Everbuild 201 mortar admix everbuild ad5l mortar admix is an air entraining plasticiser that replaces lime in the mix to provide an easy to work butter like consistency to the mortar and to prevent shrinkage cracking and crazing during the setting process for use in brick laying and plastering mortars provides a degree of frost resistance and long term resistance to freeze thaw cycles when set tested to bsen934 part 3 everbuild ad5l 201 mortar admix 5 litre