Splashback

Hello to all.
I need some adive please and what better place to ask than here.........:D

I have a stainless steel splashback glued to a backing board. I now would like to find the best way to "stick" it to my wall. It is going behind an electric cook-top and the wall is gyprock which is over the top of masonary.
What should I use?................silicon, contact gel liquid nails..................I am confused :?

Thanks for any help in advance

I'd use a polyurethane sealant/adhesive like Bostik seal-n-flex, Bostik matrix or any of the sikaflex products. You may need to puit a couple of temporary nails or screws in the wall for it to sit on while the glue sets up if it's not sitting on the benchtop and prop it back at the top as well.

Mick