3M SA9820 (50-ml-Kit)

3M™ Structural Adhesive SA 9820 Two-Part Crash Resistant Epoxy Adhesive

Overview

3M™ Structural Adhesive SA 9820 is a high-performance, two-component epoxy structural adhesive engineered for bonding aluminium and composite materials in demanding automotive and aerospace applications. Originally developed for body-in-white structural assembly, it provides exceptional crash resistance, high bond strength and excellent durability under heat, humidity and salt exposure. With broad process tolerances, compatibility with lubricated substrates and room-temperature strength build-up, SA 9820 is well suited to structural bonding applications requiring robust long-term performance.

Key Technical Specs

• Product Type: Two-component structural epoxy adhesive
• Product Name: 3M™ Structural Adhesive SA 9820 (B/A)
• Former Product Name: ANPE 941
• Technology: Epoxy
• Colour (Mixed): Orange
• Mix Ratio: 4 : 1 by weight or volume (Part B : Part A)
• Solids Content: 100%
• Density: 1.07 g/cm�
• Open Time: Approximately 60 minutes at room temperature
• Nozzle Life: Approximately 30 minutes
• Viscosity: Part A - 70 Pa�s; Part B - 260 Pa�s

Approvals & Specifications

• Performance testing to DIN EN 1465 (Overlap Shear)
• Performance testing to DIN EN 1464 (T-Peel)
• Developed for structural aluminium and composite bonding
• Suitable for OEM and Tier-1 structural assembly processes

Performance Highlights

• Excellent crash resistance and structural bond strength
• Outstanding adhesion to aluminium and composite substrates
• Compatible with many dry lubricants and processing oils
• Excellent long-term durability against heat, humidity and saltwater exposure
• Broad mix ratio, adhesive gap and cure tolerance
• Room-temperature strength development prior to heat cure
• Low-temperature induction activation reduces panel distortion
• 100% solids formulation with very low emissions and odour

Typical Applications

• Structural aluminium bonding
• Composite structural bonding
• Aerospace structural assemblies
• Automotive body-in-white (BIW) construction
• Tier-1 modular assembly manufacturing
• Metal-to-composite structural joints

Compatibility & Safety Notes

• Compatible with many dry lubricants and metal processing oils
• Suitable for aluminium and composite substrates
• Can be dispensed using commercially available two-component dispensing equipment
• Observe handling precautions outlined in the Safety Data Sheet (SDS)
• Store between 10°C and 30°C for optimum shelf life and dispensing performance

Application & Curing

• Mix Ratio: 4 parts Part B to 1 part Part A by weight or volume
• Open Time: Approximately 60 minutes at room temperature
• Nozzle Life: Approximately 30 minutes
• Develops good pre-E-coat wash-out resistance after approximately 2 hours
• Can be induction activated above 100°C for accelerated curing
• Typical oven cure temperatures: 165-200°C
• Recommended minimum room-temperature dwell before bake: 2 hours
• For maximum performance, allow 24 hours room-temperature cure before baking where practical
• Uncured adhesive may be removed mechanically before cure

Packaging & Procurement

• 400 mL dual-pack cartridges
• 18 L pails
• 182 L drums
• Additional packaging formats available upon request
• Shelf Life: Part A - 6 months; Part B - 12 months

Why This Product is Chosen for AOG / MRO

• High structural strength for bonded aluminium and composite repairs
• Excellent environmental durability in demanding operating conditions
• Broad processing window simplifies production and repair work
• Fast induction activation supports reduced repair times
• Compatible with lubricated substrates commonly encountered during manufacturing

Practical Suggestions for Your Team

• Maintain the specified 4:1 mix ratio for optimum mechanical performance.
• Use within the 60-minute open time after mixing.
• Allow at least 2 hours before E-coat or heat curing where applicable.
• Where maximum structural performance is required, allow a 24-hour room-temperature cure before oven bake.
• Verify cure schedules on production substrates when introducing new materials or lubricant systems.

Manufacturer / Aviation Spec Codes

• Product Name: 3M™ Structural Adhesive SA 9820
• Manufacturer: 3M
• Former Product Name: ANPE 941
• Product Type: Two-component structural epoxy adhesive
• Primary Application: Structural bonding of aluminium and composite assemblies
• Test Standards: DIN EN 1464 / DIN EN 1465