1. 3M Products

3M™ Impact Resistant Structural Adhesive (IRSA)

Part Number 73333M ID 7100050351
  • Formulated specifically for collision absorption in OEM-specified structural bonding applications
  • Two-part epoxy bonds steel and automotive aluminium, great for lightweight structures
  • Can be weld-bonded or rivet-bonded immediately after application
  • Affords long work times (up to 1 hour) to help ensure precise bond with fit-up
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Product Details
  • Formulated specifically for collision absorption in OEM-specified structural bonding applications
  • Two-part epoxy bonds steel and automotive aluminium, great for lightweight structures
  • Can be weld-bonded or rivet-bonded immediately after application
  • Affords long work times (up to 1 hour) to help ensure precise bond with fit-up
  • Can be rapidly cured with heat (approx. 30 minutes)
  • Silver-colored adhesive turns purple as it cures, indicating when process has begun
  • Excellent extreme temperature performance
  • Corrosion inhibiting formula

3M™ Impact Resistant Structural Adhesive (IRSA) is formulated for true automotive OEM-specified structural bonding applications, excellent for collision absorption in steel structures and advanced lightweight aluminum alloys. This two-part epoxy adhesive delivers extended worktimes – up to 1 hour – and can be rapidly heat-cured. The adhesive changes from silver to purple as the adhesive cures.

Engineered to withstand higher impact vs. traditional bonding adhesives, 3M™ Impact Resistant Structural Adhesive (IRSA) is excellent for OEM specified automotive structural applications. It adheres to properly prepared automotive substrates including mild steel, high strength steel and aluminium; vital as OEMs strive to achieve high strength in increasingly lightweight structures. This two part epoxy adhesive is recommended for all weld bonded and rivet bonded joints when specified by an OEM. It provides an extended work time up to one hour and cures rapidly with heat (30 minutes at 80° C). Adhesive applies in a silver color and changes to purple as it cures, indicating when the curing process has begun. 3M™ IRSA is designed to absorb collision energy forces and delivers increased torsional rigidity for OEM specified automotive structures. It allows for spot welding (form squeeze type) in an uncured state, typically up to three hours after application. Properly applied adhesive will seal joints completely, and perform when exposed to very hot and cold temperatures. 3M™ Impact Resistant Structural Adhesive is available in 200 ml cartridges.

Specifications
Adhesive Type
Two-Part Epoxy
Consistency
Paste
Container Size
6.76 fl oz (US)
Container Size (Metric)
200 ml
Container Type
Cartridge
Cure Time
24 Hours
Handling Time
5-10 Minutes
NPVI Mktg
Yes
Shelf Life in Months (from date of manufacture)
12
Volume (metric)
200 mL
Work Time
60 Minutes
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