The vinyl rear window on a Mazda Miata convertible soft top is made well but is susceptible to damage. The vinyl can crack or tear due to pressure on the window in extremely cold temperatures, or the surface can become cloudy with age or excessive sun damage. Preventative care is the best way to keep a Miata soft top window is top condition. But if damage does occur there are options for repairing the window instead of replacing it.
Repair cracks or holes in a vinyl window with a vinyl patching kit, which usually includes sheets of patching material, an adhesive and an applicator. The procedure generally involves washing the window first with warm water and a mild detergent and drying it with a non-abrasive cloth. Next, cut the patching material so it is approximately 1 inch wider and longer than the hole. Use a small brush or provided applicator to brush the adhesive on one side of the patch. Place it over the crack or hole with the adhesive side down and press down firmly for at least one minute. The adhesive should completely dry and create a permanent bond with the vinyl window in 24 hours.
Restore a cloudy or scratched vinyl window by applying an all-purpose plastic cleaner, such as Meguiar's #17 Plastic Cleaner and #10 Plastic Polish. Use a foam applicator to gently rub a small amount of the cleaner with a circular motion onto the vinyl window. Wipe away the residue with a clean microfiber cloth. Follow the same steps to apply and wipe away the polish. These products are also recommended by Miata enthusiasts for regular use in keeping the vinyl window clean and protected.
Replace the vinyl window if none of the above fixes work. Driving with a cracked or cloudy rear window can impair your ability to see traffic behind you, thus causing a safety hazard. Have a professional convertible top installation company install a new vinyl window or consult www.miata.net for tips on how to do it yourself. The window can be replaced without replacing the entire soft top.
