This is one of those things that if you think too much and ask too many questions you can never have a perfect solution.
In a similar question (not a dial), a parabolic mirror, I increased the thickness (enough to withstand the wind and the birds) and bonded a single boss (2x the diameter of the bolt) of the same material to the mirror. This method at least minimized all of the effects.
The suggestion to contact 3M about their latest and greatest is the best way to chose the adhesive.
Good luck Steve Yorktown VA At 01:23 AM 8/29/2001 -0400, [EMAIL PROTECTED] wrote:
I am consulting on a local sun sculpture which requires that an aluminum backing be glued to 6" x 24" stainless steel mirrors. They can't be screwed on for fear that the screws and holes might distort the mirror, and hence the image. The temperature exposure will range from -20 to 120 degrees Fahrenheit seasonally, and I think that the glue must be able to forgive the small difference in the metals' coefficients of expansion. Any recommendations? Silicon glue, polyurethane, epoxy, or something else? Thanks- Bill Gottesman
