3M Fastbond is not Milloxane and the 3M product is the current choice. Come to think of it, is Polyurethane Specialties still making Milloxane. Magnepan used Milloxane because it was likely the best choice available 45 years ago. I always thought that Milloxane resulted in too much weight added to the diaphragm; however, I have no data.
The real beauty of Winey's design is the simplicity of the panels and the relatively ease of repair. I'm currently working on some ESLs and they are significantly more complex considering the problems caused by the high voltage on the stators and membrane.
Good luck with your rebuild!
Last time I visited Magnepan in White Bear-the claims was Miloxane provided a bit of damping for the panels.
That's why they still use it one older panel repairs.
It also seals the tweeter wires to prevent early corrosion.
As mentioned it has a UV inhibitor.
I'm all for easily repaired panels, but Dap won't do that.
The Milloxane on the older panels give you this ease-Dap doesn't. Simplicity in design as mentioned.
Personally if these old styles lasted 10-15 years before needing repair that's fine IMHO, because regardless of repair method, those fine tweeter wires are going to corrode and fail by then anyway.
A few easily repaired bass wires isn't a big problem.
IMHO it's also akin to adding coatings to stock type paper cones. It usuallys end up sounding worse, as you aren't taking into account the stock driver parameters.
Same thing with Magnepans, they were designed around a certain weight and dampening characteristic of the O.E. adhesive. These magnets have only so much stored energy.
Just like cone drivers, or even speakers for that matter, you have to take into account all the supporting members. Looking at one particular aspect, the glue, realistically, needs to take these other factors into account.
Perhaps to some, it might be heavy-but I'm fairly confident this was taken into account by Winey.....
