3M 08458 Rigid Pillar Foam, Two-Part Urethane, 200 mL Cartridge

3M 08458 Rigid Pillar Foam, Two-Part Urethane, 200 mL Cartridge

• 3M 08458 Rigid Pillar Foam is a two-part urethane foam-in-place filler supplied in a 200 mL static-mixing cartridge, designed to expand and fill automotive posts, pillars, and body cavities to restore rigidity and reduce noise.
• Features:
  • Delayed reaction time allows precise placement before expansion
  • Expands up to ten times its original volume for efficient cavity fill and minimal waste
  • Closed-cell foam structure resists moisture intrusion and maintains rigidity after cure
  • Flows into hard-to-reach areas without manual compaction
  • Replicates OEM rigid foam properties for NVH control and structural support
• Specifications
  • Part No.: 8458
  • Product Line: MMA
  • MFR Model: 08458
  • Standard/Approvals: OSHA 29 CFR 1910.1200
  • Applications: For door hem flanges, door skins, floor pans, general purpose, rear body panels, voids and gaps
  • Manufacturer: 3M Products
  • Trade Mark: Automix
  • Alternate Part Number-1: 05113508458
  • Brand: 3M
  • Composition: 15 to 40% Polypropylene Glycol Glycerol Triether, 1 to 10% Dimethyl Siloxane, Reaction Product With Silica, 1 to 10% Water, 1 to 5% Diethylene Glycol, 1 to 5% Potassium Acetate, 0.5 to 1.5% Polyalkylene Glycol, 0.5 to 1.5% Siloxane Polyalkyleneoxide Copolymer
  • Specific Gravity: 1.24
  • Color: Yellow
  • Container Size (mL): 200
  • Flash Point: >=200 deg F
  • Container Type: Cartridge
  • Form: Liquid
  • Temperature Rating (deg F): -20 to 180
  • Curing Time: 1 hr
  • Part Number 08458, 3M ID 7100004037, UPC 051135084588
• The Rigid Pillar Foam can also be referred to as rigid automotive foam filler, expanding pillar foam, noise-damping foam, body cavity rigidity foam, and two-part expanding urethane foam.

3M 08458 Rigid Pillar Foam delivers efficient and precise restoration of structural and noise-dampening foam in vehicle cavities. Its high expansion and closed-cell rigidity combine with OEM-like performance to streamline repair and NVH control in collision and bodywork applications.

Q: How much does this foam expand and fill a cavity?
A: One 200 mL cartridge expands to approximately 225 cubic inches, filling large cavities efficiently with minimal material waste.

Q: What are the work time and cure time for this foam?
A: The foam has a brief work time of about 60 seconds before expansion starts and fully cures in approximately one hour at standard ambient temperature.

Q: What areas of a vehicle is this product intended for?
A: It is ideal for replacing OEM rigid foam in posts, pillars, side reinforcement sections, floor pans, roof bows, and other body cavities to restore rigidity and reduce noise.