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Product Details

West System 206 Slow Hardener is a low-viscosity epoxy curing agent for use when extended working and cure time is needed or to provide adequate working time at higher temperatures.

At 72-degrees, 206 Slow Hardener will have a 20-25 minute pot life. When combined with 105 Resin in a five-part resin to one-part hardener ratio, the cured resin/hardener mixture yields a rigid, high-strength, moisture-resistant solid with excellent bonding and coating properties.

Not intended for clear coating applications.

Tech Specs
Mix Ratio, Resin:Hardener5:1 by weight or volume
Pot life at 72 F (22 C)20 to 25 minutes
Cure to a solid state9 to 12 hours
Cure to maximum strength1 to 4 days
Minimum recommended temperature60 F (16 C)
Pumps required300, 306-25 or 309

Reviews for WEST System 206 Slow Hardeners

10 of 25 Reviews

February 16, 2023

Plenty of working time
By Larry from Grottoes, VA

Verified Purchase

I use this epoxy to do furniture repairs. It's the best I've used. This hardener gives plenty of working time to get things right.

Bottom Line Yes, I would recommend to a friend

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February 12, 2023

The best stuff, but its fatally toxic w/o PPE
By Marine Machinist from NJ

This epoxy is what we use on shafts for ships to protect them from rust, and it works extremely well, but the stuff thats in the SDS is extremely toxic compared with other epoxies, if you take a whiff of this stuff or have a large surface area of wet epoxy that is uncured the diethylenetriamine poisoning can easily kill you. My lungs were filling with fluid 24hrs after I was fiberglassing a tailshaft for a ship.

Bottom Line Yes, I would recommend to a friend

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August 11, 2022

Always works
By Bobs from Athens, GA

Verified Purchase

Always good


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February 9, 2022

Consistent excellent quality
By Shawn from Michigan

Verified Purchase

I never worry about the fiberglass portion of my boat building because of the west system of products.

Bottom Line Yes, I would recommend to a friend

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August 25, 2021

206 Slow Hardener
By Chuck from Jenkins Boat Works

Verified Purchase

Being summer, I really want the extra pot life time that this slower hardener allows. It also has little or no blush when cured and even as a slow hardener, usually set up to the touch in 12 hours

Bottom Line Yes, I would recommend to a friend

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May 8, 2021

WebSite Picture Misleading - Caused Incorrect Order
By G Ag from Farmington, UT

I purchased online a gallon of West System 105. When I was making my online order I selected the web page for the 206 hardener . The web site came up with a picture of the 0.87 quart size of hardener next to which was the description (I didn't notice the description was for the "A" size) inadequate for the gallon of 105 I purchased. I didn't notice the error until the shipment arrived with a gallon of 105 and about one cup of 206. This mis-leading web sit photo caused an error that has delayed my project. The photo on the web site should match the description and change when you select a different size.

Bottom Line Yes, I would recommend to a friend

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July 16, 2020

strong bond
By jive from Vermont

Verified Purchase

I have used the resin and both 205 and 206 hardener for many years for boat repairs and custom door making . The bond is very strong.

Bottom Line Yes, I would recommend to a friend

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January 29, 2020

West System slow hardener
By Chuck from Lawson, Missouri

Verified Purchase

Even though it is winter, I still use the slow hardener. I just don't like to have my pot go off before I"ve used all that I mixed. This stuff is excellent.

Bottom Line Yes, I would recommend to a friend

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March 8, 2019

GREAT SERVICE!
By Richard from Louisville, KY

Verified Purchase

Great Service, even for small orders!

Bottom Line Yes, I would recommend to a friend

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November 16, 2017

West System is great
By Hutch from Plainfield, Vermont

Verified Purchase

I have been using West epoxy for decades. I have used it for sailboat maintenance, radio antennas, car bodywork, building repairs, toys to timbers. Anything that needs to be filled and faired. The ability to select a hardener for speedy hardening or extended working time is a great advantage. I have used soft filler to repair wooden items like the rotted frames of very large windows that I got free to install in the barn workshop. Once filled they are stronger than wood and impervious to weather for a long time. I have pumps that I occasionally use if I want perfect proportions. But I usually just slop some resin and hardener in approximate proportions into a mixing tray, and for mot purposes it works very nicely. The measurements would probably be more economical and perhaps produce a better finished product but for most jobs I don't bother. The pumps leak as temperature changes expand the pressure in the cans. A sturdy end cap on the pumps would help. I've tried electrical wire-nuts and they are marginally effective. The pumps are messy, and usually spend their time on essentially empty cans.

Bottom Line Yes, I would recommend to a friend

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