Which brand/make adhesive?

[Arnold9801]

I've got to fix a lot of 8x4ft insulated plasterboards in our new build to the internal concrete block walls. 

 

Can anyone recommend the best foam adhesive to use on the back of them please? 

 

Furthermore I intend to put two mechanical fixings on each sheet. Is that adequate? 

 

Many thanks. 

 

Arnold9801