West System 206-B Slow Hardener - 1 Quart

Part# 01-00360
MFR Model# 318394


WEST SYSTEM brand resins and hardeners, form a two-part epoxy system developed by Gougeon Brothers specifically for wood and composite construction. WEST SYSTEM epoxy is recommended by Rutan Aircraft Factory for certain homebuilt aircraft applications, particularly where a moisture resistant epoxy is desired. 105 Resin is the base material on which all of the WEST SYSTEM epoxy systems are built. The resin is a clear, light amber, low-viscosity liquid. It is designed specifically to wet out wood fiber. With roller applications, it possesses excellent thin film characteristics in flowing out and is self-leveling without fish-eyeing. Its relatively high flash point makes it safer to work with than polyesters. It can be cured in a wide temperature range, then sanded and shaped. It cures quite clear so that the natural finish shines through.

205 Fast Hardener, when mixed with the 105 Resin in a ratio of 5 parts Resin to 1 part Hardener, yields a high-strength, rigid solid with excellent cohesive properties and provides an excellent moisture vapor barrier. The 105 Resin/205 Fast Hardener has a pot life of 10-15 minutes at 70F. It is also recommended in coating applications where natural finishing is desired. Partial cure time at 70F is 5-7 hours. 206 Slow Hardener is a low-viscosity mixture of polyamines. The 105 Resin/206 Slow Hardener has a pot life of 30-40 minutes at 70F. It is normally used when extended time is needed for large coating and bonding applications. It is especially well suited to working in warmer climates. Partial cure time is 9 hours at 70F. Order by size and hardener. Pump sold separately.
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Choose from a variety of additives to customize the mix.

  • 105 Epoxy Resin can be mixed with a variety of fillers and additives to suit specific needs, such as sag resistance, sandabilty or to increase its strength. Specific fillers also can be used to convert 105 Epoxy Resin into an excellent adhesive to suit a wide variety of bonding needs.

  • Choose from a variety of additives to customize the mix.

  • The cure rate of 105 Epoxy Resin can be adjusted to ambient temperature and desired working time. Three hardeners are offered: 205 Fast, 206 Slow, 209 Extra Slow and 207 Special Clear Hardener. 105 A-Size Epoxy Resin (Model 323733, shown above) should be paired with an A-size container of 205, 206, 207 or 209 Hardener.

  • Use dispenser pumps to get the mix right

  • Mixing 105 Epoxy Resin at the correct ratio is critical. Calibrated pump sets are offered for accurate metering of all Group Size A, B, and C WEST SYSTEM and hardeners.
  • Specifications

    Best Use Slow Hardener for 105 Epoxy Resin
    Capacity 0.86 Quart
    Cure Time 10 to 15 Hours (Working Time 90-110 Minutes) at 72 F
    Type Hardener

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    Wayne N Verified Purchase


    July 20, 2023


    Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

    Q: is the 206 hardener able to be used with another epoxy resin like R1307LV

    We are unsure on this as there has been no testing data to know how it would react with other mfg. resins. We recommend to stick with the same manufacturer that the hardener recommends to be used with.

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