Hardeners

Backed by decades of formulation expertise, Rhino Epoxy offers more than 70 custom resin and hardener systems engineered for civil engineering, CIPP, carbon fiber, and specialty applications. From large-scale projects requiring bulk deliveries to smaller operations needing pail quantities, we provide high-performance epoxy solutions with dependable quality and cost-effective results.

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Popular Hardeners

The following list represents our best selling hardeners, which must be paired with resins. Hardener viscosity is published mixed. Weight per gallon is for each individual component. Mix ratios are by weight unless otherwise noted. Systems are 100% solids, zero VOCs. If you do not see what you need, please contact us about custom formulations.

Product	Description	Viscosity	Mix Ratio	Work Life (minutes)	Lbs. / Gal
EC-21	Non-Corrosive 2:1 Press Molding Hardener	1,200	100:42	40	8:20
3100	Long Pot Life for Civil Engineering	250	100:50	130	7.90
3101	General Purpose Non-Corrosive Hardener	750	100:35	55	8.10
3102	Fast 4:1 Laminating and Tooling Hardener	1,500	100:22	12	9.00
3103R1	High Strength Non-Corrosive 4:1 Hardener	150	100:22	30	8.40
3105	Medium Viscosity 4:1 Tooling Hardener	1,200	100:22	30	8.60
3109	General Purpose 4:1 Non-Corrosive Hardener	600	100:22	30	8.50
3110	Fast 2:1 Hardener for Crack Injection/Construction	300	100:43	8	8.00
3120	General Purpose 2:1 Civil Engineering Hardener	100	100:43	25	8.00
3122D	1:1 “Decoupage” Coating Hardener	550	1:1 (vol)	30	8.20
3122D Gel	Gel Version of 3122D for Vertical Applications	Gel	1:1 (vol)	30	8.20
3136R1	High Strength Epoxy Hardener	60	100:20	30	8.20
3138R3	General Purpose High Temp Laminating & Tooling	175	100:22	65	8.20
3140	Variable Ratio Long Work Life Adhesive Hardener	11,000	100:45	240	8.10
3141	Fast Cure 4:1 Press Molding Hardener	150	100:22	12	8.20
3143	2:1 Chemical Resistant Hardener for Coatings	600	100:45	25	8.80
3145	General Purpose 1:1 Hardener for Patch & Repair	1,400	1:1 (vol)	13	8.10
3154	4:1 Medium Pot Life Low Viscosity Hardener	55	100:22	65	8.10
3155	4:1 Long Pot Life Low Viscosity Hardener	25	100:22	125	7.90
3156	Slow Version of 3102 Hardener	1,300	100:22	30	8.60
3163	2:1 Cycloaliphatic Hardener for Clear Coatings	75	100:43	40	8.00
3176	Non-Corrosive 4:1 Press Molding Hardener	300	100:22	25	8.80
3179	4:1 Non-Corrosive Hardener for Large Parts	275	100:22	50	8.20
3179SR1	Long Pot Life Version of 3179 Hardener	60	100:22	130	8.00
3180	Rubber Modified 1:1 Medium Modulus Hardener	4,500	1:1 (vol)	30	8.10
3181	Non-Corrosive 3:1 Laminating & Tooling Hardener	450	100:29	30	8.30
3182	1:1 High Strength & Impact Resistant Hardener	10,500	1:1 (vol)	30	8.10

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