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Product Details

TotalBoat High Performance Slow Hardener is the curing agent for low-viscosity TotalBoat High Performance Epoxy Resin when you need to extend pot life and cure time, or when you are working in warmer temperatures.

At 77°F, this non-blushing hardener has a pot life of 40 minutes, will be tack-free in approximately 5 hours, and reaches full cure in 5 days.

Pairing TotalBoat High Performance Resin with the Slow Hardener creates 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 Slow 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: Slow hardener is also available in a 26.1 gallon container, for use with drums of High Performance Resin. Please contact us for pricing.

Tech Specs
Properties (Admixed) High Performance Fast Hardener High Performance Medium Hardener High Performance Slow Hardener
Color Clear Clear Clear
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
Tensile Elongation 7.5% 7.0% 6.7%
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 HardenerHigh Performance Medium HardenerHigh 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
Info & Guides
TotalBoat High Performance Epoxy Resin and High Performance Non-Blushing Hardener combine to cure to an ultra-clear, glossy, blush-free finish that produces exceptional results for hand layups, laminating, and clear coating.

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?

  • High Performance Fast Hardener - Use High Performance Fast Hardener for the fastest cure and shortest working time at room temperature, or for an overnight cure in low temperatures (minimum 55°F).
  • High Performance Medium Hardener - Use High Performance Medium Hardener for most common applications, or for an overnight cure at room temperature (77°F).
  • High Performance Slow Hardener - Use High Performance Slow Hardener for extended working time and cure time at room temperature, or when working in warmer temperature conditions. If you are new at working with epoxy resin, the slow speed hardener will give you more working time, which you may find helpful.

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.

Technical Information

Group Size A

  • TB-0221SA - TotalBoat High Performance Slow Hardener - 1 Pint
  • TB-0221RA - TotalBoat High Performance Epoxy Resin - 1 Quart (sold separately)

Group Size B

  • TB-0221SB - TotalBoat High Performance Slow Hardener - 1/2 Gallon
  • TB-0221RB - TotalBoat High Performance Epoxy Resin - 1 Gallon (sold separately)

Group Size C

  • TB-0221SC - TotalBoat High Performance Slow Hardener - 1 Gallon (2 are needed for 4 gallons of resin)
  • TB-0221RC - TotalBoat High PerformanceEpoxy Resin - 4 Gallons (sold separately)

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.

Reviews for TotalBoat High Performance Slow Hardener

4 of 4 Reviews

May 30, 2021

Epoxy table
By Rhizzo from Dilworth mn

Verified Purchase

It takes an extremely long time to cure...I wouldn't touch it with a rag, cloth rag ect...for at least 2 weeks. Worth the wait, beautiful product...order mixing tubs, trust me :)

This was a solid wood slab. All total boat product:)
Bottom Line Yes, I would recommend to a friend

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April 23, 2021

Paul Hyde has been great to work with.
By Chagrin Valley from Warrensville Heights, Ohio

Verified Purchase

The product is fine. Paul has done a great job of helping us with various purchases.

Bottom Line Yes, I would recommend to a friend

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March 19, 2021

The only resin I use
By A Familiar from San Diego, Ca

Verified Purchase

I wish I could be a brand ambassador because this is the only resin I stand for. I've tried 2 other brands and nothing compares !

Bottom Line Yes, I would recommend to a friend

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August 24, 2020

No Bubbles
By Greg from Danville CA

Verified Purchase

As a woodworker making a table I needed a way create a narrow dark feature strip between two different woods along a complex curve 24 feet long. The curves were too tight for bent wood. I tested other epoxies but bubbles destroyed the effect. Total Boat High Performance dyed to the right color solved it. Not a single bubble in the entire pour! Great product.

Bottom Line Yes, I would recommend to a friend

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