WEST System
WEST SYSTEM 205 Fast Hardener
WEST SYSTEM 205 Fast Hardener
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Product Details
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 as low as 40F.
At 72F, 205 Fast Hardener will have a 9-12 minute Pot Life. The ideal mixing ratio is five-part WEST 105 Resin with one-part hardener for a stable mix. This cured resin/hardener mixture yields a rigid, high-strength, moisture-resistant solid with excellent bonding and coating properties. To ensure the right resin-to-hardener ratio, use the WEST SYSTEM 300 Mini Pump Set for accurate metering.
Not intended for clear coating. Available in pint, quart, and gallon sizes.
Tech Specs
| Specifications | Values |
|---|---|
| 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) |
| Pumps required | WSY 300, 306-25 or 309 |
| Project Uses | Marine, Boat Repair, Adhesion, Fabrication, Molding, Furniture, Casting |
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Reviews
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Questions
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1 - 10 of 11 Questions
Q: What is the usable temp range of the fast hardener?
3 years ago1 Answer
A: The minimum working temperature is 40 degrees. At 72 degrees the pot life is 9-12 minutes. In warmer temperatures, the pot life will be reduced and you would want to use 206.
3 years agoHelpful?
Q: I read to fix stress cracks use 105/20x resin. What does the 20x represent. Thank you Burt
3 years ago1 Answer
A: Hello, that 20x must be a typo mistake, West System has 205, 206, 207 and 209 hardeners. The 205(fast) and 206(slow) are most popular.
3 years agoHelpful?
Q: what is the shelf life of 205 hardener opened stored at shop temp 45-95 degrees F +/-
3 years ago2 Answers
A: I have had my opened containers for five years. Just used it again a few weeks ago and it was fine. Never allowed it to freeze. It does turn a darker amber with and but does not affect hardening.
3 years agoHelpful?
Q: Are there any side affects using 205 when sanded as in rash , itchy ?
9 years ago4 Answers
A: Some of us are sensitive/allergic to epoxy. Actually the hardener I believe. I too swelled up badly until I learned. I must avoid the fumes and skin contact. I get rid of the fumes with a fan blowing fresh air into my work area and use rubber gloves combined with long sleeved work shirt with tight cuffs. I am not a boat builder, I am a hobby woodworker. I am currently using West System 105/207 epoxy. I have no problems when I am careful with skin contact and blowing the vapor away from my eyes and that is easy to do.
Anonymous4 years agoHelpful?
Q: I have two gallons of Hi-Bond Boatyard Resin. I also have the 205 West System fast hardener on hand. ARE THESE TWO COMPATIBLE and if so AT WHAT MIXTURE RATIO?
4 years ago1 Answer
A: If boat yard resin is polyester than no you cannot mix polyester with epoxy resin Tim
4 years agoHelpful?
Q: 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
8 years ago2 Answers
A: Sir: Be certain that you have used ""moisture proof sheet rock "" as a surface to bond with. Any adhesive is only as good as the surface integrity you are bonding with. Perhaps 3/8 ths inch plywood screwed in place will give you the performance you are looking for. If it is that wet, get exterior glue plywood. Once you have a quality subsurface, West system epoxy will do an excellent job of securing your cedar for all time. Best regards, Dan
Anonymous5 years agoHelpful?
Q: I have left over products from various projects, and am wondering if Total Boat 5:1 Fast Hardener is compatible with West Systems 105 Epoxy Resin?
5 years ago1 Answer
A: I am sorry I do not know as am exclusively a West System user. I recommend asking Gougeon Brothers directly.
5 years agoHelpful?
Q: How much 205 hardener to a gallon of 105 resin?
9 years ago2 Answers
A: The ratio is five parts resin to one part hardener.
9 years agoHelpful?
Q: can I mix 205 fast hardner with 207 slow hardner?
13 years ago4 Answers
A: Mixing the hardeners results in a cure time in between the two.
9 years agoHelpful?
Q: How many ounces of fast hardner do you add to 16 ounces of resin 105 resin
4 years ago0 Answers
1 - 10 of 11 Questions