What are you doing with it if I may ask? The PCB ties FT furnishes are clad and gapped on both sides (clarifying - top and bottom). I see no obvious benefit to the the one side versus two but I guess there could be.
For bonding to the roadbed, you can use contact cement. Pliobond is what FT sells and it is a very good product. I have always used DAP Alex Plus. It is an acrylic caulk that also contains silicone. Water clean up, paintable, tenacious adhesive power, cheap at any Ace, Lowe's, or HD. Plus it does not have a high solvent content so out gassing and shrinkage are not a problem.
Paul
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