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How to best use Stanley Mirror Mastic?

I am installing a 4ft X 6ft bathroom mirror on a 1/4 inch thick equally sized sheet of plywood already installed on the bathroom wall. I'm using a L bracket bracket on the bottom for support and planning to use Stanly Mirror Mastic on the back of the mirror. After the mirror is installed, a ''picture'' frame will be installed on top of the mirror/plywood backer board. I am uncertain about how to use the Mastic as I have never used it before.

What is the best way to use the Mastic? Do I have to use clips at the top of the mirror or will the mastic hold it to the wall?


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Make sure the wall where the mirror is going to be, is perfectly flat.
if you are going to install the 4x6 ft mirror. you need minimum of 3/8" board, if not 1/2".
yu use mastic the same way you use caulking. on the safety side, I recommend you install upper and lower railing.
the mastic will hold the mirror, three glop on each side and enough in the body of the mirror. press on hard, but too hard you will break the mirror
the mastic will take about a week to cure completely.

Posted on Nov 18, 2008

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