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105A Epoxy Resin, Quart
105A Epoxy Resin, Quart Item #37095
In stock
$54.99 Each
105B Epoxy Resin, 0.98 Gallon
105B Epoxy Resin, 0.98 Gallon Item #37102
In stock
$114.99 Each

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WEST SYSTEM® Epoxy Resin

WEST SYSTEM Epoxy 105 Resin when mixed with a WEST SYSTEM Epoxy Hardener is an ultra-tough waterproof coating, a high-strength, gap filling adhesive or an easily sanded surface filler for wood, fiberglass, reinforcing fabrics and a variety of metals.
Item #
98% of 100
The 105 Epoxy Resin is the base material of the WEST SYSTEM family. A clear, pale yellow, low-viscosity resin, 105 forms a high-strength solid with excellent moisture resistance, and is designed specifically for wood fiber, fiberglass, reinforcing fabrics and a variety of metals. The Resin works in conjunction with a variety of WEST SYSTEM Hardeners, Fillers and Pumps for a wide range of applications.

Combined with 205 Fast, 206 Slow and 209 Extra-Slow Hardeners (sold separately), the cure time of 105 can be fine-tuned and adjusted for a wide range of temperatures. For coating and roller applications, it can be combined with 207 Coating Hardener, which provides excellent thin-film characteristics to flow out and self-level without "fisheyeing." Cures clear to light amber, so you can achieve a natural wood finish when coating with varnish.

(1) WEST SYSTEM® Epoxy Resin
More Information
Brand West System
Weight 10.3400
Tech Spec
  • 105 Resin viscosity is approximately 1000 cP (centipoise) at 72°F (22°C).
  • Coverage for "A" resin containers: Porous surfaces: 90-105 sq. ft. (8.5-10m2)Non-porous surfaces: 120-135 sq. ft. (11-12.5 m2)
  • Coverage for "B" resin containers: Porous surfaces: 350-430 sq. ft. (32-40 m2)Non-porous surfaces: 462-550 sq. ft. (43-50 m2)
  • Sizes: .98 gallon or 1 Quart
4.9 / 5.0
40 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Epoxy Resign
Works great. Use in well vented area.

Use the pumps as they measure the resign for proper mixing.
April 28, 2020
1 month ago
Woodworking Experience:
Worked great for filling voids on a live edge table I made
April 22, 2020
1 year ago
Woodworking Experience:
Excellent Epoxy 5:1
Those who don't read have little advantage over those who don't read... I asked and was told it was 1:1. Ended up with a gooey mess cleaned up with acetone. Read the instructions 5:1 worked great!
July 20, 2019
11 months ago
Woodworking Experience:
Works great. Never been disappointed with the results.
July 12, 2019
over 2 years ago
Woodworking Experience:
Worked better than anticipated.
Highly recommended
May 26, 2019
1 year ago
Woodworking Experience:
I have used this epoxy on furniture that has been out in the elements for over 17 years and si still holding up well. my katest project is filling cracks and voids with a epoxy colored with stain it will look amazing. i love this product..
Filling Voids with West System Epoxy
Filling Voids with West System Epoxy
July 23, 2018
1 year ago
Woodworking Experience:
worked like a charm
Product was easy to use. Slow drying is slow and that does give you a chance to work with it. Will take a couple of applications because it shrinks as it dries. Sands easily. Very nice product.
May 28, 2018
over 2 years ago
Wood Filler
Did a great job filling insect and rot damage on tne walnut slab wood. Mixed and cured consistently using the West pumps.
May 24, 2018
over 2 years ago
Woodworking Experience:
This Epoxy gives you control
I have used epoxy for over 25 years casting table finish, cutting boards, Statue repair and product castings. This stuff gives you total control [ working time] to do what you want.
January 13, 2018
over 3 years ago
Woodworking Experience:
Great Product
Very Satisfactory Transaction
January 5, 2018
over 2 years ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 24 questions Browse 24 questions and 42 answers
Why did you choose this?
Rockler Store
Have used before.
William F on Jul 29, 2018
For specific application.
Donald R. B on Apr 30, 2018
Have used before.
William F on Jul 29, 2018
Art l on May 8, 2018
For specific application.
Donald R. B on Apr 30, 2018
Wood Whisperer Mark Spagnola recommended on his youtube channel.
Nicholas K on Apr 11, 2018
recommended by professional woodworker friends of my son
Ronald K on Sep 12, 2017
I wanted to try a new product and West systems has really good reviews.
Luis T on Sep 7, 2017
Cost and in the container size
Gary H on Jul 3, 2017
Saw it on You Tube demonstration by woodworker
Ronda S B on Jan 2, 2017
Great product.
Justin on Sep 15, 2016
Past favorable experience
Arnie B on Jun 3, 2016
Used to fill large nail holes in 100yr old reclaimed lumber. Harder than the wood itself and plugged the holes perfectly. Mixed sanded dust with clear liquid to match color of wood...sort of.
Eric E on Mar 25, 2016
recommendations on line and low centipoise (will flow into knots and gaps easier.
Joseph J on Aug 5, 2015
wood whisperer recommended
Joseph L on Jul 24, 2015
needed some epoxy and thought i would give West brand a try
Scotlee on Jun 25, 2015
Blaine L on Jun 4, 2015
Good Stuff
Jerry G on Apr 18, 2015
Art l on May 8, 2018
Wood Whisperer Mark Spagnola recommended on his youtube channel.
Nicholas K on Apr 11, 2018
What is the best food and dishwasher safe epoxy?
John E on Dec 12, 2016
WEST SYSTEM® Epoxy Resin
WEST SYSTEM® Epoxy Resin
T-88 Structural Epoxy
T-88 Structural Epoxy
Quick Cure 5-Minute Epoxy
Quick Cure 5-Minute Epoxy
BarrelBond 5-Minute Epoxy Gel Glue
BarrelBond 5-Minute Epoxy Gel Glue
Sculpwood Moldable Epoxy Putty
Sculpwood Moldable Epoxy Putty
Behlen 5-Minute Epoxy
Behlen 5-Minute Epoxy
WEST SYSTEM Epoxy-Hardener
WEST SYSTEM Epoxy-Hardener
Is this food safe?
A shopper on Jun 13, 2015
BEST ANSWER: Depends. If you are planning on using this on something that is going to have direct contact with food, I would not suggest it. Especially if being used to repair a cutting board or any other food serving item that will be subjected to high heat. If you are planning on using this to finish of repair a table top, chair, bench, mante,l bed frame or any other decorative piece then you should be good. I personely have had great results using this product to repair reclaimed wood for stair treads. Hope this helps.
I just finished my second coat of epoxy on my old sailboats sole --( marine grade plywood). It's really beautiful just like it is but there are a few small bubbles in it and I need to know how to get decent UV protection although this piece is inside the boats cabin sole?
Ron H on Jul 10, 2017
BEST ANSWER: not sure about the UV part of your question but when applying the epoxy you can take a torch and sweep the flame above where the bubbles are (constantly moving the flame and not too close) and this will draw any bubbles to the surface effectively removing them for a smooth finish.
mix ratio of the west system resin + hardener ?
A shopper on May 16, 2015
BEST ANSWER: Enter Dispensing without Mini Pumps (Weight/volume measure) - To measure 105 Resin and 205 or 206 Hardener by weight or volume, combine five parts resin with one part hardener. To measure 105 Resin and 207 or 209 Hardener by volume, combine three parts resin with one part hardener (by weight, 3.5 parts resin-1 part hardener)an answer to this question.
would I be able to adhere brass to wood? it's an outdoor wood door frame
Robert s on Jun 5, 2018
BEST ANSWER: The short answer is probably. Adhesion always depends on weight, surface condition, adhesive surface area. But if you want to attach a light brass object like a name plate to bare wood, and the brass is clean of oils, etc. then yes, it should work very well. If the brass object is very heavy then you should ask the manufacturer. Make sure that the mating surfaces are clean and flat (i.e., fit well). It would not hurt to rough them up a bit with sandpaper. The epoxy seems viscous when it is fresh but it does have a tendency to run. Mask the area around the job to protect the surface from runs.
Will this product glue PTFE to plywood?
Dik H on Feb 23, 2017
BEST ANSWER: Only if you prepare the surface so the epoxy can bond to it.

It is generally necessary to undertake some form of surface preparation prior to bonding, such as a flame, corona discharge or plasma treatment or an etch with a solution of sodium and naphthalene in tetrahydrofuran. There are proprietary primers available also. Once the surface is prepared, a range of adhesives can be used including, epoxies, polyurethanes, acrylics and rubber based systems but practical trials are recommended for each application to identify the most suitable adhesive(s).

Companies including Loctite, and 3M have developed specialist acrylic based adhesives that bond directly to PTFE (DP8005 and 3030 respectively) with no need for pre-treatment other than solvent wipe. Additionally, double-sided tape may also offer a solution.
Can i fill in all of the cracks in my old hardwood with this. We have sanded, stained and used a minwax sealer. The minwax sealer was supposed to fill in the cracks but hasnt. We have done 4 coats already. Can we use this on top to get a smooth finish that is easy to clean?
Victoria L on Aug 2, 2016
BEST ANSWER: Do not know how big your cracks are or what you are fixing if they are 1/16" or smaller and flat not vertical. West is some what thick in viscosity and will fill small cracks. Be prepared to follow directions of 4 parts resin and 1 part hardener and keep level for 6 t0 12 hrs and it will set not dry. it is fiberglass. It may take sanding after first coat then the second coat. If it is a big crack put heavy tape on the back side to keep the resin from dripping through and several applications to fill the crack then coat the final product when crack is full of hardened resin. Patience and thought is the key. I use throw away brushes. The resin is pretty self leveling but different than paint or varnish. it is a build up finish not a penetrating finish. Best wishes.
I have a long split in my table from the wood pulling apart. Will this work to fill that gap and should I fill it from the bottom to the top (flip the table over in other words)?
Adam C on May 17, 2018
BEST ANSWER: I can only answer Whts in front of me. So with that in mind, the epoxy will not hold the split from future splitting. U would need to look at other options (bow tie). If you have a complete though space to fill, the best way is to fill from where the largest opening is (top or bottom) taping parchment paper to cover the bottom side. Fill until u have an 1/16th or so of epoxy bowing over the top side. Then sand off the excess. Hope that helps. U would need to us the West hardener for that epoxy.
I have deteriorated wood rake trim at the gable end of a south facing building, painter says it won't hold paint, will West System work on this application?
Bill B on May 23, 2017
BEST ANSWER: With out seeing or bing there the best answer that i can give is: Maybe. Epoxy is rather pricey. It will coat the wood and seal it. I am to assume that there is Paint on the rake trim now and you are going to paint over it. I would suggestion would be to remove and strip and repair, Primer and paint. If not that maybe consider Oil based paint. Has a tuffness to it. The epoxy may do it. but you are sill going to have to paint over the is and it bing on the south part of the building will still were faster than the other sides. The folks at West Systems would or may have a better answer for you. Good luck with you project.
How big of a hole can be filled with this product?
Kathy P on Jan 15, 2016
BEST ANSWER: It can fill however big a hole you are willing to wait for. You should only do a portion of a large hole at a time to ensure that it cures thoroughly between lifts. I typically only fill about an inch (25mm) at a time.

Of course, with a larger hole you have to take greater care to ensure that you don't get a blow-out while the first lift is curing and having all your epoxy spilling out on the floor.
Is this machinable on a lathe?
Herbert L on Sep 13, 2019
BEST ANSWER: Yes.. correct length of time to cure.. and correct ratio applied.. it is machinable ..
does it work on aluminum ?
mark d on May 24, 2019
BEST ANSWER: West Systems epoxy is a great product. I've had success on many materials, but I haven't done any structural bonding on aluminum. The problem with aluminum is its oxide layer. For best results the surface should be cleaned before bonding. Industry uses non-etching alkaline chemical cleaners. At home, abrading the surface just prior to bonding should work well. The company has a tech support group that is very helpful. This site won't let me post their phone number but you can find it on the web.
I’m doing a desktop with big cracks that will be filled first with light blue glass rocks/pebbles then encased in epoxy. West Systems 105/206 is not clear enough, it is curing Amber to brown in this Monkey Pod slab. What alternative do you recommend?
Jon T on May 14, 2018
BEST ANSWER: My experience with West Systems epoxy is that they all cure to an amber color. You might want to look on West Systems's website to see if they have any "clear" or "water white" epoxy. There are many sellers of resins used for the type of filling that you're doing, and many of these resins are, indeed, water white.
Can this product be used for a solid wood countertop?
Matte on Nov 28, 2017
BEST ANSWER: yes, can cover it and fill in giant or small voids also. Super runny so make sure you block any holes. it's a two part product and sets fairly quickly.
once opened, what is the shelf life of the 105 resin and the 106 slow hardener?
Israel C on Aug 6, 2017
BEST ANSWER: myself only by enough to use as I need to ovoid storage and so I don't have to worry about it getting wasted.but I think if you don't mix it with the hardener. You should have a reasonable shelf life.
Hi I create orgonite devices and have been using a very toxic resin so must only pour my devices outdoors....but someone suggested i switch to this as it is non toxic and can be safely poured this accurate info? I made myself very sick pouring my other resin indoors and after a near death experience learned my I need a non toxic resin for indoor pouring...can you suggest something?
Cathy D on Jun 14, 2017
BEST ANSWER: Cathy - I have used the West System epoxy on several project, always indoors. It has very little odor and can be handled safely. Just follow the direction on the can to mix and apply. I give it overnight to cure and it works fine. My latest project is to coat a turned wood bowl both inside and outside for a final finish. I would highly recommend this product, Dave Duca
I have a wooden box that I am going to have filled with water all the time (its part of a fountain). Can I use this to seal the wooden box (26 x 8 x 4 inches) so that it won't leak or deteriorate over time?
markus on Aug 28, 2016
BEST ANSWER: Any finish that is made is only water resistant NOT water proof. Certain finishes will be water resistant longer than others. To meet your goal of using a wooden box to hold water you will need to line the box in a sealed cornered plastic. Good luck!
after I sand my wood table top, do I need to apply another product before I use the West system epoxy?
frank on Mar 14, 2020
BEST ANSWER: I did not apply another product before applying and the adhesion is very solid. It does saturate (I.e. wet) the wood so it will darken similar to an oil-type finish.
PLEASE make sure you thoroughly mix your two parts before applying. It's 100x easier than removing poorly mixed product.
How thick of a layer can the epoxy be poured. I want to build a clear counter top approx. 2 inches thick. Is this thee correct product to use? does the product have structure after a extensive cure period?
ozzie on Mar 5, 2020
BEST ANSWER: If you try to pour 2" thick it will most likely smoke, discolor, and crack. The suggestion is to do it in stages, 1/4" at a time. When the previous layer is tacky you can pour the next 1/4". This way heat will not build up. Also use 207 special Gardner with 205 resin.
Will it damage router bits?
John U on Jan 4, 2019
BEST ANSWER: No it will Not
Do you have to cover West system on a boat deck?
John W on Sep 15, 2018
once cured, what is it's temperature rating?
HIran P on Nov 10, 2018
Trying to fill curved cracks on burls with epoxy unable to control flow of epoxy?
Susie H on Nov 2, 2018
Can this be used to stabilize spalted lumber and if so can it be cured via heat instead of hardener?
Adam40 on Jul 3, 2017