Different situations and finishes require different premixes. Some premixes have a polymer additive and some have a traditional cement, lime and sand mix for an improved water resistance, adhesion and flexibility. Acrylic rendering has higher water resistance and has more strength. Acrylic rendering can be used on a variety of surfaces like cement blocks, concrete and AAC concrete panelling. If acrylic rendering is mixed correctly then it can be used on smoother surfaces like cement sheeting and new high tech polymer exterior cladding like Uni Base and even expanded Polystyrene. Some premixed acrylic renders have a distinguishably smoother surface than traditional renders. These can sometimes even be spayed on to the wall.
Now days you can even achieve a designer look with a sophisticated finishing coat that can be easily applied over an acrylic render. The coat can be sponged on, trowelled or rolled on depending upon the product. Some finishes that can be achieved are
Stone chip finish
Acrylic rendering takes up to 2 days to dry and cure as opposed to a 28 day wait period in the case of traditional rendering. Acrylic renders also have a water proof and an anti fungal property which is very essential for any exterior wall.