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TotalBoat High Performance Medium Hardener is the curing agent for low-viscosity TotalBoat High Performance Epoxy Resin for most common applications, or if you need it to cure overnight at room temperature.
At 77°F, this non-blushing hardener has a pot life of 25 minutes, is tack-free in approximately 3 hours, and reaches full cure in 3-1/2 days.
Pairing TotalBoat High Performance Resin with the Medium Hardener results in a moisture-resistant solid that cures clear, ideal for clear coating applications. No blush to remove between coats means no time-consuming washdowns & no worrying about whether you removed all the blush, which could cause improper cure.
This Medium Hardener is available in Group Size A (pint), B (half gallon), and C (gallon), to match the group sizes of TotalBoat High Performance Epoxy Resin. This reduces waste and saves you money.
Note: Medium hardener is also available in a 26.1 gallon container, for use with drums of High Performance Resin. Please contact us for pricing.
|Properties (Admixed)||High Performance Fast Hardener||High Performance Medium Hardener||High Performance Slow Hardener|
|Mix Ratio by Volume (Resin:Hardener)||2:1||2:1||2:1|
|Mix Ratio by Weight (Resin:Hardener)||100A:46B||100A:45B||100A:45B|
|Initial Mixed Viscosity at 77°F||650 cP||600 cP||600 cP|
|Gel Time at 77°F (150g mass)||10 min.||25 min.||40 min.|
|Tack-Free Time at 77°F||2 hrs.||3 hrs.||5 hrs.|
|Full Cure at 77°F||2 days||3.5 days||5 days|
|Minimum Recommended Temperature||55°F||55°F||55°F|
|Tensile Strength||7,700 psi||8,000 psi||7,300 psi|
|Tensile Modulus||380,000 psi||390,000 psi||360,000 psi|
|Flexural Strength||11,600 psi||11,600 psi||10,200 psi|
|Flexural Modulus||330,000 psi||360,000 psi||330,000 psi|
|Compressive Strength||9,500 psi||9,900 psi||8,900 psi|
|Hardness, Shore D||84||83||83|
|Intended for Clear Coating Applications?||YES||YES||YES|
|Maximum Pour Depth, Per Layer|
|High Performance Fast Hardener||High Performance Medium Hardener||High Performance Slow Hardener|
|Less than 1/8''||1/8''||1/4'', up to 75°F, for larger pours, slabs|
|1/8'', over 75°F, for larger pours, slabs|
|3/8'', up to 75°F, for smaller castings using up to 1 oz. of epoxy|
|1/4'', over 75°F, for smaller castings using less than 4 oz. of epoxy|
Three Hardener Speeds Let You Control Pot Life and Cure Time
Fast, Medium, and Slow High Performance Hardeners allow you to control the pot life and cure times to suit your particular working conditions.
Even better, you can craft your ideal working properties and pot life by combining the different hardeners with each other, but always remember to maintain the proper ratio of 2 parts resin to 1 part hardener by volume.
Which High Performance Hardener Should I Use?
IMPORTANT! In order to achieve a proper cure, accurate mix ratios are critical when working with epoxy resin and hardeners.
TotalBoat High Performance Epoxy Resin and TotalBoat High Performance Hardeners can be measured either by pouring or by using the calibrated TotalBoat 2:1 Epoxy Pumps (sold separately). If using the pump method for dispensing, USE ONLY TOTALBOAT 2:1 Epoxy Pumps. DO NOT substitute the pumps from any other epoxy system or the material will not cure properly.
NOTE: The procedure for dispensing TotalBoat High Performance Epoxy Resin and TotalBoat High Performance Hardener properly is always ONE full pump of resin to ONE full pump of hardener.
Group Size A
Group Size B
Group Size C
PERSONAL SAFETY: For your safety, please be sure to wear protective gloves and eye, face, and clothing protection when working with epoxy resin and hardeners. Also, be sure your work area has adequate ventilation, and that you wear a proper respirator.
February 24, 2020
I used this on my various resin craft projects. I made Bookmarks, trays, magnets, trinket boxes, keychains, a thick frame, and a comb. It works excellent on small and larger pieces. It has no odor and no bubbles!!! It is a thin consistency which is great for filling in tiny areas and having the alcohol inks flow well. The medium gave me about 30 minutes working time before it became tacky. Within 3 hours it was hard. I waited 10 hours to unmold and the pieces were rock hard, and crystal clear. I'm so happy with this product and would highly recommend for any craft project!
September 27, 2018
Using a combination of slow, medium and fast hardeners in 46 sportfish major repairs in various weather conditions outside. Great support from the JD crew. I have ordered again and again.
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