I think I should clear up some terminology.
: Holds things in place by bonding to them. Intended to act as a structural component. It’s what holds skyscraper windows in place.
Bedding compound: Acts as a sealant in conjunction with traditional hardware
. Basically is a soft gasket material you use traditional hardware
to tighten against to make a seal and keep water
Sealant: Something you use seal cracks and gaps to keep water from dripping into these cracks and gaps.
Many products are more than one of these at a time. Dow 795 for instance. It’s an adhesive
sealant. Holds your piece in place AND keeps water out (if it doesn’t fail like it does for me).
Sealant/bedding compound. Silicone. It can be used for bedding and sealing.
I am looking for a very good sealing product that is applied over gaps and cracks to prevent water from getting into gaps and cracks. I don’t need a bedding compound (butyl) and I don’t need a structural adhesive (3m 5200)
I need a sealant to close gaps and cracks to keep water out.
The window is held in place by tracks now so it can expand and contract
at will and not fall off when Dow 795 and VHB tape fails.
I have a crack at the edge of the window toward the bow to fill. I have a transition from the hull
to the upper aluminum
track to fill. I’m filling them to keep water from entering them.
The leading edge of the window toward the bow needs something incredibly flexible since it will be doing the usual thermal expansion thing that killed Dow 795 and VHB tape.
The windows do NOT have fasteners. They are held in place by upper and lower tracks.