Duramix by 3M
3M 4240 Semi-Rigid Plastic Repair Adhesive 200 mL Black/Clear Cartridge Urethane for Low-Energy
No reviews yet
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
Authorized dealer
Ships today
30-day returns
Overview
Built for the job.
3M™ Semi-Rigid Plastic Parts Repair is a two part urethane adhesive designed for bonding or back side reinforcing of many plastic parts. This formula provides a quick set up time and good internal strength needed for reinforcing and bonding of plastic parts. For best results use in conjunction with 3M™ Polyolefin…
3M Duramix 04240 Semi‑Rigid Plastic Repair Adhesive is a two‑component, low‑viscosity liquid designed for structural repairs on automotive plastics. Delivered in a 200 mL cartridge, it bonds to a range of substrates including ABS, fiberglass, polyester, SMC and primed surfaces, making it suitable for panel replacement, bumper repair, and filler applications where a semi‑rigid finish is required.
The adhesive offers a 50‑second work time followed by a 15‑minute sandable window, allowing rapid build‑up of 10–13 coats per application. Its fast cure enables efficient workflow while maintaining enough open time for precise shaping. Compatibility with both black and clear formulations provides flexibility for color‑matching repairs.
Due to the identified GHS hazards—acute toxicity, aspiration risk, and skin/eye corrosivity—use of eye protection, chemical‑resistant gloves, protective clothing, and a respirator is mandatory. Operate in a well‑ventilated area and follow standard first‑aid procedures for inhalation, skin, eye, and ingestion exposure.
Why Pros Choose Duramix by 3M DUR
- Unique formula bonds a variety of semi-rigid plastics
- Fast-curing urethane chemistry enhances productivity
- Adhesive reinforces two-sided repairs
- High-performance adhesive creates a lasting bond
Application Guide
- Clean and degrease the substrate (ABS, fiberglass, plastic, polyester, primer, SMC) to remove contaminants.
- Dispense the adhesive and apply the first coat with a smooth, even bead.
- Work the material for up to 50 seconds before it begins to set.
- Allow the coat to sandable for 15 minutes, then sand to the desired contour.
- Repeat application, work, and sand cycles to achieve 10–13 total coats as required.
- After the final coat, allow full cure per manufacturer’s recommendation before finishing.
Compatibility
Compatible substrates: Plastic.
Compatible paint systems: Urethane.
Specifications
| Part No. | 4240 |
|---|---|
| Product Line | DUR |
| MFR Model | 04240 |
| Standard/Approvals | OSHA 29 CFR 1910.1200 |
| Manufacturer | Duramix by 3M |
| Trade Mark | Duramix™ |
| Alternate Part Number-1 | 62264338302 |
| UPC | 051131042407 |
| Brand | 3M™ |
| Maximum Sale Quantity | 18 |
| Maximum Sale Day | 7 |
| Applicable Materials | Plastic |
| Composition | 30 to 60% Castor Oil, Polymer With 1,1'-Methylenebis[4-Isocyanatobenzene], 30 to 60% P,P'-Methylenebis(Phenyl Isocyante), 10 to 30% 4,4'-Diisocyanatodiphenylmethane polymer, 1 to 5% Oxirane, Methyl-, Polymer With Oxirane, Ether With 1,2,3-Propanetriol (3:1), Polymer With 1,1- Methylenebis[4-Isocyantobenzene], 0.1 to 1% Carbon Black, <0.02% Chromium |
| Application Time | 50 sec |
| Specific Gravity | 1 to 1.2 |
| Odor/Scent | Weakly Aromatic |
| Color | Black/Clear |
| Container Size (mL) | 200 |
| Flash Point | >=290 deg F |
| Container Type | Cartridge |
| Form | Liquid |
| Temperature Rating (deg F) | -20 to 180 |
| Curing Time | 1 to 4 hr |
- Mix Ratio
- 1 : 1.2
- Work Time
- 50 seconds
- Sandable Time
- 15 minutes
- Compatible Substrates
- ABS, fiberglass, plastic, polyester, primer, SMC
- Number of Coats
- 10–13
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 can I bond with 3M 04240 Semi‑Rigid Plastic Repair Adhesive?
It is compatible with ABS, fiberglass, plastic, polyester, primer‑coated surfaces, and SMC (sheet‑molded compound).
How much working time do I have after mixing?
The adhesive provides a work time of approximately 50 seconds before it begins to set.
When can I sand the repaired area?
Surface sanding is recommended after the sandable time of about 15 minutes has elapsed.
What personal protective equipment is required when using this adhesive?
Use eye protection, chemical‑resistant gloves, protective clothing, and a respirator as specified in the SDS.
Documents & Safety
- Safety Data Sheet (SDS)
- cubitronii_33460_catalog.pdf
- 3m_04240_specification_sheet.pdf
- 3M_05113104240_Specification_Sheet.pdf
DANGER: This adhesive contains chemicals that may cause serious health effects including cancer, reproductive harm, and organ damage. Required PPE: safety glasses, chemical-resistant gloves, protective clothing, and respiratory protection. Avoid skin and eye contact, inhalation of vapors, and ingestion. Use only in well-ventilated areas. In case of contact, flush eyes immediately with water and wash skin thoroughly with soap and water. 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
Duramix by 3M DUR is compatible with Plastic. 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 1 to 4 hr. 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.
What Our Customers Say
Thanks! Your review was submitted and will appear after moderation.
No reviews yet — be the first to review this product.
