3M Impact Resistant Structural Adhesive 07333 — 200 mL Two-Part Epoxy Cartridge, Heat-Curable OEM-Grade Impact Tolerance

This 200 mL cartridge of 3M IRSA delivers a durable, corrosion-inhibiting bond engineered for modern vehicle structures that use high-strength steels and lightweight aluminum alloys. The adhesive dispenses silver and turns purple as it cures so technicians can visually confirm proper mixing. Designed for weld-bonded and rivet-bonded joints, it offers an extended one-hour working time at room temperature and accelerates to full cure with heat (about 30 minutes at 80°C/175°F).

How does this adhesive perform under impact and torsion?

3M IRSA is formulated to absorb collision energy better than conventional bonding adhesives and to contribute to overall structural rigidity. It improves torsional stiffness while maintaining the ductility needed to manage crash forces without premature brittle failure.

• Higher impact resistance than traditional bonding adhesives
• Increases torsional rigidity in bonded assemblies
• Engineered for weld-bonded and rivet-bonded joints per OEM specifications

What substrates and repair scenarios is this epoxy suitable for?

This two-part epoxy bonds to properly prepared automotive substrates including mild steel, high-strength steel, and aluminum alloys commonly used in modern vehicle bodies. It’s intended for structural applications where OEMs specify adhesive reinforcement alongside mechanical fastening or spot welding.

• Adheres to automotive-grade steels and aluminum alloys
• Works with spot-welding (form squeeze-type) for up to about three hours uncured
• Seals joints to resist moisture and environmental exposure

How is the product used and how does curing work?

Dispense the two-part formula from the 200 mL cartridge using an appropriate static mixing nozzle and applicator. The material presents as silver when applied and transitions to purple as polymerization begins; full cure is achieved faster with heat.

• Extended work time: approximately one hour at room temperature
• Heat cure example: roughly 30 minutes at 80°C (175°F)
• Includes a static mixing nozzle for correct mix ratio and application

What system accessories and compatibility should technicians consider?

3M IRSA pairs with the 3M Dynamic Mixing System (DMS) for larger-volume work; DMS cartridges and dedicated mixing nozzles ensure repeatable mixing and reduce waste. For 200 mL cartridges, use an applicator compatible with two-part cartridge dispensing to maintain consistent flow and ratio.

• 450 mL cartridges available for DMS-compatible jobs
• Use the recommended pneumatic dispensing gun for DMS when applicable
• Static mixing nozzle included with the 200 mL cartridge

Who is this for: Collision-repair shops, OEM-approved body shops, and professional technicians who require a proven structural adhesive that meets automotive OEM performance expectations. Note: intended for industrial/occupational use only, not for consumer retail sale or household use. 3M IRSA suits technicians repairing modern vehicle structures needing impact resistance, corrosion protection, and reliable bond quality under real-world temperature extremes.