Salon window crack...Repair

[colemj]

Correct me if I'm wrong but the reason sealants fail is due to lack of elasticity and due to that, the adhesion fails. So in theory, a stronger adhesive might fair better if more elasticity is not an option?

Structural silicones, in particular the glazing formulations, are both an adhesive and a sealant. They are also specifically formulated to accommodate a large shear force. For example, Dow 795 can accommodate 50% shear movement of a joint.

A pure adhesive would likely shear apart internally, and if it didn't, it would cause the window to buckle/bulge and crack.

Almost all reasons for glazing failures are:
1. incorrect choice of glazing compound
2. too thin of a bond thickness
3. a 3-sided (L-shaped) bond instead of two separate 2-sided bonds. This is the one most amateurs fail to understand even when they get the other two correct.

Mark

 

[JamesG161]

'98 H-376 Salon Window

Once you fix it you will need this.



My 1998 H430

Jim...

 

[Ralph Johnstone]

Once you fix it you will need this.

Or go bannas and do this :

I finally installed the three hatch covers a couple of years ago.

Didn't use buttons and that was a challenge. The big plus was the drop in interior temp in the summer when the boat wasn't being used.

 

[JamesG161]

Or go bannas and do this : lol Bananas

Move to the Gulf of America to do less.

Oh no is that Dammit Jim at helm?

 

[Ralph Johnstone]

Move to the Gulf of America to do less.

What, and give up all this drizzling ice cold rain up here ?