Faded or mismatched interior trim doesn’t always mean a full reupholstery job. SEM’s Classic Coat is a line of OEM color-matched aerosols built specifically to renew or restore the color of leather, vinyl, and plastic interior surfaces — this listing is the Very Dark Pewter shade, matched to GM color code 642H (WA642H).
Applied in 2–3 light coats with a 5–10 minute wait between coats, it’s formulated for superior adhesion and flexibility so it won’t crack or peel on surfaces that flex — a common failure point for ordinary spray paint used on vinyl or leather. Full cure takes 24 hours at 70°F (21°C); avoid heavy use or abrasion during that window even though the surface will feel dry sooner.
Proper surface prep matters for how well this adheres: clean with SEM Soap and a scuff pad, then a dedicated prep product (Vinyl Prep for vinyl, or Plastic & Leather Prep for leather) before applying. Skipping prep is one of the most common reasons a coating like this underperforms.
A practical care note, directly from the manufacturer and echoed in real customer feedback: shake the can vigorously for a full minute after the mixing ball starts rattling, and spray the can upside-down for a few seconds after each use to clear the tip. One verified buyer reported the nozzle clogging mid-project on their can — the manufacturer’s own clog-prevention steps (and clearing a stuck tip with SEM’s XXX Universal Gun Cleaner, rather than a pin or other object) are worth following closely to avoid the same issue.
Key Features & Benefits
| Feature | Why It Matters | Benefit |
|---|---|---|
| OEM color-matched (GM 642H Very Dark Pewter) | Mismatched interior color is an obvious, hard-to-fix mistake | Confidence you’re ordering the exact factory shade |
| Flexible, crack- and peel-resistant formula | Vinyl and leather flex with seat movement and temperature changes | A finish that holds up on surfaces that bend, unlike rigid paints |
| Fast recoat (5–10 min between coats) | Lets you build full coverage in one sitting | Faster project turnaround |
| Works on leather, vinyl, and plastic trim | Interiors mix multiple materials | One product for several surfaces in the same colour |
| Clog-prevention steps built into use instructions | Aerosol nozzles are a common failure point for textured/thick coatings | Following the shake/clear routine reduces the risk of a ruined can mid-job |
Product Highlights
- OEM-matched GM interior color: Very Dark Pewter (642H / WA642H)
- Flexible coating that resists cracking and peeling
- Applies in 2–3 light coats, 5–10 minutes apart
- Works on leather, vinyl, and plastic interior trim
- Full cure in 24 hours at 70°F (21°C)
- ~10 sq. ft. coverage per can
Use Cases
- Restoring faded leather or vinyl seats, door panels, or dash trim to original color
- Color-matching a repaired or replaced vinyl/leather panel to the rest of the interior
- Refreshing plastic interior trim alongside leather/vinyl for a consistent interior color
- OEM-accurate interior restoration on GM vehicles using this specific color code
Who Is This For
- GM vehicle owners restoring an interior finished in Very Dark Pewter (642H/WA642H)
- DIYers and upholstery/restoration shops needing an OEM-accurate, flexible interior coating rather than a rigid general-purpose spray paint
- Not intended for exterior body panels or rigid plastic parts outside the interior — this is formulated specifically for leather, vinyl, and interior trim
- Buyers comfortable following a proper prep routine (cleaning + scuffing + prep product) before spraying, since skipping prep affects adhesion