For years, Harbor Master Concentrated Multi‑Purpose Cleaner & Degreaser was one of the most requested marine cleaning products across LFS locations. Commercial fishing crews used it. Boatyards relied on it. Homeowners kept it stocked in their garages. Its reputation for being powerful, safe, and highly versatile made it a staple for anyone tackling tough cleaning jobs on boats, docks, equipment, and around the home.
After disappearing from the market for several years, many customers assumed it was gone for good. But the demand never went away and now Harbor Master is officially back and available both online and in LFS stores.
What Makes Harbor Master a Standout Marine and Boat Cleaner?
People love Harbor Master because it solves a broad range of cleaning challenges without the harsh chemicals traditionally found in marine‑grade degreasers. It is 100% biodegradable, non‑toxic, and formulated without aromatic solvents that often cause irritation or strong fumes.
Its performance makes it a go‑to solution not only for boat hull cleaning, marine engine degreasing, and deck and bilge cleaning, but also for industrial facilities, food‑processing environments, and household use.
Industrial‑Strength Cleaning Power
The product is designed to remove tough contaminants such as oils, grease, waxes, tars, industrial glues, and inks. It is effective on floors, equipment, machinery, and pre‑paint surfaces.
For marine use, these properties make it suitable for:
- Cleaning fiberglass and aluminum boat hulls
- Degreasing engine compartments
- Removing dock grime and petroleum residue
- Preparing surfaces for marine paint and coatings
Safe and Biodegradable Formula
Harbor Master is non‑toxic, odorless, and safe for use in USDA‑authorized food‑processing areas. This also means it is a strong choice for eco‑conscious boat owners who want an effective cleaner without introducing harsh chemicals into waterways or workspaces.
Certifications
Proven Versatility for Boats, Homes, and Shops
The cleaner is effective on a wide range of surfaces commonly found in marine environments, workshops, and households:
- Hydrocarbon buildup on hulls
- Oil and stain removal from concrete
- Soot and tar around stoves and heaters
- Wood furniture
- Bathroom tile, tubs, and sinks
- Carpet spot cleaning and steam extraction
- Anodized metals, slate, and certain natural stone surfaces
This broad compatibility is one reason it became such a frequently repurchased product in LFS stores.
Highly Concentrated for Maximum Value
One of Harbor Master’s selling points is its concentration level. A small amount mixes into a large volume of usable cleaner. For boatyards, maintenance crews, and high‑volume users, this makes it a cost‑efficient and practical option.
Now Available in Four Packaging Sizes
To meet the needs of both individual boat owners and industrial operations, Harbor Master has returned in four size options:
- Quart
- Gallon
- 5‑Gallon Pail
- 55‑Gallon Drum
From routine hull cleaning at home to large‑scale marina or fleet operations, there is now a size suitable for every application.
Where to Buy Harbor Master
Harbor Master Concentrated Multi‑Purpose Cleaner & Degreaser is available at LFS stores, as well as online for convenient direct ordering.
If you're searching for a marine cleaner that is biodegradable, non‑toxic, and strong enough to handle the toughest boat, dock, and industrial cleaning tasks, Harbor Master is once again ready to deliver.

