Quote:
Originally Posted by herlichka
I have used a mastic "tape" to set replacement windows in aluminum frame. It was approx. 3/4" wide,and came in a roll with a wax paper carrier. It applies to the flat of the edge, and stays soft enough to flex with thermal expansion and contraction. You will probably have to got to a window supplier's shop to get some, I don't recall ever seing any on a hardware store shelf.
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I think the stuff you were using might of been called butyl, it was what they used to hold windsheild in cars in the 70's and 80's before they went to urethane. You could get this stuff in different dimensions, I should have used that to seal the glazing on my pop can heater.