[Richard]

Ben, I have one additional seam on the roof of the slide. It is perpendicular to the long axis of the coach. When sealing that seam, I agree that the sealant needs to be neat and does not need to protrude to catch on the seal.

The seam between the roof and the outer skin can be filleted because that area remains outside the seal contact area when the slide is in.

And none of us has mentioned the wrinkles in the corners of the seals. Newell's solution is to put a dab of silicone on the radiused wall in the area where the slide seal is wrinkled and gapped. It seems to work. I have seen slides where that silicone is applied the entire width of the slide but that is overkill. It is only needed for about an inch where the seal contacts the slide when extended or retracted.