Epoxy hardener Manufacturer

  • Matching famous hardeners with quality delivery plus formula and tech support.
  • In-house R&D lab since 2004 with 50 engineers, offering custom formulas and tech support.
  • Three plants, 60,000 square meters of production area, serving 200+ firms in 30+ countries.
  • Factory-direct, economies of scale, 26,000-ton capacity, 30+ years of industry experience.
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Popular Equivalent Products

Common FEC epoxy hardener grades for equivalent product replacement evaluation.

FEC-1361 → Ancamine 2726 FEC-2257 → Cardolite NC 541 FEC-5110 → ANCAMINE 2432 FEC-5356 → ANCAMINE 2849 FEC-2140 → Ancamide 3200 FEC-1422 → DEH-487
FEC-1270 → Cardlite NC-558

Epoxy Hardener Selection by Application

Epoxy Hardeners for Adhesive Applications

Model Generic Type Appearance Viscosity
(mPa.s, 25°C)		 Amine Value
(mgKOH/g)		 Loading
(PHR)		 Gel Time
(min, 25°C)		 Applications Suggested Features and Benefits
FEA-4101 Cycloaliphatic Nearly colorless transparent liquid 10000-20000 280±30 100 25-30 Electronic bonding and fixing Excellent weather resistance, anti-yellowing, outstanding anti-corrosion, shear strength on steel ≥10MPa
FEA-4102 Cycloaliphatic Nearly colorless transparent liquid 10000-20000 270±30 100 30-35 Electronic bonding and fixing Excellent weather resistance, anti-yellowing, outstanding anti-corrosion, shear strength on steel ≥10MPa
FEA-4103 Cycloaliphatic Nearly colorless transparent liquid 5000-10000 270±30 100 60 Electronic bonding and fixing Excellent weather resistance, anti-yellowing, outstanding anti-corrosion, shear strength on steel ≥10MPa
FEA-4104 Cycloaliphatic Nearly colorless transparent liquid 5000-10000 270±30 100 120 Electronic bonding and fixing Excellent weather resistance, anti-yellowing, outstanding anti-corrosion, shear strength on steel ≥10MPa
FEA-4105 Cycloaliphatic Nearly colorless transparent liquid 5000-10000 270±30 100 240 Electronic bonding and fixing Excellent weather resistance, anti-yellowing, outstanding anti-corrosion, shear strength on steel ≥10MPa
FEA-4130 Cycloaliphatic Nearly colorless transparent liquid 1000-2000 295±30 50 20 Ship repair and bonding Fast curing, anti-yellowing
FEA-4230 Polyamide Reddish-brown transparent liquid 5000-15000 230±30 100 60-180 Ship repair and bonding Flexible, high bonding strength, tensile ≥20MPa on steel, elongation ≥20%
FEA-4231 Polyamide Reddish-brown transparent liquid 50000±30000 210±30 100 60-120 Anti-corrosion and bonding Good flexibility, high adhesion
FEA-4270 Polyamide Yellow transparent liquid 5000-10000 230±30 100 60-180 potlife Flexible bonding Good flexibility. To aluminum: ≥5MPa, to steel: ≥12MPa, elongation ≥150%
FEA-4271 Polyamide Yellow transparent liquid 5000-10000 230±30 100 60-180 potlife Screw fixing Flexible, good vibration resistance, tensile on aluminum ≥7MPa, on 304L steel ≥12MPa, elongation ≥10%
FEA-4273 Polyamide Yellow transparent liquid 3000-8000 230±30 100 60-120 Notch and joint filling and repair High bonding strength, tensile on steel ≥20MPa, elongation ≥20%

Need help choosing a suitable epoxy hardener? Send your application, resin type, curing speed requirement, and bonding substrate to our technical team.

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Epoxy Hardeners for Industrial Anti-Corrosion Applications

Model Generic Type Appearance Viscosity
(mPa.s, 25°C)		 Amine Value
(mgKOH/g)		 Loading
(PHR)		 Gel Time
(min, 25°C)		 Applications Suggested Features and Benefits
FEC-2140 Polyamide Yellow transparent liquid 1000-4000 300±30 60 60-90 Primer for anti-corrosion, Sealing for flooring Good adhesion, flexible
FEC-2257 Cardanol-based polyamine Reddish-brown transparent liquid 5000-10000 260±30 80-100 60-180 Primer for flooring, Primer for anti-corrosion Excellent adhesion, damp substrates applicable, very good anti-chemicals
FEC-2258 Cardanol-based phenalkamine Reddish-brown transparent liquid 10000-30000 315±30 65-75 60-180 Primer for anti-corrosion and flooring Excellent adhesion, damp substrates applicable, very good anti-chemicals
FEC-3280 Cardanol-based phenalkamine Reddish-brown transparent liquid 5000-15000 230±30 100 60-180 Primer and midcoat Very good anti-corrosion, damp substrates applicable
FEC-3282 Cardanol-modified polyamide Reddish-brown transparent liquid 1000-2000 230±30 100 120-240 Primer and midcoat Long potlife, combined the advantages of cardanol and polyamide, excellent comprehensive performance
FEC-5110 Modified cycloaliphatic Yellow transparent liquid 200-400 350-380 46 25-30 Secondary containment linings and mortars Fast curing, outstanding chemical resistance
FEC-5121 Modified cycloaliphatic Light yellow transparent liquid 500-1500 290±30 50 20 Anti-corrosion for pipes and floor Good anti-corrosion, anti-yellowing, fast curing
FEC-5150 Phenalkamine Light yellow transparent liquid 2000-5000 370±30 40 8-15 Heavy-duty anti-corrosion, Underwater and damp substrate Very good anti-corrosion, fast curing, under water temperature curable, good early water resistance
FEC-5151 Phenalkamine Light yellow transparent liquid 2000-5000 370±30 40 8-15 Anti-corrosion for metal and floor High cost effectiveness, fast curing at ambient and low temperature, good anti-corrosion
FEC-5152 Aromatic modified Yellow transparent liquid 50-200 260±30* 50 60-180 Anti-corrosion for floor Good acid and alkali resistance, very low viscosity
FEC-5356 Aromatic polyamine Amber liquid 3500-5000 370-440 45 35-45 Tank and chimney linings, secondary containment Excellent resistance to sulfuric acid, crude oil, good blush resistance
FEC-7521 Cycloaliphatic Nearly colorless transparent liquid 10000-20000 310±30 100 15-25 Zipper coating Transparent and non-yellowing, boiling water resistance, high adhesion

All products are free of APEO and NP. Phenalkamines may contain trace amounts of formaldehyde. * Perchloric acid method.

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Epoxy Hardeners for Floor & Concrete Applications

Model Generic Type Appearance Viscosity
(mPa.s, 25°C)		 Amine Value
(mgKOH/g)		 Loading
(PHR)		 Gel Time
(min, 25°C)		 Applications Suggested Features and Benefits
FEC-1051 Modified cycloaliphatic Yellow transparent liquid 1000±5000 240±30 80 5 Rapid repair and joint filling for concrete, water-resistant material Very fast curing, cost-effective
FEC-1151 Phenalkamine Yellow transparent liquid 500-1000 300±30 50 8-15 Primer and midcoat Fast curing at low temperature, sanding feasible within 4hrs
FEC-1170 Cardanol-based phenalkamine Yellow transparent liquid 300-1000 260±30 80-100 60-180 Primer and midcoat Good heat resistance, excellent water resistance
FEC-1172 Cardanol-based phenalkamine Yellow transparent liquid 80-200 300±30 50 30-50 Primer and midcoat Excellent comprehensive performance, very low viscosity
FEC-1270 Cardanol-based phenalkamine Amber liquid 500-1500 330±30 50 40 Primer and midcoat in humid environment No amine blush, no whitening, no water spots, excellent adhesion on damp substrates
FEC-1323 Cycloaliphatic Nearly colorless transparent liquid 300±100 300±30 50 60-120 All-in-one flooring Good weather resistance
FEC-1330K Polyether amine Colorless to light yellow transparent liquid 100-300 290±30 50 15-30 Topcoat Fast curing, cost-effective, low viscosity
FEC-1361 Modified amine Light yellow transparent liquid 200-500 290±30 50 15-30 Topcoat Fast curing, good anti-corrosion, low viscosity, high gloss
FEC-1422 Modified cycloaliphatic Light yellow transparent liquid 150-300 300±30 50 40-60 Topcoat Low viscosity, anti-yellowing, good early water resistance
FEC-1522 Cycloaliphatic Nearly colorless transparent liquid 200-400 300±30 50 30-60 Topcoat Low viscosity, anti-yellowing, high hardness
FEC-1530 Polyether amine Colorless to light yellow transparent liquid 70-200 290±30 50 50 Self-leveling flooring High cost effectiveness, very low viscosity
FEC-1720 Modified cycloaliphatic Nearly colorless transparent liquid 1000±5000 300±30 50 20-40 Terrazzo floor Fast curing, high hardness, excellent sandability, good anti-yellowing
FEC-1722 Modified cycloaliphatic Nearly colorless transparent liquid 200-500 300±30 50 60 Flakes / chips floor Good flexibility, anti-yellowing
FEC-1730 Modified cycloaliphatic Nearly colorless transparent liquid 10-100 500±30 28 120-240 Color sand floor, Floating sand floor Anti-yellowing, long potlife, very low viscosity
FEC-2140 Polyamide Yellow transparent liquid 1000-4000 300±30 60 60-90 Primer and sealing for flooring, Primer for anti-corrosion Good adhesion, flexible
FEC-2257 Cardanol-based phenalkamine Reddish-brown transparent liquid 5000-10000 260±30 80-100 60-180 Primer for flooring, Primer for anti-corrosion Excellent adhesion, damp substrates applicable, very good anti-chemicals
FEC-2258 Cardanol-based phenalkamine Reddish-brown transparent liquid 10000-30000 315±30 65-75 60-180 Primer for flooring, Primer for anti-corrosion Excellent adhesion, damp substrates applicable, very good anti-chemicals

Need help choosing a suitable epoxy hardener? Send your application, resin type, curing speed requirement, and substrate condition to our technical team.

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Epoxy Hardeners for Electronic Potting Applications

Model Generic Type Appearance Viscosity
(mPa.s, 25°C)		 Amine Value
(mgKOH/g)		 Loading
(PHR)		 Gel Time
(min, 25°C)		 Applications Features and Benefits
FEP-101 Aromatic polyamine Reddish brown to reddish maroon liquid 100-300 260±30 50 20-60 Battery case cover adhesive, electronic potting High cost-effectiveness
FEP-102 Polyether amine Colorless to light yellow transparent liquid 100-200 290±30 50 40-60 Electronic potting Low odor, light color, low shrink, long potlife, good hardness and toughness
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Epoxy Hardeners for Dispensing, DIY Crystal Epoxy Applications

Model Generic Type Appearance Viscosity
(mPa.s, 25°C)		 Amine Value
(mgKOH/g)		 Loading
(PHR)		 Gel Time
(min, 25°C)		 Applications Features and Benefits
FEP-201 Polyether amine Colorless to light yellow transparent liquid 0-100 460±20 33 50-90 Epoxy dispensing, photovoltaic panel adhesive, stone coating adhesive Good hardness, high transparency
FEP-202 Cycloaliphatic Nearly colorless transparent liquid 200-400 300±30 50 30-60 Jewelry adhesive Good hardness, anti-yellowing
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Specialty Epoxy Curing Agents & Additives

FEM-SP2

Chemical name: Styrenated phenol
CAS No.: 61788-44-1
Appearance: Light yellow to amber viscous liquid
Chemical formula: C₆H₃(OH)-(C₈H₉)₂

Usage & benefits:

  • Used as diluent and multifunctional modifier.
  • Imparts flexibility and blush resistance.
  • Significantly enhances toughness, impact resistance and abrasion resistance.
  • Improves UV resistance, provides long-time color stability.
  • No adverse effects on the heat resistance and mechanical properties of cured materials.
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Mercaptans

Polymercaptans are thiol-based curing agents for epoxy resins, featuring ultra-fast curing at room temperature, excellent low-temperature curability below 0°C–20°C. Widely used for epoxy emergency repair materials, low-temperature adhesives and quick-setting sealants, with good fluidity and construction performance, suitable for outdoor low-temperature construction and emergency rush repair working conditions.

Appearance & Features

  • Colorless clear liquid with a mild characteristic odor.
  • Very fast-curing, even at low temperature.
  • Outstanding toughness.

Applications

  • Electronic adhesives.
  • Sintered stone and ceramics bonding & quick repair.
  • Plastic and steel bonding material.
Model Viscosity (mPa·s, 25°C) Loading (PHR) Gel Time (min, 25°C) Features and Benefits
FEA-6000 8000~12000 100 1~3 Anti-yellowing, high bonding strength, cost-effective
FEA-6001 5000~10000 100 1~3 High cost-effectiveness, shear ≥12MPa
FEA-6110 7000~10000 100 2~4 No softening in water, anti-yellowing
FEA-6112 3000~5000 50 4~7 Excellent sandability, hardness ≥75D at 80°C, No softening in water, anti-yellowing
FEA-6132 10000~15000 100 2~4 Very good anti-yellowing
FEA-6133 8000~15000 100 3~5 Flexible, hardness 40°–50D, Shear ≥25MPa, High bonding strength, anti-falling
FEA-6310 5000~7000 100 10~15 Long potlife, fast post-curing, sandable in 20min, anti-yellowing
FEA-6320 9000~14000 100 12~17 Long potlife, anti-yellowing
FEA-6321 9000~14000 100 25~30 Long potlife, anti-yellowing
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Diluents, Accelerators

Product Generic Type Appearance Usage & Benefits
FED-PC Propylene carbonate Colorless transparent liquid • Low viscosity, high boiling point, low toxicity and high solvency.
• React with curing agents to participate in cross-linking and accelerate curing.
• Inhibit surface oiliness and blushing.
FED-AGE C12-14 Alkyl glycidyl ether Colorless transparent liquid • Low viscosity, non-volatile, low-toxic and odorless.
• Low surface tension and good permeability.
• Can improve the flexibility of coatings.
FED-692 Benzyl glycidyl ether Colorless transparent liquid • High boiling point, low toxicity.
• Rigid structure, excellent heat resistance.
• Balancing hardness and flexibility.
FED-BZ Benzyl alcohol Colorless transparent liquid • Widely used diluents for epoxy resin and hardener.
• Accelerate the curing of epoxy resin and amine.
• Inhibit surface oiliness and blushing.
FED-CNSL Cashew nut shell oil Dark red to deep brown liquid • Recommended for use as a diluent in epoxy asphalt paint to lower costs.
FED-CDN Cardanol Light yellow to yellowish brown liquid • Recommended for use as a diluent and accelerator.
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Anhydride, Dicyandiamide

Product Generic Type Appearance Usage & Benefits
FEM-MTHPA Methyl tetrahydrophthalic anhydride Colorless to light yellow transparent liquid Widely used as alicyclic anhydride curing agent for epoxy resins.
Low viscosity, light color, low volatility and excellent thermal stability.
Cured products have high heat resistance, good toughness and outstanding electrical insulation properties.
Loading level: 80%~85% of total resin (E51).
FEM-MHHPA Methyl tetrahydrophthalic anhydride Colorless to light yellow transparent liquid Widely used as alicyclic anhydride curing agent for epoxy resins.
Low viscosity, light color, low volatility and excellent thermal stability.
Cured products have high heat resistance, good toughness and outstanding electrical insulation properties.
Loading level: 80%~85% of total resin (E51).
FEM-DICY Dicyandiamide White crystalline powder – Excellent latency at room temperature.
– Low hygroscopicity, long pot life for one-component epoxy system.
– Used in adhesive to improve the heat-resistance (Loading level: 2~3%).

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Catalysts

Product Generic Type Appearance Usage & Benefits
FEM-K54 Tertiary amine Yellowish to amber liquid • 2,4,6-Tri (dimethylaminomethyl) phenol
• Act as epoxy homopolymerization catalysts
• Suitable for epoxy resins cured with a wide variety of hardener types
• Application in adhesives and high performance composites
FEM-T18 Modified amine Colorless to light yellow transparent viscous liquid • Modified amine, low odor, light color, and resistance to yellowing
• Can be used with a wide variety of hardener types, especially suitable for polyether and aliphatic amine, also for polyamide and mercaptan
• Use level: 1~3% of hardener, showing better promoting effect than FEM-K54
FEM-T49 Modified amine Colorless to light yellow transparent viscous liquid • Similar to FEM-T18 – Better color and smell than FEM-T18
• Better stability at low temperature than FEM-T18
• Can be used at low temperature about -10°C
FEM-K50 Modified amine Colorless to light yellow transparent viscous liquid • Specially modified Lewis Base, low odor, light color, and resistance to yellowing
• Suitable for polyether and aliphatic amine, also for polyamide and mercaptan
• Use level: 3~5% of hardener
FEM-EMZ 2-Ethyl-4-methyl-imidazole Yellowish viscous liquid • Used with anhydrides, dicyandiamide to lower the curing temperature and to improve the deformation resistance of epoxy at high temperature, and chemical-resistance
• Use level: 2~7% of amine hardener
FEM-SA Salicylic acid White crystalline powder • Widely used as accelerator compatible with epoxy resin and amine curing agents, especially for aromatic amine like DDM
• Use level: 0.5~2% of amine hardener
FEM-TU Thiourea White crystalline powder • Widely used as accelerator compatible with polyether & aliphatic amine
• 2~3 times catalytic efficiency of FEM-SA
• Use level: 0.2~0.5% of amine hardener
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Feiyang Protech has an in-house R&D lab since 2004 with 40 engineers, providing custom formulas and technical support. The company operates three plants with 60,000 square meters of production area, serving over 200 firms in more than 30 countries. It offers factory-direct supply with economies of scale, a 26,000-ton capacity, and over 30 years of industry experience. Feiyang Protech also holds 84 invention patents, 17 industry standards, and ECOVADIS Silver certification.

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