How to make concrete: PART 2b – Admixtures and additives ...
Jan 31, 2014 · Particulate materials – Latex or acrylic additives These are used for waterproofing and adhesion (for example, when adding a surface to an older piece of concrete). They also act as plasticisers. Sealers. Water penetration through concrete can be reduced, by using special additives in the mix to block the air voids.