[rwmurphy15]

I wanted to keep some sealant on hand just in case of any problems. As I also have the alpha TPO roof. The service manage where I got my RV said that ultra sealant would be fine for small areas or touch up without the primer. Large areas like replacing a roof vent would require both. Also something I did not know was you need a different sealant for your skylite not the ultra sealant. Ultra sealant for the rest of the areas on the roof and then a different sealant for the vertical areas. So now I carry 3 different tubes of sealant.