Originally Posted by Beersmith
Has anyone had experience good or bad with bonding ports without fasteners?
My boat has Goiot
ports which hinge open or shut by a handle which is screwed through the plexiglas which in turn is glued to the aluminum
frame round it.
I have had lots of experience with these. Mostly bad
But also some good expeience.
The bad experience is from the smaller ports ( about 35x20 cm ) which have a friction hinge to keep the port in whatever position it is left. The hinge is really the problem. If it is not used a lot it seizes and when pushed hard enough the hinge does not budge and the plastic comes off, usually with all the sealant attached to it.
So you start all over again. It does not matter what sealant is used. Silicone is good and sikaflex is also good up to a point.
My main hatch
( 60x60 cm ) which has a different hinge with a spring to help it on opening has stood the test of time
This is the good experience.
What I'm really saying is that the strength of the bond has limits. If you press hard enough it will fail.
So you need to think of what forces can be applied to your ports in use.
Hope this helps a little and wish you luck.