Hello everyone I am looking for some advice in swimming pool building. I have built an in ground pool using ‘pool building brick EPS25/EPS80’. I would like to use mosaic tiles on the walls but have not found any bonding agents that would adhere to the polystyrene. I have considered Wedi boards but the depth recommended is 20mm which is too think, I have also considered fibre glass meshing and am awaiting a response from the supplier. I was wondering if anyone can recommend any primers and adhesives which can be used to apply a barrier to the blocks making them suitable to tile? Thank you in advance for any suggestions.