So here are the results of my extensive panel bonding research. Bonding wood to aluminum. From top to bottom:
GE silicone. Just caulking really. No bonding strength at all. Not even that good for around the kitchen sink.
Liquid Nails. Dries hard. No flex. Not real strong of a bond either. Comes out like toothpaste so it doesn't stick on angles when applying. When joints fail the surface has a sticky, wet film on it like it never cured next to the aluminum.
Beats the Nail. About the same as the liquid nails on all accounts.
Diversatech silicone. Skins over in 5 minutes so not very good at initial bond. Very flexible. If You want to build up an area and then compress it like a gasket this works well.
Loctite PL 3X. Better than the rest but not real tacky when you initially bond.
Loctite PL MAX Premium. Premium price but overall winner. Applies well; flows good. Very tacky when bonding. This will sound strange but it dries flexible, but still able to sand it and even feather it into a surface. Too bad it was the last one I tried.
Vise grips, never fail.
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