TotalBoat Fast Hardener is a low-viscosity epoxy curing agent for use when shorter working and curing times are needed. Our 5:1 Fast Hardener provides adequate working time at cooler temperatures. Use with both TotalBoat 5:1 Epoxy Resin and all traditional 5:1 epoxy brands.
At 75°F, TotalBoat Fast Hardener will have a pot life of 12 minutes. When combined with 5:1 Epoxy Resin in a five-part resin to one-part hardener ratio, the cured resin/hardener mixture yields a rigid, high-strength, moisture-resistant solid with excellent bonding and coating properties.
Note: Not intended for clear coating applications. For clear coating applications, use TotalBoat Traditional Epoxy Resin with TotalBoat Crystal Clear Hardener.
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Note: Epoxy pumps may not be compatible between brands. If using TotalBoat Hardener with an alternate brand of epoxy resin, be sure to confirm accurate mixing ratios based on the exact quantity each pump will yield.
For a side-by-side comparison of the physical and handling properties of TotalBoat Fast and Slow Hardeners, please click the 5:1 Epoxy Resin & Hardeners Tech Data link.
Amber (not intended for clear coating)
Mix Ratio by Volume
5A to 1B
Mix Ratio by Weight
100A to 18B
Minimum Recommended Temperature
Pot Life at 75° F
Work Life at 75° F (Thin Film)
Set Time at 75° F (Thin Film)
Cure Time at 75° F (Thin Film)
1 to 4 days
Hardness, Shore D
Important Safety Information
Always wear protective clothing and equipment to protect your eyes, skin, and lungs when working with TotalBoat Traditional Epoxy Resin and Hardeners. Personal protective clothing should include appropriate gloves, safety glasses or goggles, a proper respirator, and a proper apron or similar protective clothing.
Rate Of Cure:
What is the best solvent to thin this resin/hardener combination?
You could thin it a little with acetone. I wouldn't go more than 10%.
Yep, I figured acetone would be the right choice.
I want to make it very thin to penetrate into rot before using your filler epoxy. I did this years ago with resin but it was not yours so before buying yours I'd like to know the best thinner. I used acetone in the last repair.
Randy, I think an expert should chime in, but in my own experience I found the solution with the slow formula hardener was thinner than with the fast formula. I used some of the slow curing solution to fill in some wood rot, and it seemed to run well into the seams/voids. Unfortunately I don't have results to share. Good luck!
What solution property are you trying to achieve by thinning the mixture?
Handled the cooler weather just fine.
This was the first time I used this product line on a non-marine repair. Had wood repair on house bay window and the lateness of the season required use of a faster hardener to compensate for the lower temperature. Worked exactly as expected and I achieved same results as I have when working in mid summer.
Portsmouth R. I.
Bought smallest size twice and used with 5:1 pump kit. Both times ran out of hardener way before resin. Not even close. Like plastic containers so may buy over west system but need for extra hardener makes it not cost effective. Used all in same day the second time so not a seepage out of the pump issue. Product is fine.
Sagamore Beach, Ma.
Repairing fiberglass dingy
Great for preparing to replace rub rail trim. Used to fill previously drilled 1/8" holes and ragged edges. Fiberglass cloth was used on torn edges for a tough sandable edge. Make sure ascertain correct temperature for slow, med, fast in terms of hardner.
Great quality & price
This is the first time I used any type of resin. Based on a comparison with other products that friends have used, the TotalBoat hardener and epoxy can keep up with all the more expensive brands.
Long Island, NY
Great Epoxy for all woodwork
The calibrated pumps make it easy to use small or large amounts. It sets in an hour or two in warm weather so portioning is very helpful. I have learned to mask off surfaces around the work so I don't get spillage onto something I don't want. Drips and spills should be removed in bulk with a scraper ASAP then clean off with lacquer thinner. (So if it's an all ready painted surface, it should have been masked off). Otherwise it dries hard enough to sand. I learned that using gloves saves a lot of clean up time. If you don't and it's still tacky on your hands, lacquer thinner will work. If it dries, it will ware off eventually. I now use it for most all my woodworking joints.