Dicor self leveling lap seal

Thanks. I replaced the rubber insert in the track that covers the screws at the trailer edge. On the roof the end was run into a pool of butyl. The rubber was screwed into the channel from the top placing two holes in the rubber at the extreme edge. They ran a bead of lap seal along the edge of the channel and went wide enough to cover the screws and ended at the butyl. I cut the lap seal as close to the roof as I could and as close to the butyl as I could. Just wanted to make sure each would seal.

Remember lap sealant piled on lap sealant can give you a lake effect on the roof if its piled up high enough. You sure don't want water to sit up there.

It will stick to itself, as long as the old stuff is cleaned well. Not sure question #2 makes any sense - butyl tape doesn't have any strength, if it stuck to it, you'd still be able to easily pull it apart - the putty would separate.

But the normal way to use it is to bed whatever you're mounting to the roof in butyl tape, clean up what squeezes out along the edges, then put lap sealant over the fasteners and edges. Do not bed stuff in the lap sealant (as I've seen some say to do). If you ever have to do rework, you'll have a big problem trying to get stuff apart.

1. Yes

2. Yes

However, I live in the camp that removing old before applying new is always a good thing.

Although conditions on the ground will often dictate your best way forward based on how much free tree time you have. What is being sealed. Ect ...