SEM
SEM Copperweld 40793 Primer, 16 oz, Gold, 15 sq-ft/Can Coverage
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Overview
Built for the job.
Copperweld™ is a zinc based and copper enriched weld through primer that provides superior corrosion protection between welded substrates while minimizing heat affected zones and welding spatter.
Why Pros Choose SEM
- OEM recommended
- Zinc based formula for superior corrosion protection
- Copper enriched for improved conductivity while welding
- Minimizes the heat affected zone while welding
- Low weld spatter formula
- Smooth spraying and easy covering
How to Use
For MIG and STRSW welding
Compatibility
Compatible substrates: Copper.
Specifications
| Part No. | 40793 |
|---|---|
| Product Line | SEM |
| MFR Model | 40793 |
| Standard/Approvals | California Pro65 Warning: Cancer | OSHA and GHS Hazard |
| Application | For MIG and STRSW welding |
| Manufacturer | SEM |
| UPC | 646786407932 |
| Brand | Copperweld™ |
| Maximum Sale Quantity | 6 |
| Maximum Sale Day | 7 |
| Solids Content | 17.3% |
| Color | Gold |
| Container Size (oz) | 16 |
| Coverage (sq-ft) | 15 |
About SEM
SEM Products specializes in paint adhesion systems, flexible coatings, and plastic repair — the go-to choice for interior and trim refinishing.
Frequently Asked Questions
What surfaces can SEM be used on?
SEM is compatible with Copper. Always ensure the surface is properly cleaned, degreased, and sanded before application to achieve the strongest adhesion and a professional finish.
What size does SEM come in?
This listing ships SEM in a 16 (CN) container. Check the autofxmart catalog for other sizes and bulk pricing.
How fast does autofxmart ship SEM?
Most in-stock orders for SEM 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 SEM product genuine?
Yes. autofxmart is an authorized distributor of SEM 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 SEM?
The MPN for SEM is 40793. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.
Documents & Safety
- Safety Data Sheet (SDS)
- copperweld_40786_specification_sheet.pdf
- 40793%20Copperweld%20Weld%20Thru%20PrimerUSA.pdf
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.
Cure & dry schedule
Timing at 77°F
Flash
10 min
Tape-free
1 hr
Recoat
30 min
Full cure
24 hr
How to apply
Steps
1Clean and degrease the surface, then scuff as needed.
2Mask off surrounding panels and trim.
3Mix to the product's ratio and strain.
4Apply 2–3 even coats, flashing between each.
5Let cure fully before sanding, buffing, or assembly.
Specifications
Full data
Frequently asked
Good to know
SEM is compatible with Copper. Always ensure the surface is properly cleaned, degreased, and sanded before application to achieve the strongest adhesion and a professional finish.
This listing ships SEM in a 16 (CN) container. Check the autofxmart catalog for other sizes and bulk pricing.
Most in-stock orders for SEM 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 SEM 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.
The MPN for SEM is 40793. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.
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