Catalyst Ranges for 301, 301W, 302, 303 & 305 Resins
- Uses LBI-321 MEKP
- 5-15cc per Quart of Resin, 20-60cc per Gallon of Resin.
- This range is between .5%-2%
Catalyst Ranges for 304, 306, 307, 308 & 309 ISO Gelcoats
- Uses LBI-321 MEKP
- 10-20cc per Quart of Resin, 40-80cc per Gallon of Gelcoat.
- This range is between 1%-2%.
Catalyst Ranges for 901, 902, 585, 555 & H197P Resins
- Uses LBI-391 MEKP(H197P uses LBI-321)
- 15-30cc MEKP per quart of resin, 60-120cc MEKP per Gallon of Resin.
- This range is between 1.5%-3.0%
A Guide for Catalyst Levels
- The amount of catalyst added to the resin determines how hot the reaction gets.
- Heat is what causes the resin to cure.
- In cool weather (55-60F) catalyze resins in the mid to high range:
- 301, 301W, 302, 303 & 305 resins at 10-15cc per quart, 40-60cc per gallon
- ISO Gelcoats at 15-20cc per quart, 60-80cc per gallon
- 901, 902, 585, 555 & H197P 20-30cc per quart, 80-120cc per gallon
- In hot weather (75-90F) catalyze resins in the low to mid range:
- 301, 301W, 302, 303 & 305 5-10cc per quart, 20-40cc per gallon
- ISO Gelcoats 10-15cc per quart, 40-60cc per gallon
- 901, 902, 585, 555 & H197P 15-20cc per quart, 60-80cc per gallon.
- Fiberglassing below 50F is not recommended unless you have some method of warming the resins and materials to room temperature(See Fiberglassing in Cold Weather Tech Guide)
- If your resin is still hardening too quickly in higher temperatures try chilling your resin in a cooler or refrigerator(DO NOT FREEZE YOUR RESIN!)
- REMEMBER: THE MORE CATALYST YOU USE AT A GIVEN TEMPERATURE THE FASTER THE CURE!
- NEVER CATALYZE RESIN BELOW THE MINIMUM RECOMMENDED QUANTITY!
- BE ORGANIZED AND HAVE ALL YOUR TOOLS AND SUPPLIES READY! ONCE CATALYZED, RESIN WAITS FOR NO ONE!