Discover the power of two-part epoxy adhesives. Unlock superior bonds with exceptional strength, versatility, and customizable properties for aerospace, automotive, construction, and more.

Two-part epoxy adhesives are the workhorses of industrial bonding, offering unparalleled strength and versatility for a wide range of applications. Unlike their one-part counterparts, two-part epoxies involve a chemical reaction between a resin and a hardener, resulting in a robust, durable bond. This blog will explore the benefits, applications, and selection criteria for two-part epoxy adhesives, empowering you to make informed decisions for your bonding projects.

What are Two-Part Epoxies?

Two-part epoxies consist of two separate components: a resin and a hardener. When combined in the correct ratio, these components undergo a chemical reaction, curing into a rigid, high-strength polymer. This curing process can occur at room temperature or be accelerated with heat, depending on the specific formulation.

Key Benefits of Two-Part Epoxies:

• Exceptional Strength: Provides superior tensile, shear, and impact strength.
• Versatility: Bonds a wide range of substrates, including metals, plastics, ceramics, and composites.
• Customizable Properties: Formulations can be tailored for specific applications, offering varying cure times, viscosities, and temperature resistances.
• Gap Filling: Suitable for bonding irregular surfaces and filling gaps.
• Chemical Resistance: Offers excellent resistance to chemicals, solvents, and moisture.
  

  Incure Epo-Weld™ Series Core Products
  Product	Description	Color (Part A/B)	Viscosity (cps) (Part A/B)	Hardness (Shore D)	Pot Life
  6400	High adhesion strength, grease, chemical, and solvent resistance. Bonds ceramics, glass, plastics, and metals. General adhesive for convenience and speed at room temperature.	Colorless / Light Yellow	12,000 – 17,000 / 12,000 – 17,000	D84	3 mins
  6401	Toughened epoxy with high peel and shear strength. High crack and fatigue resistance for vibration applications. Bonds ceramics, glass, plastics, and metals.	Milky White / Yellow	13,000 – 19,000 / 12,000 – 18,000	D82	30 mins
  6403	Bonds steel plate, tetron fiber, and aluminum frames. High adhesion, grease, chemical, and solvent resistance. Anti-static property for PC and ABS bonding.	Colorless / Light Brown	9,000 – 19,000 / 10,000 – 32,000	D80	30 mins
  6404	Low viscosity, structural bonding adhesive. Good handling, chemical resistance, and surface gloss. For metal bonding and joining electronic devices, ceramics, and plastics.	Clear / Brown	10,000 – 20,000 / 10,000 – 30,000	D78	15 mins
  6405	Low viscosity, structural bonding adhesive. Good handling, chemical resistance, and perfect surface gloss. For metal bonding and joining electronic devices, ceramics, and plastics.	Clear / Brown	10,000 – 20,000 / 25,000 – 45,000	D78	30 mins
  6407	High adhesion strength, grease, chemical, and solvent resistance. For steel plate, tetron fiber, and aluminum frames bonding. Anti-static property.	Grey / White	30,000 – 70,000 / 17,000 – 47,000	D80	5 mins
  6408	Toughened epoxy with high peel and shear strength. High crack and fatigue resistance for vibration applications. Bonds plastics, metals, glass, and ceramics.	Black / Yellow	29,000 – 34,000 / 14,000 – 24,000	D82	30 mins
  6409	Fast cure at low temperature and easy to operate. Well suited for structural substrates.	Black / Yellow	25,000 – 35,000 / 21,000 – 41,000	D85	30 mins
  6411	Low viscosity, good transparency, perfect surface gloss, and high adhesion strength. Fast cure at low temperature for metals, glasses, ceramics, and plastics bonding.	Colorless / Light Yellow	5,000 – 13,000 / 5,000 – 9,000	D83	30 mins
  6414	Fast cure at low temperature. Insulation, chemical resistance, and excellent electrical properties. For decorative arts, crafts, glass bonding, and repair.	White / Yellow	7,000 – 17,000 / 13,000 – 18,000	D80	15 mins
  6415	Good handling, thermal shock resistance, and low exotherm for encapsulation of components and modules. For electronic devices bonding, sealing, casting, and potting.	Black / Yellow	3,000 – 7,000 / 4,000 – 8,000	D70	30 mins
  6416	Good handling, low temperature cure, high toughness, insulation, and thermal shock resistance. For electronic devices bonding, sealing, casting, potting, and encapsulation.	Light Yellow / Black	11,000 – 11,100 / 37,100 – 38,000	D78	–
  6417	Low viscosity, good handling, chemical resistance, and perfect surface gloss. Tough, strong structural bonds with excellent shear, peel, and impact strength. For metal, composites, and plastics bonding. High crack and fatigue resistance for vibration applications.	Black / Yellow	17,000 – 29,000 / 16,000 – 36,000	D75	20 mins
  6420	High adhesion strength, grease, chemical, and solvent resistance. Good electrical insulation. Bonds glass, ceramics, plastics, and metals.	Grey to White / Grey to White	12,000 – 24,000 / 17,000 – 27,000	D87	10 mins
  6423	Toughened epoxy with excellent shear, peel, and impact strength. Good adhesion, thermal shock, chemical, and solvent resistance. Cures at room temperature and exhibits good electrical insulation. For metal, plastics, and ceramics bonding.	Milky White / Amber	21,000 – 40,000 / 13,000 – 20,000	D80	50 mins
  6424	High crack and fatigue resistance for vibration applications. Perfect surface gloss. General adhesive for plastics, metals, and construction materials at room temperature.	White / Yellow	30,000 – 60,000 / 20,000 – 36,000	D84	20 mins
  6427	For PC to silicon rubber bonding. Tough and flexible. Used for screen printing.	Light Yellow / Light Yellow	750 – 1,500 / <500	D79	30 mins
  6428	Durable and tough with high peel and shear strength. High crack and fatigue resistance for vibration applications. Bonds plastics, metals, glass, and ceramics.	Milky White / Yellow	22,000 – 34,000 / 47,000 – 72,000	D76	20-30 mins
  6429	High viscosity, high Tg 2-part epoxy for electronic device bonding. Elevated temperature post-cure for maximum high-temperature stability.	Light Grey / Brown	186,000 – 435,000 / 58,800 – 137,500	D90	30 mins
  6430	Good handling, perfect surface gloss, and extreme flexibility. For metal and device bonding (wood, ceramics, glass, rubber, plastics). High toughness, flexibility, and thermal shock resistance. Low exotherm and embedment stress. For electronic devices, stainless steel, and glass fiber sealing.	Beige / Grey	150,000 – 240,000 / 300,000 – 500,000	D75	30 mins
  6431	High performance epoxy with low stress and shrinkage. High elasticity and good handling. General adhesive for convenience and speed. Thermal shock resistance.	Black / Amber	300 – 500 / 600 – 1,000	A48	4-6 hrs
  6433	High toughness, durability, and outstanding flexibility. For dissimilar substrates with thermal stress. Suitable for low-stress potting.	Colorless / Light Yellow	7,300 / 13,500	D54	3-5 mins
  6434	Epoxy for electronic devices with high adhesion strength. Excellent fluidity, surface gloss, and adhesion. Fast curing at low temperature.	White / Dark Grey	40,000 – 60,000 / 58,000 – 90,000	D70	30 mins
  6446	High adhesion strength, grease, chemical, and solvent resistance. Bonds plastics, ceramics, glass, and metals. General adhesive for convenience and speed at room temperature.	Colorless / Light Yellow	16,000 – 24,000 / 12,000 – 17,000	D85	3 mins
  Package Size: 50ml cartridge

Applications of Two-Part Epoxies:

Two-part epoxies are employed across numerous industries, including:

• Aerospace: Bonding structural components and composite materials.
• Automotive: Bonding body panels, trim, and structural elements.
• Construction: Anchoring bolts, bonding concrete, and repairing structures.
• Electronics: Encapsulating and bonding electronic components.
• Marine: Repairing and bonding boat hulls and components.
• Manufacturing: General bonding and assembly of various products.

Choosing the Right Two-Part Epoxy:

Selecting the appropriate two-part epoxy is crucial for achieving optimal results. Consider the following factors:

• Substrate Materials: Ensure the epoxy is compatible with the materials you intend to bond.
• Cure Time: Choose an epoxy with a cure time that aligns with your production schedule.
• Viscosity: Select a viscosity that allows for proper application and gap filling.
• Bond Strength: Determine the required bond strength for your application.
• Temperature Resistance: Consider the operating temperature of the bonded assembly.
• Chemical Resistance: Select an epoxy that can withstand the expected chemical exposure.
• Mix Ratio: Follow the manufacturer’s recommended mix ratio for optimal performance.

Tips for Using Two-Part Epoxies:

• Surface Preparation: Thoroughly clean and prepare surfaces for optimal adhesion.
• Accurate Mixing: Measure and mix the resin and hardener according to the manufacturer’s instructions.
• Application: Apply the epoxy evenly and ensure proper coverage.
• Clamping: Clamp or hold the bonded parts together during the curing process.
• Safety: Wear appropriate personal protective equipment (PPE) and work in a well-ventilated area.

Conclusion:

Two-part epoxy adhesives provide exceptional bonding performance for a wide range of applications. By understanding their properties and selection criteria, you can choose the right epoxy to achieve strong, durable, and reliable bonds.