Mercury Cowl Finishing Compound
$54.91
Genuine Mercury high-gloss cowl finishing compound designed to remove minor scratches, light oxidation and surface imperfections from Mercury outboard cowls while restoring a deep factory-quality shine.
Compatible With:
- Mercury FourStroke Outboards
- Mercury Verado Outboards
- Mercury Pro XS Outboards
- Mercury SeaPro Outboards
- Mercury Racing Outboards
- All Mercury gloss-finished outboard cowls
The Mercury Marine 859026K1 Cowl Finishing Compound is a genuine Mercury OEM fine-grit polishing compound specifically formulated to remove minor scratches, light oxidation and surface imperfections from Mercury outboard engine cowls. Designed for use on Mercury’s factory-painted cowl surfaces, this compound restores gloss and helps bring faded or weathered cowls back to a showroom-quality finish.
The fine-grit formula safely removes light scratches, scuff marks and surface blemishes while producing a deep, high-gloss finish. It is ideal for use as the final polishing stage before applying a protective wax coating. Regular use helps maintain the appearance of your outboard and protects your investment from the effects of UV exposure, salt spray and general wear.
Manufactured to Mercury Marine specifications, this compound is suitable for all Mercury outboards with gloss-finished cowls and is commonly used by professional marine detailers and service technicians. The convenient 8.4 oz (250ml) bottle provides ample product for routine cowl maintenance and restoration.

















