Tom,
After applying a variety of methods (welded patch, epoxy) I believe
applying a patch from the backside of the panel aluminum or smc to be the
best. Modern two part epoxies available today are quick and lasting and
since you are patching from the underside offer minimum disturbance to the
visible side. Welding the aluminum roof sheet can result in distortion of
the sheet and turn a small issue into a large one quickly. It is much
easier to fabricate a patch panel and bond it to the backside with a
support beneath the patch to secure it in place until the epoxy has set. If
you have a cross bonding adhesive practically anything can be bonded to
anything. For holes in the aluminum sections I used patch panels of
aluminum and for the smc panels I used polycarbonate. The cross bonding
adhesive i used is 3m 8115 which requires a specific type of applicator.
Whichever type of bonding agent you choose I would not choose a single
component adhesive. You want a two part catalyzed adhesive. Once your
structural patch has set you can fill the pretty side with your favorite
filler and contour to paint.
Sully
Bellevue wa.
On Fri, Jul 17, 2020 at 12:13 PM tom geiger via Gmclist <
> This topic is hitting on a question I had too. Is there a recommended way
> to patch holes made in roof? I have a old TV antenna and CB antenna that
> would like to remove. In doing that it would leave the bolt hole
> penetrations. Was wondering how best patch and seal those holes?
>
> TG
>
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