Secondary membranes to control efflorescence are now obsolete and no longer required.
Efflock added to concrete mixes such as tile beds and grout bulk impregnates the entire material to make them water repellant . Without water able to freely penetrate these materials, efflorescence cannot occur. The labour and cost savings are a big advantage, and bad weather is less of a worry with construction times. Tiles can even be wet-bedded using the Efflock system. Efflock is also ideal to mix with tile adhesive and grout which are also known sources of efflorescence.