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TotalBoat 5:1 Slow Hardener is a low-viscosity epoxy curing agent for use when extended working and cure time is needed or to provide adequate working time at higher temperatures. Use with both TotalBoat 5:1 Epoxy Resin and all traditional 5:1 epoxy brands.
At 75°F, our Slow Hardener will have a pot life of 20 minutes. When combined with TotalBoat 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.
WARNING: The TotalBoat 5:1 Epoxy Slow Hardener can expose you to chemicals including bisphenol A, which is known to the State of California to cause female reproductive toxicity. For more information, go to www.P65Warnings.ca.gov
Rate Of Cure:
how much 5:1 slow harder do I need for a gallon of epoxy?
5 parts resin to one part hardener. A gallon container is labeled size B. The correct size hardener is also labeled size B. It is approximately 25 ounces.
TotalBoat 5:1 Slow Hardener ,Description Size A says 6 oz. in dropbox but also says 1 Pint So it should read 16 oz.
Don From Michigan
The epoxy is mixed at a ratio of 5 parts resin to 1 part hardener. One quart of resin is 32 ounces so you mix approximately 6 ounces of hardener.
Will this work for an indented part of my deck which has been stressed and sunken about 1/16 of an inch around as stanchion?
Well, with filler it would fill the indented area. However, the indented area indicates that there is a cause for the indentation which you really need to address. Not seeing the area I can't render an opinion. My first reaction to the condition was to think you have a deck core problem. Usually, that is from water getting into the core from a stanchion mounting fastener. Older boats used cork cores in many cases. If allowed to soak up moisture the cork becomes "goo" and will not support a load. Removing the stanchion and probing the area inside the fastener hole should tell you a lot.
I've only used my TotalBoat for laminating, but I think that it should work for fairing or backing a new stanchion. I used mine in Florida at about 80-85 degrees so it set up quickly. The 20 minutes they talk about is good if the temp is < 75 degrees, but if you are in a warmer climate, you may need to hustle. I would recomment coating the base of the ding with a pure coat to get it to bond with the substrate before putting in the thickened epoxy. I used wood flour for a thickener, but some would suggest using balloon colloidals. I don't have experiece using the latter. Good luck on your project. Cheers.Dan Mannschreck
Is this hardener amber colored?
It is clear out of the new container. Like the West system I suspect it may discolor after humid air comes in contact. If you are referring to a clear coat on wood for a bright finish You should not have any problem.
Total Boat epoxy compares to West Marine epoxies . I find no difference between the two except for the price. Use this at the correct temp range and you will be happy.
Ozark , Al
Easy to use even in warm SC weather
As a first-time 'glasser, I was concerned that it would be too warm and the resin would set before it was spread and smooth. TotalBoat 5:1 Slow Hardner performed as described in TotalBoat Product Guide giving me plenty of working time even though the temperature was over 80 (in October).
Fountain Inn, SC, USA
I would and have bought this product again.
Bought fast hardener first but found I wasn't that fast on the application. This made a huge difference with the pot time. Works great. I highly recommend it.
John the Manatee Restorer
just right for temps 90-75 deg. enough working time and ready to go the next day
Tom boat maker
Nice to have enough time to work larger areas.
Used 5:1 Total Boat to replace Transom in a 14' Monark, 1974, that I am restoring. Purchased the Gallon size kits several times, works well. Easy to use and easy to shape and sand. My only wish, is that the Hardener was larger in size. I use that 5:1 ratio and always run out of Hardener before the Resin... Approximately 2 quarts of Resin left....
Gary L. Sr.
Saint Maries, Idaho
Great Hardener just wish there was more
Mixed, using the 5:1 System, works Great. My only trouble, I end up with a least a + Quart of Resin. Wish you Hardener size would be 36 ozs. I usually mix using the measured containers with the 5:1 system equaling 8 ozs. and, as stated, end up with + Quart of Resin left.
when they say slow believe it!
I just built a Michelak Larsboat tandem kayak using this epoxy system. I needed some more epoxy and was going to get some MAS epoxy as I had used it before. While In the store I saw the total boat and decided to try it as the price was much better. The guy at the counter said fast hardener might be too fast for me, I found slow to take forever. I had to keep scraping the runs off for what seemed like e half hour after each seam was wet out. If you live where it hits 100 degrees for more than a few hours a year, or work in the hot sun, slow might work for you. If you build in a nice cool new england basement, get the fast hardener. For those runs that you hate, and redoing fiberglass epoxy or paint on a wooden boat, get the Wagner paint eater, I've used it to redo runny seams and repaint boats. It takes epoxy, paint and fiberglass off, but won't touch the wood unless you hold it there for long after the paint is gone. I could still read my pencil marks just like the hull had never been painted.