Opinion ,not factual, from someone that has zero experience with the product on marine vinyl.Is that correct Commander? My advice is from 30+ years experience.My current cockpit vinyl is 20 years old and still looking excellent.I wipe it down with bleach once a season.Charlie
Why would you make such a gross mis-statement about my experience with vinyl? Seriously, you know nothing about me and kind of demonstrated a certain lack of knowledge.
Here is a picture of some seats I made for my boat over five years ago. I made them from scratch. They fold out and make a raised double sun lounger my girls love. Not only have I built, reupholsterd and designed many boat seatings, I do antique cars. All the buying, cutting and sewing of the vinyl in my workshop,
Care of vinyl is not hard. It is extremely robust and durable. And with reasonable care will last many many years.
Like I said in the post above. Using straight bleach is a tricky proposition. You risk damaging the stitching and marring the finish of the vinyl. Straight bleach will literally eat away a thin layer of vinyl like acid. It can change the color, mar the surface, make it rough, and eat up stitching.
BTW, I also built and stitched the fold up cover you see on the boat. I built the fold up aluminum frame, and then covered it.
All the major, reputable, marine vinyl manufacturers have a 5 year warranty on their products. Most have a 3 year unconditional replacement warranty.
There are two major destroyers of vinyl, UV rays from the sun, and moisture. Most quality marine vinyl is made to resist UV rays, and is water proof. But not all. Some are merely water "resistant". This vinyl is more susceptible to, over time, having water soak into the vinyl and cause mildew.
If the water gets into the foam underneath, it can be more problematic, but is not a catastrophe. If the vinyl isn't torn or rotted, then you need to dry it out, treat it with a mildew killer that will soak into the vinyl without affecting it. IF the foam underneath is kept dry, it will kill the mildew underneath.