Plaster concrete or concrete blocks! Use SAKRETE Render Mix, a cement mix designed to provide superior adhesion and to smooth concrete walls. Available in 25 kg bags. • Premium cement mix with superior adhesion properties • Indicated for plastering concrete or concrete blocks • Designed to be easy to apply with a trowel and to provide a smooth finish • Level imperfections that are up to 3/8 in (10 mm) deep • Can be used above or below ground level • Ready to use