We used this loctite power grab all purpose construction adhesive to install vinyl backsplash in the kitchen and it worked great. No nails needed. Just need a clauk gun and easy to apply. Adheres very well to the drywall. 
Very strong adhesive power. We let it dry and cure for 24 hours and checked and it was just perfect. 
Great for filling gaps between panels too. Very effective. We even used this to patch few small holes in the drywall and it worked really well. Love it !