PRO-SET LAM-237 Extra-Slow Laminating Hardener


This listing is for PRO-SET LAM-237-1 Hardener Only. You will need to purchase one of the PRO-SET Laminating Resins below to use with this hardener.

PRO-SET LAM-125 Low Viscosity Laminating Resin
PRO-SET LAM-135 Medium Viscosity Laminating Resin
PRO-SET LAM-145 Thixotropic Laminating Resin

** If any of the above links do not take you to a product listing, it would indicate that product is not in stock.

Please Note: This item requires HAZMAT shipping. An additional fee will be added to shipping cost during checkout.

PRO-SET Laminating Epoxies are a versatile system of liquid resins and hardeners designed to meet a wide range of wet lay-up laminating applications.



Any Standard PRO-SET Laminating resin may be combined with any PRO-SET Laminating hardener to create a "custom" epoxy blend. PRO-SET Laminating hardeners range from fast to extra slow and may be blended to provide even greater versatility with your custom processes.

Choose resin by viscosity and hardener by speed. To simplify the choice, Standard PRO-SET Laminating resins and hardeners are priced the same (except for High-Temp).


Use PRO-SET Laminating Epoxies to produce lightweight, high performance composite structures that will withstand long-term cyclic loading in the harshest environments. These epoxies bond to core materials, wood, metal and all reinforcing fabrics. They offer excellent moisture resistance, toughness and superior resistance to heat and fatigue. PRO-SET Laminating Epoxies develop excellent physical properties at room temperature and may be post-cured for enhanced performance.

Laminating Epoxies can by dyed, upon request, to provide for visual quality control. A yellow dye in the resin and a blue dye in the hardener, when properly metered and thoroughly mixed, will result in a consistent shade of green.

LAM Hardener Selection

Property Standard LAM-224 Hardener LAM-226 Hardener LAM-229 Hardener LAM-237 Hardener LAM-239 Hardener1 LAM-251-HT Hardener1
150g Pot Life @ 77°F (25°C) ASTM D2471 13 min 52-59 min 93-100 min 128-163 min 165-250 min 164-253 min
500g Pot Life @ 77°F (25°C) ASTM D2471 12 min 45-52 min 73-84 min 102-107 min 110-165 min 124-175 min
Approx. working time @ 77°F (25°C)   40 min 2-3 hr 4-5 hr 7-8 hr 10-12 hr 7-8 hr

Hardeners can be blended for intermediate cure times
1 1 Not to be blended with other hardeners. Additional Post Cure Required.


TDSPRO-SET LAM-125 Epoxy with LAM-237 Hardener TDS
TDSPRO-SET LAM-135 Epoxy with LAM-237 Hardener TDS
TDSPRO-SET LAM-145 Epoxy with LAM-237 Hardener TDS

PDF Epoxy Mixing Guide