Power wire brush or aggressively scrub with a plastic scrub pad or sandpaper all surfaces where the old caulking was.
How to redo a rubber roof.
Use warm water to sponge the surface clean then let it dry.
Unroll the membrane over the roof into the proper position.
Make sure you offset yo.
Scrape away all existing patching materials and caulking.
You can use mek methyl ethyl ketone or acetone to remove any grease stains.
On rubber roofs apply an approved rubber roof treatment to revitalize the rubber surface and protect it from uv deterioration.
Cut the material to length with a utility knife.
If the surface has suffered abrasion or other damage apply a specially formulated rubber roof topcoat to restore the surface.
How to remove repair and install a flat roof.
In order to get the best results the surface must be free from any oil or grease.
Use a razor knife to cut out old silicone caulking.
And tie it into your hip roof.
Make sure the sheet does not have creases or wrinkles.
Allow three inches of material to extend over the edges.
This is a long video but it will show you how to do it.
In order to restore the gloss you first must clean your roof thoroughly.