ambient temp drops during cure, or humidity gets very high during cure. In the humidity case, the result was a milky appearance and partial cure. In these cases, you need to remove it and start over. I have also had some instances of partial cure, where the ""final"" result is rubbery. I have found that this epoxy is good for general repairs, especially with coarse cloths and mat, it laminates well to polyester and vinylester when making hull repairs. The powder fillers are dusty and messy but work well for 'fill' repairs and make it easy to sand smooth and flush. This epoxy does not seem to work at all on Teak or Oak wood. It is too viscous and does not penetrate the grain. This results in just a skin coat of epoxy on the wood's surface, which later peels off the oak or teak, like old, blistered latex paint. It worked ok on mahogany and pine/fir. Do not use it in thick coats or try to 'pot' anything, even something tiny, the exotherm will make it smoking hot and you will have a rubbery mess that is hard to clean up. It seems to accept mix-in color pigments fairly well.
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Erie, Pa
5 out of 5 stars.

Have used WSystem for a long time

16 years ago
There is not anything one can say against WSystem; saves lots of maintenance used properly.
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VA
5 out of 5 stars.

Great Product

17 years ago
Great product. Buy the pumps, it makes life that much easier.
Helpful?
Addison, VT
5 out of 5 stars.

Does all that I ask, and probably more!

17 years ago
I use West 105 Epoxy with the clear 207 hardener for coating cedar strip canoes with fiberglass. The glass wets out easily, adhesion to wood is great, and the clarity with slight amber color enhances the wood's beauty. Sanding irregularities is hard work, like any resin, so it's worth taking the time to get a good finish to minimise this. The epoxy also makes a wonderfully strong glue if thickened a little to prevent running out of joints.
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Boothbay Harbor, ME
5 out of 5 stars.

WEST System works well

17 years ago
What can i say, i love this stuff. As easy to use as any two part glue. The pumps make everything one to one. Here in NE, the 205 cures quicker in the lower temps so my parts are sandable the next day.
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23 Ratings-Only Reviews

101 – 126 of 149 Reviews

Questions

1 - 10 of 158 Questions

Q: I live in Northern Minnesota and it gets pretty cold here. UPS, as usual, just sets packages on our deck. If I order West Systems Epoxy in the winter time and it sits outside for a while and freezes, will it be ruined? Thanks

5 months ago
2 Answers

A: Epoxy is not shipped in temperature controlled containers. Short term exposure to cold temperature will not damage it. As long as you bring it up to room temperature before you mix it you should be good to go. For long term storage, you should keep it in moderate temperatures.

5 months ago
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Q: What is the best epoxy resin for laminating the side wall of an RV? I will be injecting through tubing downward on a vertical wall through a 1/4 inch tube. I have used the Total Boat High Performance Epoxy on boat work but the 105 looks like it could work also and it seem to be less expensive. Which would you recommend? Thanks Jim Lambert Jim@ithelp.tv

9 months ago
1 Answer

A: You can use either epoxy. However, the high performance is a bit more flexible, and less likely to overheat when injected.

9 months ago
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Q: I am putting white oak on a porch. Can i use this epoxy as a weatherproofer and as the final finish?

10 months ago
1 Answer

A: You can use it to seal the wood but it will have to be overcoated to protect from UV damage.

10 months ago
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Q: I have an antique wooden dough bowl that I'm turning into a sink. I need a clear coat finish that will make it waterproof. What would you recommend?

10 months ago
1 Answer

A: You can use the West 105 Resin with 207 hardener for a clear finish. Even though it's a 5:1 resin, it is mixed with 207 hardener at a 3:1 ratio.

10 months ago
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Q: What is the cure time I'm wanting to use it to fix some Delamination on my RV

a year ago
1 Answer

A: There are a lot of variables that affect cure time. Please refer to the info provided under the tab labeled ""Data Sheets"".

a year ago
Helpful?

Q: Making a wooden boat and need fiber

a year ago
1 Answer

A: Hey there. Thanks for reaching out. You can view our fiberglass cloth selection here: https://www.jamestowndistributors.com/product/fiberglass-and-building-materials/fiberglass-cloth or give us a call at 800-497-0010 and we can help you select the right glass for your project.

a year ago
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Q: Given a wood substrate with a base coat of oil base polyurethane coating, I'd like to apply an epoxy top coat to this surface. Have you heard of any problems due to the oil base coating. For instance, problems such as extreme beading of the epoxy or the epoxy surface ""breaking up "" into isolated puddles. How do you advise? Kent Moon

a year ago
1 Answer

A: I'm not sure why you used an oil-based paint. I see a picture of West System epoxy. Wear epoxy is excellent but, I'm not sure what the effect will be using it over the oil base paint.

a year ago
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Q: how much hardener 205 hardener to a gallon of to 105 slow hardener

2 years ago
2 Answers

A: The ratio is 5 to 1, 5 parts resin and 1 part hardener. Purchase the West System 300 mini pump system. When installed properly the pump measure the two parts perfectly.

2 years ago
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Q: Will this bond to paint or take paint? I was thinking about painting a board I am making and then putting the gloss coat over the top of the paint. If so is there a type of paint I should use?

2 years ago
2 Answers

A: Here's the painting guidance from West System: https://www.westsystem.com/instruction-2/epoxy-basics/finish-coatings/ I hope that this helps! - Eric

2 years ago
Helpful?

Q: I've seen videos of using this to repair RV sandwich flooring. How much would be required to inject approx 60 sq. Ft in a 6""grid pattern?

2 years ago
1 Answer

A: That will depend on how deep the fill will be. If you are drilling a 1/4"" diameter hole 1"" deep and that uses 1/10th of an ounce a gallon of resin would fill about 1280 holes. A quart would fill about 320 holes. A sq ft with holes every 6"" would be 9 holes x 60 = 540 holes you would need 2 quarts of resin. This math may not be correct because after the 1st sq ft of holes you will only be filling 6 holes on the next sq ft so this would me more than enough resin.

2 years ago
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1 - 10 of 158 Questions
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