303 Marine Clear Vinyl Protective Cleaner 303 Marine Clear Vinyl Cleaner offers superior protection against the harmful effects of UV rays. 303 Vinyl Protective Cleaner is all you need to safely clean and protect against yellowing and cracking of vinyl, clear vinyl, Straraglass and Eisenglass boat windows, leaving a non-streaking finish. Use For Vinyl Clear Vinyl Strataglass Eisenglass Does not contain alcohol. Usage Directions Place a drop cloth under the item to be treated to catch any overspr