Roof sealant

Type of roof?

Rubber

Are you talking about a coating for the whole roof or just a sealer for the seams?
Barney

The whole roof

You might want to take a look at my recent post here. I had previously coated my entire roof with Liquid Roof from Proguard Coatings. It evidently had a chemical reaction to my brand of rubber roof after several years and looked very bad although it was still weather proof.

I contacted the manufacturer and they sent me enough of a new formula material and primer to re-do my entire roof. The thread link above is what my sons and I did last week. You might want to also glance at the posts previous to it to see what transpired before. It came out great as you can see from the pictures.
Barney