West System 206 Slow Hardener is a low-viscosity epoxy curing agent for use when extended working and cure time is needed or to provide added adequate working time at higher temperatures. Pot life: 20-25 minutes. Cure to a solid state: 10-15 hours. Cure to maximum strength: 1-4 days. recommended temperature: 60 deg. F (16 deg. C). HAZARDOUS FREIGHT! An additional $28.50 hazardous fee will be applied to your order at time of shipment. Haz fee will not appear on your email order confirmation, but will be on your invoice.