The solution used by most professionals for tough spots on vinyl is a 50 50 solution of boat clean plus and boat scrub.
Black spots on marine vinyl.
If your boat is stored near lakes rivers and oceans this is often a given.
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.
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If this lightens the stain try exposing the stained section to the sun as much as possible for several weeks.
We are not pointing fingers but this is usually the 1 reason marine vinyl breaks down.
Those black dots and blobs look unsightly may cause the crew to stand instead of sit and cause your boat to diminish in value.
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.
I think you can use simple green.
Condensation that forms due to temperature swings can create a friendly environment for mold on your boat seats.
So how do you remove mildew from boat seats.
Your boat tends to be outdoors longer in the warm weather leading to the promotion of mildew growth.
The real problem is how the material is cared for and cleaned.
Guess what the problem isn t with the vinyl.
Are your seats hard vinyl seats attached to the boat.
12 6 2018 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.
Try rubbing a small spot with this solution on a cloth or a small scrub brush.
Clr mold and mildew and mr.
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.
The main characteristic that separates marine grade vinyl and regular vinyl is marine grade vinyl has uv protection and is mold mildew resistant.
Quick drops in temperature.
How to clean mold mildew and black spots off vinyl boat seats.