Henkel STYCAST-2651-W1/CAT27-1 (1-kg-Kit)

LOCTITE STYCAST 2651 Epoxy Encapsulant

Overview

LOCTITE STYCAST 2651 is a black, dielectric-grade epoxy encapsulation resin designed for general-purpose electrical and electronic protection applications. The material provides excellent adhesion to a wide variety of substrates and can be paired with multiple catalyst systems to achieve different curing profiles and performance characteristics. It is widely used for potting, encapsulation, insulation, and protection of electronic assemblies, transformers, sensors, coils, and aerospace electrical components.

Key Technical Specs

• Product Type: Epoxy encapsulation resin
• Technology: Filled epoxy system
• Appearance: Black resin
• Application: Encapsulation and potting
• Viscosity (Resin): 225,000 cP at 25°C
• Density: 1.65 g/cm�
• Shelf Life: 274 days at 25°C
• Flash Point: Refer to SDS
• Electrical Grade: Dielectric insulating compound

Approvals & Specifications

• Manufactured by Henkel under the LOCTITE STYCAST product line
• Designed for dielectric encapsulation applications
• Suitable for aerospace, electronics, industrial, and defense applications
• NASA outgassing data available for selected catalyst systems
• Technical Data Sheet Reference: August 2019

Typical Applications

• Electronic component encapsulation
• Transformer and coil protection
• Sensor potting and environmental sealing
• Circuit board encapsulation
• Aerospace electrical assemblies
• Industrial control systems
• High-reliability electrical insulation applications

Compatibility & Safety Notes

• Components should be thoroughly cleaned before encapsulation to ensure proper adhesion and electrical reliability
• Power mixing is recommended to achieve homogeneous filler distribution
• Vacuum degassing is strongly recommended to eliminate entrapped air
• Avoid excessive mixing speeds that may introduce air or reduce working life
• Follow catalyst-specific mixing ratios precisely
• Consult the Safety Data Sheet (SDS) before handling
• Use appropriate PPE during mixing and application

Packaging & Procurement

• Available through Henkel Electronics Materials distribution channels
• Compatible with multiple catalyst systems including CAT 9, CAT 11, and CAT 23LV
• Store unopened containers in a dry environment at approximately 25°C
• Do not return contaminated material to original containers

Why This Product is Chosen for AOG / MRO

• Excellent adhesion to a wide range of substrates
• Reliable electrical insulation performance
• Multiple catalyst options allow tailoring of cure speed and operating temperature
• Strong mechanical properties after cure
• Suitable for harsh environmental conditions
• Provides long-term protection against moisture and contaminants
• Widely recognized and trusted within aerospace and electronics industries

Practical Suggestions for Your Team (AOG Mindset)

• Select CAT 9 when rapid room-temperature curing is required
• Use CAT 11 for higher operating temperature requirements up to +155°C
• Choose CAT 23LV when lower viscosity and superior flow characteristics are needed
• Always vacuum degas before pouring into critical assemblies
• Warm assemblies gently to improve resin flow into tight cavities and complex geometries
• Perform post-curing at the highest expected service temperature for optimum performance
• Verify pot life before mixing large batches to minimize material waste during field repairs

Manufacturer / Aviation Spec Codes

• Product Name: LOCTITE STYCAST 2651
• Manufacturer: Henkel
• Product Family: STYCAST Electronic Encapsulation Systems
• Technology: Epoxy Encapsulant
• Primary Application: Electrical and Electronic Encapsulation
• Compatible Catalysts: LOCTITE CAT 9, CAT 11, CAT 23LV
• Operating Temperature Range:
  • CAT 9: -40°C to +130°C
  • CAT 11: -55°C to +155°C
  • CAT 23LV: -65°C to +105°C