Granular 1 lb. Vessel Boat and Surface Cleaner Slimy

In this review the Granular - 1 lb. Vessel from Slimy Grimy is evaluated as a concentrated cleaner aimed at boat owners and homeowners who need an easy way to remove moss, algae and iron stains. The bottom line: this product is best for people who want a heavy-duty, mixable cleaner that can be applied from a pump sprayer and often removes stains with minimal scrubbing. The reviewer found that when used as directed it restores boat bottoms and exterior siding, and that its real value lies in the cleaning power and versatility across surfaces.

Key Features

• Concentrated formula: A 1 lb. vessel is intended to be mixed in a 1, 2 or 3 gallon pump sprayer so one container treats larger areas efficiently.
• Works on many surfaces: The formula is described to clean boat bottoms, wood, stucco, brick, aluminum and all types of siding and shingles without specialized tools.
• Easy application: It is designed for spray application from the bottom up, which simplifies treatment of vertical surfaces and reduces the need for heavy scrubbing.
• Removes common stains: Customers report it removes brown algae, saltwater grime and orange oxide stains, making towels and fabrics whiter when used carefully in wash water.
• Inventor-backed brand: The product carries the Slimy Grimy name, originally created by John and Doreen Grimes, which the brand emphasizes as a point of authenticity.

Who It's For

Granular - 1 lb. Vessel is best for boat owners, DIY home maintainers and property managers who need to tackle algae, moss and iron oxide stains across a range of exterior surfaces. It is useful for people who prefer spraying solutions from a pump sprayer and want results that often require little or no scrubbing.

It is not the ideal choice for those seeking a ready-to-use consumer spray or who are unwilling to handle concentrated cleaners that must be mixed with water. Also, if immediate single-use convenience is crucial, pre-mixed commercial cleaners may be preferable.

Pros & Cons

Pros

• Effective stain removal on boat hulls and exterior siding with minimal scrubbing required.
• Concentrated format stretches to treat large jobs when mixed in a pump sprayer.
• Versatile across many surfaces including wood, brick, aluminum and shingles.

Cons

• Requires mixing and a pump sprayer for best results, which adds preparation time and equipment needs.
• Some users judge the cost relative to single-use cleaners differently; perceived value can vary.

Specifications

Product	Granular - 1 lb. Vessel
Brand	Slimy Grimy
Format	Concentrated granules for mixing in pump sprayer
Recommended dilution	Mix in 1, 2 or 3 gallon sprayer
Primary uses	Boat bottoms, siding, roofs, shingles, masonry and metal
Inventors	John & Doreen Grimes of Crafton, Pennsylvania

Our Verdict

The Granular - 1 lb. Vessel is a practical choice for boaters and homeowners who want a concentrated cleaner that delivers visible results with limited scrubbing. Its strength is in restoring exterior surfaces and treating iron or algae stains when mixed and sprayed correctly, making it a good value for larger jobs despite the need for a pump sprayer.

Frequently Asked Questions

How is the product applied?
Mix the granules with water in a 1, 2 or 3 gallon pump sprayer and apply by spraying from the bottom up for best coverage.

Will it clean boat bottoms without scrubbing?
Customers report that brown algae and grime often come off while spraying and in some cases require little or no scrubbing.

Which surfaces are safe to treat?
It is described for use on wood, stucco, brick, aluminum, siding, shingles and boat hulls; always test a small area first and follow safety precautions.