West System 205 Fast Hardener is a low-viscosity epoxy curing agent for use when shorter working and cure time is needed or to provide adequate working time at cooler temperatures.
At 72-degrees, 205 Fast Hardener will have a 9-12 minute Pot Life. When combined with WEST 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.
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Mix Ratio, Resin:Hardener
5:1 by weight or volume
Pot life at 72 F (22 C)
9 to 12 minutes
Cure to a solid state
6 to 8 hours
Cure to maximum strength
1 to 4 days
Minimum recommended temperature
40 F (4 C)
WSY 300, 306-25 or 309
Rate Of Cure:
I am looking to apply closet cedar planks to my bathroom drywall ceiling. It is a moisture prone area because it contains both the shower and tub and I live in a humid area. I am curious if this epoxy product West Systems is recommended for this use as I would like it to last my lifetime? The area is approximately 75 square feet....any idea on how much I might require for an area this size if this is a good choice? Thank you. Aloha, LaRen
LaRen Antoine Cummiskey
A quart kit should do one coat. You could thin it a little with acetone for better penetration.
How much 205 hardener to a gallon of 105 resin?
The ratio is 5 to 1. You would need to do the math, less than a quart bu more than a pint. It would be kind of an odd number since it is 5 to 1.I always do small batches with measuring spoons.
The ratio is five parts resin to one part hardener.
Are there any side affects using 205 when sanded as in rash , itchy ?
I had a reaction which caused excessive swelling of my face. My eyes swelled shut for 36 hours. Not from sanding, but from the curing, de gassing of the resin and hardener drying.
I use it frequently in the colder weather with no problem. However, if you need to use it cover up and use a dust mask or respirator when you sand.
can I mix 205 fast hardner with 207 slow hardner?
I think it would depend where you live and the temperature you're using it. I would think that you could but it would take a lot longer to cure. Don't mix them together, use the pump and do a 50/50 mix. Do 1 pump of 205 then one pump of 207 to two pumps of resin. I don't know for sure because I've never used the slow hardener
Mixing the hardeners results in a cure time in between the two.
I have never done this but i think it would probably work as long as the proper portions are maintained. There's a chance the mixture could shorten the pot life, but i hypothesize that the strength of the bond will not be affected.
yes, but it will harden very fast, faster than the fast hardener alone, and it will generate a lot of heat.
J ROBERT KLINGER
It's west system it almost works without you
Couldn't ask for better service for proven products.
West system epoxy is the best, the service frome Jamestown Dist. exceeded expectations. Thanks
Fantastic epoxy. This will hold up to anything!
A Great product and always dependable
A very dependable product. I've used it in many different applications and has never let me down.
West is best...
If 17th and 18th century English Admiralty shipbuilders could have used epoxy for frigates, man-o-wars, ships of the line, they would have.
West System would have been used by British Admiralty shipwrights in the 17th century if it were available. I'm glad to be able to use it now.
When all else fells I use the west system
The key is the ratio
First time: mix only a small amount-2 or 3 ounces. Use the right ratio! Get a feel for the harding time and your tools.
Very good product
Easy to use - buy the pumps! Runs a little on vertical serfaces - need to use multiple coats. Really easy mixing w. the pumps
Worked better than I expected.
"Fast" was slower then expected, which was a plus for a difficult glue-up. Loved the despensers; quick, clean, accurate! Easier to use than any previous products. Piano back frame strength is restored and ready for the next century. Ordered another kit for the next job.