Overview
Built for the job.
1K HS clear is a high solids clearcoat, perfect for refinishing small accessories, door jambs, underhoods, inner panels and new part cut ins.
SEM® 40923 1K HS Clear is a high-solids (15.4% solids) matte clearcoat delivered in a 20 oz aerosol can, designed for rapid top-coat applications on automotive panels where a low-gloss finish is required.
The formulation provides 23.4 sq ft of coverage per can at a film thickness of 1 mil and adheres to e-coat, OEM primers, and plastic substrates without additional pretreatment. Its high-solids chemistry delivers a consistent matte appearance while maintaining the durability expected for clear finishes.
Use in a well-ventilated area; the product is classified as flammable with a flash point of -97 °C and contains several hazardous components. Required PPE includes eye protection, chemical-resistant gloves, protective clothing, and a respirator approved for organic vapors.
Why Pros Choose SEM SEM
- Improved fan pattern is second only to a spray gun
- Three gloss levels gloss, semi gloss and matte
- Matches OEM finishes
- Quick drying for increased production
- Shop floor (NESHAP) compliant
- Save time and material
- Reduces repair time and steps to maximize shop efficiency
How to Use
For small accessories, door jambs, underhoods, inner panels and new part cut-ins
- Thoroughly clean the substrate (e-coat, OEM finish, or plastic) to remove dust, grease, and contaminants; ensure the surface is dry.
- Shake the aerosol can vigorously for at least 30 seconds before use to disperse the solids uniformly.
- Apply a light, even spray at the recommended distance (approximately 6-8 in.) to achieve a film thickness of about 1 mil per pass.
- Allow the first coat to flash (visible drying) before applying additional passes; continue spraying until the total coverage reaches approximately 23.4 sq ft per can.
- After the final coat, let the finish cure in a well-ventilated area; store any remaining product in a cool, dry place.
Compatibility
Compatible paint systems: 1K, Clearcoat.
Specifications
| Part No. | 40923 |
|---|---|
| Product Line | SEM |
| MFR Model | 40923 |
| Standard/Approvals | California Pro65 Warning: Cancer | GHS and OSHA Hazard | NESHAP 6H |
| Application | For small accessories, door jambs, underhoods, inner panels and new part cut-ins |
| Manufacturer | SEM |
| UPC | 4647864092333 |
| Brand | SEM® |
| Solids Content | 15.4% |
| Container Size (oz) | 20 |
| Finish | Matte |
- Coverage
- 23.4 sq.ft. at 1 mil per can
- Compatible Substrates
- E-coat, OEM, plastic
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 substrates can I apply SEM 1K HS Clear to?
The clearcoat is compatible with e-coat, OEM finishes, and most automotive plastics.
How much area does one 20 oz aerosol can cover?
One can provides approximately 23.4 sq ft at a film thickness of 1 mil.
What personal protective equipment is required when spraying this product?
Use eye protection, chemical-resistant gloves, protective clothing, and a respirator as specified in the SDS.
How should I store SEM 1K HS Clear to maintain its shelf life?
Store the can in a cool, dry location with adequate ventilation. Avoid extreme temperatures and direct sunlight.
What are the key safety hazards associated with this aerosol clearcoat?
The product is classified for acute toxicity, aquatic toxicity, compressed gas hazard, eye damage, flammability, organ toxicity, oxidizer, and reproductive toxicity. The flash point is -97 °C.
Documents & Safety
Danger - This aerosol contains highly flammable propellant and toxic solvents that can cause serious eye injury, skin irritation, respiratory distress, and environmental harm if released. Wear safety glasses or goggles, chemical-resistant gloves, protective clothing (coveralls), and a suitable respirator when spraying. Avoid inhalation, skin contact, and eye exposure; keep away from heat sources and open flames. 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
This listing ships SEM in a 20 (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 40923. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.
What Our Customers Say
Thanks! Your review was submitted and will appear after moderation.
No reviews yet — be the first to review this product.
