Duramix by 3M
Duramix 8323 Factory-Match Seam Sealer 200 mL Black/Amber Cartridge
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Hazardous material · Liquid
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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™ Factory-Match Seam Sealer uses two-part urethane technology to provide a tough flexible material for the sealing of joints on primed or painted substrates such as steel or aluminum enclosures. This material provides excellent flexibility and elongation properties along with a medium/high viscosity and produces a…
3M 8323 Factory-Match Seam Sealer is a low-viscosity liquid designed for sealing seams and joints in automotive body repair before filler or paint application. The 200 mL cartridge delivers consistent flow for smooth, gap-free coverage on a wide range of substrates.
The sealer cures to touch in approximately 30 minutes after an application window of 10-15 minutes, allowing rapid progression to subsequent coats. It provides 10-13 coats per cartridge on typical panel thicknesses and adheres to ABS, aluminum, bare metal, e-coat, fiberglass, FRP, galvanized steel, OEM plastics, primer, SMC, and standard steel surfaces, ensuring reliable bonding across diverse repair scenarios.
Handling requires full respiratory protection, chemical-resistant gloves, eye protection, and protective clothing due to acute toxicity, aspiration hazard, and skin corrosion potential. Use in a well-ventilated area and follow the SDS first-aid guidelines for inhalation, skin contact, eye exposure, and ingestion.
Why Pros Choose Duramix by 3M DUR
- Metered static mixing with dual syringe cartridge eliminates the difficulty and mess of manual mixing
- High-performance two-part urethane seals vertical or horizontal seams to match OEM seals
- Flows slightly and softens on the edges without tooling for a rounded appearance
- Quick cure time and non-sag property aids during vertical applications
Application Guide
- Clean and degrease the substrate (ABS, aluminum, steel, etc.) to remove oil, dust, and contaminants.
- Shake the 200 mL cartridge thoroughly before use; no mixing ratio is required for this single-component sealer.
- Apply the sealant with a brush or low-pressure spray gun in thin, even passes. Allow 10-15 minutes of open-time between coats.
- Build up to 10-13 coats as needed to achieve full coverage and seam fill.
- After the final coat, let the material cure for at least 30 minutes before handling or applying topcoats.
Compatibility
Compatible substrates: Steel, Aluminum.
Compatible paint systems: Urethane.
Specifications
| Part No. | 8323 |
|---|---|
| Product Line | DUR |
| MFR Model | 8323 |
| Standard/Approvals | OSHA 29 CFR 1910.1200 |
| Manufacturer | Duramix by 3M |
| Alternate Part Number-1 | 60455030563 |
| UPC | 051135083239 |
| Brand | 3M™ |
| Maximum Sale Quantity | 12 |
| Maximum Sale Day | 7 |
| Composition | 3 to 7% 1,1-Methylenebis(Isocyanatobenzene), 40 to 70% Polyurethane Prepolymer, 15 to 40% Dicyclohexylmethane-4,4-diisocyanate (HMDI), 1 to 5% Urethane Prepolymer, 1 to 5% Benzene, 1,1-methylenebis [Isocyanato, Homopolymer], < 0.5 Carbon Black |
| Application Time | 10 to 15 min |
| Color | Black/Amber |
| Container Size (mL) | 200 |
| Flash Point | >=290 deg F |
| Container Type | Cartridge |
| Form | Liquid |
| Temperature Rating (deg F) | -20 to 180 |
| Curing Time | 30 min |
- Product
- 3M 8323 Factory-Match Seam Sealer
- Form
- Liquid, 200 mL cartridge
- Application Time
- 10-15 min
- Cure Time
- 30 min
- Number of Coats
- 10-13
- Compatible Substrates
- ABS, aluminum, bare metal, e-coat, fiberglass, FRP, galvanized, OEM, plastic, primer, SMC, steel
About Duramix by 3M
Duramix by 3M is a trusted manufacturer of professional auto body and refinish products used by collision repair shops and restoration specialists across North America.
Frequently Asked Questions
What substrates is the 3M 8323 Factory-Match Seam Sealer compatible with?
It can be applied to ABS, aluminum, bare metal, e-coat, fiberglass, FRP, galvanized steel, OEM panels, plastic, primer, SMC and standard steel surfaces.
How long does the seam sealer take to cure?
The product cures in approximately 30 minutes after application.
What personal protective equipment is required when using this seam sealer?
Use eye protection, chemical-resistant gloves, protective clothing and a respirator as recommended by the SDS.
How many coats are typically applied?
The recommended number of coats is between 10 and 13.
Documents & Safety
DANGER: This seam sealer contains hazardous chemicals that can cause serious health effects including cancer, reproductive harm, and organ damage. Required safety equipment: chemical-resistant gloves, eye protection, protective clothing, and respiratory protection. Avoid skin and eye contact, inhalation of vapors, and ingestion. Use only in well-ventilated areas. Can cause severe eye damage and skin irritation. Always refer to the full SDS before use.
Why Buy from autofxmart
- Authorized distributor — authentic, factory-fresh stock.
- Fast US shipping — orders ship within 2 business days, lower 48 only.
- 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
Duramix by 3M DUR is compatible with Steel, Aluminum. 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 Duramix by 3M DUR 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 Duramix by 3M DUR in a 200 container. Check the autofxmart catalog for other sizes and bulk pricing.
Most in-stock orders for Duramix by 3M DUR 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 Duramix by 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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