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Product Details

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.

Important: Not intended for clear coating applications. For clear coating applications, we recommend TotalBoat High Performance Epoxy.

Note: TotalBoat 5:1 Fast Hardener is also available in a 10.4 gallon container, for use with 55 gallon drums of 5:1 resin. Please contact us for pricing.

Tech Specs
Hardener Color Amber (not intended for clear coating)
Mix Ratio by Volume 5A to 1B
Mix Ratio by Weight 100A to 18B
Minimum Recommended Temperature 40°F
Pot Life at 75° F 12 minutes
Work Life at 75° F (Thin Film) 60 minutes
Set Time at 75° F (Thin Film) 6 hours
Cure Time at 75° F (Thin Film) 1 to 4 days
Tensile Strength 8,000 psi
Tensile Modulus 410,000 psi
Tensile Elongation 3.5%
Compressive Strength 11,500 psi
Flexural Strength 14,400 psi
Flexural Modulus 460,000 psi
Volumetric Shrinkage 4.4%
Hardness, Shore D 84
Info & Guides
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.

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.

Reviews for TotalBoat 5:1 Fast Hardener

6 of 6 Reviews

January 11, 2021

Good value
By Crooked Eye from West coast

Verified Purchase

This product is comparable to other epoxies I have used and a little less expensive. It seems to take a while longer to set up than the West System products. The size I purchase, 25 oz , seems like it is used up and the resin, 127 oz, has some left over.

Bottom Line Yes, I would recommend to a friend

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November 7, 2018

Handled the cooler weather just fine.
By Dunbar from Portsmouth R. I.

Verified Purchase

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.

Bottom Line Yes, I would recommend to a friend

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July 8, 2018

maybe
By Beluga from Sagamore Beach, Ma.

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.

Bottom Line Yes, I would recommend to a friend

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March 22, 2018

Repairing fiberglass dingy
By TJ from Bentonville Ar

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.

Bottom Line Yes, I would recommend to a friend

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February 10, 2017

Great quality & price
By Simiantoastcrunch from Long Island, NY

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.

Bottom Line Yes, I would recommend to a friend

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August 19, 2014

Great Epoxy for all woodwork
By MICHAELL from PEMBROKE, MA

Verified Purchase

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.

Bottom Line Yes, I would recommend to a friend

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