I have a small glass device (I can not divulge what it is at this point, nor it's function sorry) that I need to prevent from sliding around on a smooth surface when it is touched/bumped, etc. I would like to keep the glass optically clear for aesthetic reasons, so I am looking for some kind of product that can be applied to the bottom of the glass to give it some friction (rubber feet are not an option, it needs to be in contact across it's entire surface for structural reasons).
The area in contact with the surface is roughly 250x250mm square and has nearly no mass to it. It needs to be able to be removed so a glue is of no use here, and it needs to be cleanable with soapy water. Is anyone aware of such a product? The first thing that comes to my mind is hair spray, but its not impervious to water, nor is it optically clear.
Whatever it is it also needs to be cheap, the final cost of the device needs to be kept down to be competitive and as such expensive materials need to be avoided.