If the brush feels prickly it s not soft enough and will harm the fabric.
Boat canvas cleaner.
Increase soak times and agitation as necessary.
First one container was barely enough for a 16 boat cover.
Then use a large sponge or brush to clean off the canvas.
303 marine multi surface cleaner tackles challenging stains on marine canvas.
Wipe up any excess with a clean cloth.
Spray until wet then use a cloth or medium soft bristle brush to loosen contaminants.
If the boat cover is acrylic you will need to re treat it for water repellence check with the manufacturer of the cover for the right solution to use.
Using a gallon every 16 20 would make it far too expensive for the results.
If you own a boat you know what a chore it can be to remove mildew from canvas and other surfaces like vinyl.
Use a clear silicone spray to lubricate the zippers in your marine canvas regularly.
One of the best ways to keep sunbrella shade fabrics looking good is to hose fabrics off on a monthly basis with clean water.
Clean the canvas spray it with thetford s foaming canvas cleaner and scrub it with a damp sponge or soft brush.
I used it on my canvas boat cover.
Give it a good rinse with a hose and give it a place to drain allowing it to dry again before you use it.
Spray the the silicone onto the zipper and work it back and forth into the zipper.
On my boat i get a lot of mildew on the vinyl seat bolsters even though they sit outside in the sun.
Includes wrist lanyard to keep hands free.
It contains robust degreasers and other cleaning agents.
Rinse it and repeat if necessary.
Since your boat s canvas is regularly subjected to a wet or at least damp environment mold prevention is the goal of canvas maintenance.
It s easier work with the canvas stretched in place or laid over sawhorses or on clean concrete.
With boat cleaner in hand create a water cleaner solution to thin it out and ensure that you get full coverage from the boat cleaner.
For this reason i have tried a few different methods for cleaning mildew from boat canvas and vinyl.
It looked to me that it would take a gallon of the product to make enough liquid to do any good.
Then it did not clean well at all.
Modern boat canvas is usually made from a synthetic fabric like dacron or nylon rather than cotton.
When it s time for a thorough cleaning sunbrella shade fabrics can be cleaned while still on an awning frame or size permitting they can be removed.
Snappi america s 1st patented tool to clean and lubricate metal snap heads found on boats rvs trucks and all outdoor equipment.
Taking care of your boat s canvas cover is an essential part of boat cleaning especially if it s been left on your boat all winter.
