SEM 39681 Self Etching Primer, Gray, 1 gal, VOC Compliant
- SEM 39681 is a gray self etching primer in a 1 gal can. It is a first step coating that promotes adhesion and corrosion resistance on properly prepared bare metal surfaces. Ready to spray and quick drying, this is a standalone coating for refinish work, not a replacement part.
- Features:
- Adheres to steel, aluminum, and stainless steel to help topcoats bond and last.
- Quick drying with a typical 10 to 20 minute topcoat window supports faster booth cycles.
- Ready to spray from the can; do not thin. HVLP 8 to 10 psi at the cap with a 1.2 to 1.4 fluid tip.
- Bulk products are VOC compliant and packaged in gallons, quarts, and aerosols for shop flexibility.
- Standalone primer for properly prepared bare metal panels; not a replacement part or vehicle specific item.
- Specifications:
- Manufacturer: SEM
- Part Number: 39681
- Color: Gray
- Size / Capacity: 1 gal can
- Suitable Substrates: Bare steel, bare aluminum, stainless steel
- Application Guidance: Ready to spray; HVLP 8 to 10 psi at the cap, non HVLP 25 to 30 psi; fluid tip 1.2 to 1.4; apply 2 to 3 light coats; flash 5 to 10 minutes between coats; topcoat after 10 to 20 minutes
- VOC Information (gallon and quart): Regulatory 5.33 to 5.40 lb per gal (639 to 648 g per l); Actual 1.9 to 2.2 lb per gal (228 to 266 g per l)
- System Compatibility or Application: Self etching primer for properly prepared bare metal; do not apply color directly to the primer; not a replacement for a specific SKU
- The Self Etching Primer can also be referred to as self etching primer 1 gal, gray self etch primer, automotive metal primer, acid etch primer, and SEM 39681 primer.
SEM manufactures automotive coatings and refinishing products for professional collision repair. Self Etching Primer establishes adhesion and corrosion resistance on bare metal prior to surfacers and topcoats to support durable refinish results.
Q: Is 39681 ready to spray or does it need to be reduced?
A: It is ready to spray; do not thin. Use an HVLP cap pressure of 8 to 10 psi with a 1.2 to 1.4 fluid tip.
Q: How many coats and when can I topcoat?
A: Apply 2 to 3 light coats with 5 to 10 minutes between coats. Topcoat after 10 to 20 minutes, following booth conditions and the technical data sheet.
Q: What metals can it be applied to?
A: Apply to properly prepared bare steel, aluminum, and stainless steel. It is not recommended to apply color directly to the self etching primer.
