100% Silicone vs Dicor

joeshmoe wrote:

covered wagon wrote:
I have tested using no sealant around the outside, only applying the bytle tape between the mating or mounting surfaces. However, I go to the professional heating and air conditioning supply house to get the stickiest stuff on the planet. It has not leaked yet. When it oozes out thats a good sign, meaning its properly applied. only need a plastic scraper and a rag to clean it, not a mountain of elbow grease'

Can you name this most "stickiest" stuff so readers can look into it for themselves? And do you use it on the roof, too or just the sides/mouldings?

I use it on the sides only. My new water fill door was put on about 5 yrs ago and so far so good w/o perimeter caulking. It sits out all winter in the PNW.

The sticky stuff I get at Johnson Air Products in Portland, Oregon. Stocked up front so the Heating and Air contractors can remember to grab it when needed, it is wider and stickier than the standard hardware store grade.