3M
3M Automix Fiberglass Repair Adhesive 8271 400 mL Cartridge Green
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Hazardous material · Liquid
Liquid hazmat ships ground-only via UPS/FedEx with a per-item carrier surcharge applied at checkout.
Shipping restrictions apply
Ground freight only (UPS/FedEx). Cannot ship via Air, USPS, or to PO boxes. APO/FPO addresses excluded.
WARNING: Cancer & Reproductive Harm
This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.Tap for details → P65Warnings.ca.gov
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Overview
Built for the job.
3M™ SMC/Fiberglass Repair Adhesive - 3 is a two-part urethane used to bond rigid plastics, such as Sheet Molded Compound (SMC), Fiber Reinforced Polyester (FRP), Fiberglass, Metton® and primed metal.
Why Pros Choose 3M MMA
- Two-part urethane or two-part epoxy adhesives effectively bond rigid plastic
- Commonly used to bond backup strips to SMC and FRP (traditional fiberglass)
- Frequently used for backside reinforcement repair on a variety of plastic components
- Adhesive offers excellent sag resistance
- Automatic mixing
- Excellent sag resistance
- Excellent for bonding headlamp buckets
- Achieves maximum work strength fast
- Excellent absorption into fiberglass mat or cloth
- Low viscosity
Compatibility
Compatible substrates: Fiberglass, Plastic, SMC.
Compatible paint systems: Urethane, Epoxy, Polyester.
Specifications
| Part No. | 8271 |
|---|---|
| Product Line | MMA |
| MFR Model | 08271 |
| Standard/Approvals | OSHA 29 CFR 1910.1200 |
| Manufacturer | 3M Products |
| Trade Mark | Automix™ |
| Alternate Part Number-1 | 60455050264 |
| UPC | 051135082713 |
| Brand | 3M™ |
| Maximum Sale Quantity | 6 |
| Maximum Sale Day | 7 |
| Composition | 30 to 60% Methylene Phenylene Isocyanate, 30 to 60% Urethane Prepolymer, 10 to 30% Diisocyanatodiphenylmethane Polymer, 7 to 13% Talc, 7 to 13% Aluminum Silicate, 1 to 5% Thickening Agent |
| Application Time | 3 min |
| Specific Gravity | 1.288 |
| Odor/Scent | Slight Isocyanate |
| Color | Green |
| Container Size (mL) | 400 |
| Setting Time | 10 min |
| Flash Point | >383 deg F |
| Container Type | Cartridge |
| Form | Liquid |
| Temperature Rating (deg F) | -40 to 180 |
| Curing Time | 30 min |
About 3M
3M is a global leader in abrasives, masking, and body repair products. Trusted by OEM collision centers for high-performance prep and finishing solutions.
Frequently Asked Questions
What surfaces can 3M MMA be used on?
3M MMA is compatible with Fiberglass, Plastic, SMC. Always ensure the surface is properly cleaned, degreased, and sanded before application to achieve the strongest adhesion and a professional finish.
What is the cure or dry time for 3M MMA?
The curing time for 3M MMA is 30 min. Drying and curing times may vary with temperature, humidity, and film thickness — always consult the Technical Data Sheet (TDS) for exact cycle conditions.
What size does 3M MMA come in?
This listing ships 3M MMA in a 400 container. Check the autofxmart catalog for other sizes and bulk pricing.
How fast does autofxmart ship 3M MMA?
Most in-stock orders for 3M MMA ship the same or next business day from our US warehouse. Expedited options are available at checkout. Freight-class items may require an additional 1–2 days for carrier pickup.
Is this 3M product genuine?
Yes. autofxmart is an authorized distributor of 3M products. Every unit is factory-fresh, sealed, and backed by the manufacturer's standard warranty. If you have a concern, contact support@autofxmart.com and we will make it right.
What is the manufacturer part number (MPN) for 3M MMA?
The MPN for 3M MMA is 8271. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.
Documents & Safety
DANGER: This fiberglass repair adhesive contains hazardous chemicals that can cause serious health effects including cancer, reproductive harm, and organ damage. It is flammable and toxic if inhaled or absorbed through skin. Required PPE: safety glasses, chemical-resistant gloves, protective clothing, and respirator. Use only in well-ventilated areas away from ignition sources. Can cause severe eye and skin irritation. Always refer to the full SDS before use.
Why Buy from autofxmart
- Authorized distributor — authentic, factory-fresh stock.
- Fast US shipping — most orders ship within 1 business day.
- 30-day returns — buy with confidence.
- Pro-shop pricing — bulk discounts available on request.
- Expert support — questions? Email us at support@autofxmart.com.
Specifications
Full data
Frequently asked
Good to know
3M Products MMA is compatible with Fiberglass, Plastic, SMC. Always ensure the surface is properly cleaned, degreased, and sanded before application to achieve the strongest adhesion and a professional finish.
The curing time for 3M Products MMA is 30 min. Drying and curing times may vary with temperature, humidity, and film thickness — always consult the Technical Data Sheet (TDS) for exact cycle conditions.
This listing ships 3M Products MMA in a 400 container. Check the autofxmart catalog for other sizes and bulk pricing.
Most in-stock orders for 3M Products MMA ship the same or next business day from our US warehouse. Expedited options are available at checkout. Freight-class items may require an additional 1–2 days for carrier pickup.
Yes. autofxmart is an authorized distributor of 3M Products. Every unit is factory-fresh, sealed, and backed by the manufacturer's standard warranty. If you have a concern, contact support@autofxmart.com and we will make it right.
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