West System 206 Slow Epoxy Hardener (.86 qt)

206 Slow Hardener is a low-viscosity epoxy curing agent for use when extended working time or a longer cure time is needed. It also provides adequate working time at higher shop temperatures. When combined with 105 Resin in a five-part epoxy resin to one-part hardener ratio, the cured resin/206 Slow Hardener mixture yields a rigid, high-strength, moisture-resistant solid with excellent bonding and barrier coating properties. 206 Slow Hardener is not intended for clear coating.

Key Highlights:

Pot Life at 72F (22C): 20 to 25 minutes
Cure to a Solid State: 10 to 15 hours
Cure to Maximum Strength: 1 to 4 days
Minimum Recommended Temperature: 60°F (16°C)
105/206 Epoxy

105/206 Epoxy is used for general coating and bonding applications when extended working and cure time are needed or to provide adequate working time at higher temperatures.

105/206 forms a high-strength, moisture-resistant solid with excellent bonding and barrier coating properties. It will wet out and bond to wood fiber, fiberglass, reinforcing fabrics, foam and other composite materials, and a variety of metals.

105/206 Epoxy can be thickened with WEST SYSTEM fillers to bridge gaps and fill voids and can be sanded and shaped when cured. With roller applications, it has excellent thin-film characteristics, allowing it to flow out and self-level without “fish-eyeing.” Multiple coats of 105/206 Epoxy create a superior moisture barrier and a tough, stable base for paints and varnishes. It is formulated without volatile solvents resulting in a very low VOC content. It has a relatively high flash point, no strong solvent odor and does not shrink after curing. It is not intended for clear coating natural finished wood.

No Need for Excessive Clamping Force

Unlike traditional wood glues, WEST SYSTEM 105 Resin-based epoxy mixtures including 105 Resin and 206 Slow Hardener are stronger than wood or many other substrates. Because of this, it is beneficial to have some epoxy between the objects you are gluing together. As long as the parts are held in place and epoxy is contacting the entire surface of both substrates, no clamping pressure is needed. With epoxy, the goal clamping is to simply ensure the epoxy contacts the entire surface for the duration of the cure time. Moderating clamp force is all that is required.

If an epoxy filler is not used and a high clamping force is used, the result can be a glue-starved joint which will make bond failure much more likely. Glue starved joints are weaker than their counterparts. Avoid glue-starved joints by following the one- or two-step bonding method.

Group Sizes

WEST SYSTEM Epoxy resin and hardeners are packaged in three “Group Sizes." For each container size of resin, there is a corresponding sized container of hardener. When purchasing resin and hardener, be sure both containers are labeled with the same Group Size letter (A, B or C).

Hardener Selection Controls Cure Time

An epoxy’s open time and overall cure time govern much of the activity of building and repairing with epoxy, and hardener selection is crucial to determining open time and cure time. Open time dictates the number of minutes available for mixing, application, smoothing, shaping, assembly, and clamping. Epoxy cure time dictates how long you must wait before removing clamps, or before you can sand or go on to the next step in your project.

Hardener Cure Speed

Each WEST SYSTEM Epoxy hardener has an ideal temperature cure range. At any given temperature, each epoxy resin/hardener combination will go through the same cure stages but at different rates of speed. Base your hardener selection on the amount of working time you’ll need for the job you’ll be doing at the temperature conditions you’ll be working under.

West System 206 Slow Epoxy Hardener (.86 qt)

• Dimensions: 9.0 inches (H) x 9.0 inches (W) x 9.0 inches (L)
• Weight: 1.0 pounds

• Made in United States