EPIBOND® 315 A/B

EPIBOND® 315 A/B Adhesive is an extrudable, two-component, room-temperature curing epoxy adhesive designed for service temperatures up to 400°F (204°C). This product is suitable for bonding a wide variety of materials, such as metals, composites, and many other dissimilar substrates. The combination of high shear strength and compression makes this adhesive well-suited for aerospace applications and composites requiring a liquid shim. EPIBOND® 315 A/B offers rapid strength build-up with an easy-to-process mix ratio.

RTU Product Type: 2K (2 component) Adhesive, Epoxy Adhesive, Structural Adhesive

Application Area: Aerospace Applications, Aircraft, Honeycomb Composites, Space Shuttle, Spacecraft

Compatible Substrates & Surfaces: Composites, Metal

Chemical Family: Epoxy & Epoxy Derivatives

Features: Ease Of Use, Excellent Aging Resistance, Fast Cure, Good Compressive Strength, Good Environmental Resistance, Heat Resistance, High Lap Shear Strength, High Service Temperature, Low Maintenance, Low Outgassing, Room Temperature Curing

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Identification & Functionality

Features & Benefits

Labeling Claims
Ready-to-Use Product Features
Features and Benefits
  • Ideal for bonding metals and composites
  • Room temperature cure
  • High lap shear and compressive strength
  • Maximum service temperature up to 400°F (204C)
  • Resistant to environmental degradation / aging
  • Contains 0.005" spacer beads
  • Convenient 2:1 volumetric mix ratio for cartridges or meter mix dispensing
  • Low Outgassing per NASA standard
  • No Substances of Very High Concern (SVHC) are intentionally added or intentionally present per REACH.

Applications & Uses

Application Area
Compatible Substrates & Surfaces
Markets
Applications
Application Information
  • EPIBOND® 315 A/B structural adhesive is not only versatile, it can improve production throughput by up to 80%.
  • Parts exposed to demanding conditions may require heat resistance and high compressive strength. And on the manufacturing floor, avoiding bottlenecks is key to maximizing productivity.
  • With a superior service temperature of 400°F/200°C, EPIBOND® 315 A/B adhesive provides reduced maintenance and increased part lifetime across a wide range of applications. Its high heat resistance and compressive strength enables its use as a liquid shim in areas where metal shims are currently used.
  • Curing EPIBOND® 315 A/B adhesive at room temperature is up to 88% quicker than competitive adhesives, with a 75% faster time to handling strength. Easy to use and fast to cure, parts can be made in one working shift.

What makes EPIBOND® 315 A/B structural adhesive different?

EPIBOND® 315 A/B adhesive is a two-component, room-temperature curing epoxy structural adhesive specifically designed for demanding applications requiring high heat resistance and compressive strength.
 

Property Value Unit Notes
T-Peel Strength 2.1 N/mm T-Peel at room temperature
Compression (250°F/121°C) 10,000 psi 128% improvement
Lap Shear Strength 1,100 psi

Designed for 400°F/204°C service

Service Temperature Limit 204 °C

Maximum operating temperature

Mix Ratio 2:1   Recommended mix ratio
Improved Productivity 80% %

Up to 80% improvement in throughput

Regulatory & Compliance

Quality Standards

Technical Details & Test Data

Cured Properties

Unless otherwise stated, the data were determined with typical production batches using standard test methods, and the specimens cured for 5 days at 77°F (25°C). These are typical values and should not be used to establish product specifications. 

Property

Value

Unit

Test Method

Condition

Tensile Lap Shear Strength (Aluminum 2024*, Cured 150°F (66°C) for 1-2 hours) 4,500 psi ASTM D1002 at -55°C
Tensile Lap Shear Strength (Aluminum 2024*, Cured 150°F (66°C) for 1-2 hours) 5,500 psi ASTM D1002 at 25°C
Tensile Lap Shear Strength (Aluminum 2024*, Cured 150°F (66°C) for 1-2 hours) 4,250 psi ASTM D1002 at 82°C
Tensile Lap Shear Strength (Aluminum 2024*, Cured 150°F (66°C) for 1-2 hours) 3,350 psi ASTM D1002 at 121°C
Tensile Lap Shear Strength (Aluminum 2024*, Cured 150°F (66°C) for 1-2 hours) 2,750 psi ASTM D1002 at 149°C
Tensile Lap Shear Strength (Aluminum 2024*, Cured 150°F (66°C) for 1-2 hours) 2,000 psi ASTM D1002 at 177°C
Tensile Lap Shear Strength (Aluminum 2024*, Cured 150°F (66°C) for 1-2 hours) 1,000 psi ASTM D1002 at 204°C
Tensile Lap Shear Strength (Aluminum 2024*) 900 psi ASTM D1002

Cured at 25°C/5h

Tensile Lap Shear Strength (Aluminum 2024*) 2,000 psi ASTM D1002

Cured at 25°C/7h

Tensile Lap Shear Strength (Aluminum 2024*) 5,000 psi ASTM D1002

Cured 77°F for 5 days

Tensile Lap Shear Strength (Aluminum 2024*) 4,500 psi ASTM D1002

Carbon Fiber Composite, blasted 200 grit

Tensile Lap Shear Strength (Aluminum 2024*) 4,000 psi ASTM D1002 Steel, Blasted
Compressive 30,000 psi ASTM D695

at -55°C, Ultimate Strength

Compressive 35,000 psi ASTM D695

at 25°C, Ultimate Strength

Compressive 25,000 psi ASTM D695

at 121°C, Ultimate Strength

Compressive 20,000 psi ASTM D695

at 177°C, Ultimate Strength

Compressive 12,000 psi ASTM D695

at 25°C, 2% Offset Yield

Compressive 14,000 psi ASTM D695

at 177°C, 2% Offset Yield

Compressive 650,000 psi ASTM D695

at 25°C, Modulus

Hardness 85 shore D ASTM D2240 at 25°C
Cured Density 1.35 g/cm³   at 25°C
Thermal Analysis 125 °C DMA E onset

Cured 2 hours at 66°C, Tg

Thermal Analysis TBD °C DMA E onset

Cured 1 hour at 93°C, Tg

Thermal Analysis TBD °C DMA E onset

Cured 1 hour at 121°C, Tg

Thermal Analysis 127.3 x10⁻⁶ mm/mm/°C  

Cured 1 hour at 121°C, CTE Above Tg

Thermal Analysis 67.5 x10⁻⁶ mm/mm/°C  

Cured 1 hour at 93°C, CTE Below Tg

Lap Shear Strength (Aluminum, Anodized and Primed) 5,000 psi ASTM D1002

30 days in water at 25°C

Lap Shear Strength (Aluminum, Anodized and Primed) 5,000 psi ASTM D1002

7 days in Hydraulic Fluid at 49°C

Lap Shear Strength (Aluminum, Anodized and Primed) 5,000 psi ASTM D1002

7 days in Lubrication Oil at 49°C

Lap Shear Strength (Aluminum, Anodized and Primed) 5,200 psi ASTM D1002

7 days in Jet A at 25°C

Tg TBD °C DMA E onset

After 7 days at 71°C, 85% RH

Outgassing 0.65% % ASTM E595

TML, Cured 7 days at 25°C

Outgassing 0.02% % ASTM E595

CVCM, Cured 7 days at 25°C

* - Aluminum 2024 T3 Clad, Anodized and Primed 

Processing Guidelines
  • Substrates should be properly surface treated and be free from any contaminants.
  • Mix both components thoroughly for several minutes until a homogeneous mixture is obtained.
  • Mixing with a centrifugal mixer such as a FlackTek, Hauschild, or Thinky mixer can improve results. Total mixing time at 2000 rpm should be kept below 1 minute to avoid excessive heating.
  • Dispensing from a 2:1 dual barrel cartridge through a static mixer is the preferred method.
  • The mixed adhesive should be applied to both dry joint surfaces with a spatula.
  • A layer of adhesive 0.004 to 0.012 inches (0.1 to 0.3 mm) thick will normally provide the maximum lap shear strength. However, this adhesive has been specifically designed to be effective in layers of up to 0.12 in. (3 mm).
  • The components to be bonded should be assembled and clamped as soon as the adhesive has been applied. Even contact pressure throughout the joint area during cure will ensure optimum performance.
Technical Information

Lap Shear Strength versus Temperature

EPIBOND® 315 A/B - Cured Properties - 1

Compressive Strength versus Temperature

EPIBOND® 315 A/B - Graph Details - 1

Processing Information
Parameter Value
Mix ratios

100:61.5 Per Weight

Mixing color indicator Resin (A): Off-White Hardener (B): Dark Gray Mixed: Gray
Viscosity at 1/s shear rate, cP A: 650,000 B: 165,000 Mixed: 300,000
Sag/Slump Test [ASTM D2202] No Sag
Static Mixer / Extrusion rate at 80psi

0.50in diameter, 24 element … 75 g/min

Static Mixer / Extrusion rate at 80psi

0.44in x0.44in width, 26 element … 80 g/min

Recommended Cure Schedules

5 days at 77°F (25℃)

77°F/ 2-3 hours + 150°F (66C) / 1-2 hours

77°F/ 2 hours + 200°F (93C) / 45-60 minutes

77°F/ 3 hours + 250°F (121C) / 30-45 minutes

77°F/ 3 hours + 300°F (149C) / 20-30 minutes

Working time (within nozzle)

60 min within nozzle, 30 min for 100g mass

Gel time at 77°F (25℃)

20g / 90 min; 50g / 75 min; 100g / 45 min

Lap Shear Strength vs Time Graph

Strength Development at Room Temperature. Anodized & Primed Aluminum


EPIBOND® 315 A/B - Processing Information - 1

Packaging & Availability

Regional Availability
  • Americas

Storage & Handling

Storage Conditions
  • EPIBOND® 315 A Resin and EPIBOND® 315 B Hardener should be stored in a dry place in their original sealed containers.
  • When stored at a temperature between 2°C and 25°C (36°F and 77°F) the shelf life is 24 months from date of manufacture.
  • When stored at a temperature between 18°C and 40°C (64°F and 104°F), the shelf life of both components is 12 months from date of manufacture.
  • Tightly re-seal all containers immediately after use to prevent contamination.