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WEST SYSTEM #205 Fast Hardener

Get the working time you need for the temperature and conditions you’re working in. #205 Fast Hardener, mixed at a 5:1 ratio with #105 resin, results in a pot life of 9-12 minutes at 72°F, with solid cure in 6-8 hours. It has a minimum recommended working temperature of 40°F.

Mixing WEST SYSTEM resins and hardeners at the correct ratio requires the use of a pump kit, sold separately. For hardeners #205 (Fast) and #206 (Slow) in Group Sizes A, B and C, select the #300 Mini Pump Kit, Model 3405669. For larger group sizes of #205 and #206, use the “Model A” #306-25, Model 335703.

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 300, 306-25
Customer Reviews
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
#205-A Fast Hardener, 0.44pt. 318360 205-A
In stock online.

$21.99

#205-B Fast Hardener, 0.86qt. 318378 205-B
In stock online.

$47.99

#205-C Fast Hardener, 0.94gal. 323741 205-C
In stock online.

$154.99

#205-E Fast Hardener, 11.31gal. 326108 205-E
In stock online.

$1,199.99

Product Description

Get the working time you need for the temperature and conditions you’re working in. #205 Fast Hardener, mixed at a 5:1 ratio with #105 resin, results in a pot life of 9-12 minutes at 72°F, with solid cure in 6-8 hours. It has a minimum recommended working temperature of 40°F.

Mixing WEST SYSTEM resins and hardeners at the correct ratio requires the use of a pump kit, sold separately. For hardeners #205 (Fast) and #206 (Slow) in Group Sizes A, B and C, select the #300 Mini Pump Kit, Model 3405669. For larger group sizes of #205 and #206, use the “Model A” #306-25, Model 335703.

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 300, 306-25

Specs

REVIEW SNAPSHOT®

by PowerReviews
West System#205 Fast Hardener
 
4.7

(based on 6 reviews)

Ratings Distribution

  • 5 Stars

     

    (4)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to use (6)
  • Protects well (6)
  • Weather proof (5)
  • Visually pleasing (3)

Cons

No Cons

Best Uses

  • Outdoors (4)
  • Indoor (3)
  • Quick fix (3)

Reviewed by 6 customers

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Displaying reviews 1-6

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5.0

205-B

By Jim

from Hubert, NC

About Me Casual/ Recreational

Verified Buyer

Pros

  • Easy to Use
  • Protects Well
  • Visually Pleasing
  • Weather Proof

Cons

    Best Uses

      Comments about #205 Fast Hardener:

      Performs awesomely when mixed with 105 Resin.

      • Was this a gift?:
      • No
       
      4.0

      Not to bad

      By Kyle

      from Marthas Vineyard

      About Me Advanced

      Verified Buyer

      Pros

      • Easy to Use
      • Protects Well
      • Weather Proof
      • Works Well

      Cons

      • Costly
      • Messy

      Best Uses

      • Outdoor

      Comments about #205 Fast Hardener:

      Used to replace the floor in my boat.

      • Was this a gift?:
      • No
       
      4.0

      Go West young man..

      By Robert

      from South Lake Tahoe, Ca.

      About Me Professional

      Verified Buyer

      Pros

      • Easy to Use
      • Protects Well
      • Visually Pleasing
      • Weather Proof

      Cons

        Best Uses

        • Engine
        • Indoor
        • Outdoor
        • Quick Fix
        • Wood Trim

        Comments about #205 Fast Hardener:

        If you have never invested in the "west System" you are missing out on an amazing product line. I will NEVER be without my west; I still find new and wonderful uses after 20 years. One of my all time favorites is drilling a hole slightly bigger then a brass wood insert and after wetting the surfaces to be bonded and coating the screw with Pam or a drop of oil; then mix up enough #405 until it becomes like peanutbutter and bed the insert using the screw wound down to the bottom of the insert and align. It will be stronger and a perfect fit every time! There are many tutorials out there and the only caution I see is if exposed to the sun- top coat with a good UV varnish, as otherwise it will in time become milky in color and break down. Yesterday I hand cut a very tiny teak box and taped it togeather layed in the volt meter and filled it with west. Today finish sand and using the wires I will dip it in the varnish can, mist with thinner if needed and rotate until even and let dry..handsome bullet proff volt meter! I would be lost without west, a definant must have for a waterproof, strong, veristal, repair of any kind.

         
        5.0

        The Fast Hardner is Great!

        By Big Dog

        from Grand Lake Oklahoma

        About Me Advanced

        Verified Buyer

        Pros

        • Easy to Use
        • Protects Well
        • Very easy to use
        • Weather Proof

        Cons

        • Messy
        • Smelly As In It Stinks

        Best Uses

        • Fiberglass Epoxy Repairs
        • Indoor
        • Outdoor
        • Quick Fix

        Comments about West System #205-a Fast Hardener, 0.44pt.:

        I have used this alone as a Fast hardner and together with regular hardner to increase epoxy resin setup/cure times. When used alone you must be prepared to act quickly. Get your ducks in row before starting! Because when it starts to setup and cure you will not have a moment to spare before it gets hot and hard. It is fast! When used with the regular hardner I replaced about 20% with the fast and it made my cure to sandable times between patchs a little more reasonable. It stinks but works great!

        (1 of 2 customers found this review helpful)

         
        5.0

        Great product

        By straight shot

        from wi

        About Me Casual/ Recreational

        Verified Buyer

        Pros

        • Easy to Use
        • Protects Well
        • Visually Pleasing
        • Weather Proof

        Cons

          Best Uses

          • Outdoor
          • Wood Trim

          Comments about West System #205-a Fast Hardener, 0.44pt.:

          I recieved this in just a few days

          (1 of 3 customers found this review helpful)

           
          5.0

          NOT SO FAST HARDENER

          By cmc6363

          from long island,ny

          About Me Beginner

          Verified Buyer

          Pros

          • Easy to Use
          • Protects Well

          Cons

          • None

          Best Uses

          • Indoor
          • Quick Fix

          Comments about West System #205-a Fast Hardener, 0.44pt.:

          I USED 105 AND 205 ALONG WITH THE MATCHING PUMPS,& FIBERGLASS MESH ;TO FIX A LEAD BEND PIPE ON A 100 YEAR OLD HOUSE.THE DIRECTIONS ONLINE WHERE GREAT AND I EVEN CALLED THE COMPANY FOR ADVICE,THEY WHERE ALSO VERY HELPFUL. THREE WEEKS LATER THE WHOLE IS STILL SEALED. IT'S GREAT TO WORK WITH AND I CAN'T FIND ANY THING WRONG WITH IT.

          Displaying reviews 1-6

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