Works great on a fiberglass gel boat. Surface must be CLEAN before applying and two coats last the entire boating season in Mich. It also takes about 2 Quarts to complete a 40 Ft. Searay boat.

I drive a black executive limousine. I had been going to the car wash at least every three days to keep my car looking pristine. A friend told me about Meguiar's Synthetic Sealant. It was incredibly easy to apply two coats. My car looks like I just got it washed and I haven't been to the car wash in three weeks! I just use the Quik Detailing Spray and Quik Wax with a micro-fiber cloth. I love this stuff!

The M21 Sealant is great! It looks amazing, hides swirls, though you should really correct them, gives amazing gloss and is very durable. A cool way to apply this is with a rotary buffer. Make sure that your pad has been prepped with the M21, put a little bit on the pad, and buff to a shine. I have personally found that I don't need to wipe with a microfiber after this. If your polishing before you seal, using your buffer will not only make the process faster, it will have a higher gloss. Not sure why but it really does look better.