found it...what a faff
2. Application
2.1 Use on cement based substrates
Using a 5 – 8mm notched trowel, a continuous bed of ce- ment based single part flexible adhesive should be laid on the floor. The boards must be firmly bedded into the adhesive by gently pushing back and forth. The boards should be laid in a ‘brick bond’ pattern and checked for level with a spirit level.