I have a new product that needs two 14ga powdercoated plates bonded together. One part is a 12"x12" solid sheet, the other is the same size but intricately cut. I am creating hundreds of these delicate parts, and the process needs to be fast.

Currently, I am using a spray adhesive on the delicate part, and pressing it onto the solid part, applying weights to hold pressure, and waiting 5 hours for it to set up. I think the absolute best solution would be a heat-setting spray glue that would quickly set in a heat press... or maybe fed into a conveyor oven ? I have tried contacting multiple companies like 3M, but they wont pay me any attention.

I have tried ALL the spray glues at the local hardware stores, and the only ones that work any good are the thick-bodied ones, but they always do a “webbing” effect when sprayed. Webbing absolutely does not work, since it bridges the gap of the delicate part and shows on the final product. All the other sprays are thin and only end up sticking in a few areas because the intricate side is not perfectly flat. Currently, we actually use a “sealant” to bond the parts, Its the best we have found so far is "Flex Seal" (flexsealproducts.com)

Maybe an adhesive roller system might also work for applying the adhesive ? (https://www.hotmelt.com/collections/adhesive-roll-...)

Project requirements: 1) best if the bond is nearly clear when cured 2) bonds within 10–120 seconds. 3) be able to be applied to only 1 of the surfaces 4) Thick bodied since the parts are not always perfectly flat 5) compatible with polyester powder coat 6) if heat cured, needs to cure <250 deg f. so that the powdercoat doesn't melt 7) bond strength does not need very strong, its just artwork. 8) bond needs to be waterproof after cure, for outdoor use 9) A one-part spray seems best, since a two-part would require mixing and have a short shelf life

Thanks for your time and help.

Below is a sample of a similar product