I think you can use simple green.
Black spots on marine vinyl.
The main characteristic that separates marine grade vinyl and regular vinyl is marine grade vinyl has uv protection and is mold mildew resistant.
Marine vinyl and other fabrics are especially difficult to clean.
Spray with water or a multipurpose cleaner spray let it soak in for 30 seconds then wipe off.
Those little black specs of spider droppings on vinyl seats can also be removed this way.
If you catch it early on removing mold and.
How to clean mold mildew and black spots off vinyl boat seats.
If your boat is stored near lakes rivers and oceans this is often a given.
Mildew challenges boaters from cabin to cockpit.
A solution made of bleach should work but if you need it to be environmentally friendly for disposing the cleaning solution into the lake river etc.
Not only are the black spots unattractive but they can keep you from enjoying your time on board and even diminish the overall value of your boat.
Are your seats hard vinyl seats attached to the boat.
We are not pointing fingers but this is usually the 1 reason marine vinyl breaks down.
The real problem is how the material is cared for and cleaned.
Your boat tends to be outdoors longer in the warm weather leading to the promotion of mildew growth.
In this article the pros at boating deliver guidance that will help you decide whether to clean or replace mildewed vinyl.
Quick drops in temperature.
Cleaning vinyl boat seats.
There are few things more frustrating for a boat owner than mildew stains taking over your vinyl seats and comfy cushions.
The black tar like spots that are all over your vinyl siding are more than likely a fungus called sphaerobolus stellatus better known as artillery or shotgun fungus although it s most often found on the east coast it can grow anywhere and especially thrives in areas that have cool damp springs or rainy fall weather conditions.