Mortabond Dura-Plas (Optima) Cement Paint PuttyDURAPLAS OPTIMA is Mortabonds new 3 in 1 damp proofing cement paint putty with damp proofing property. It is a non toxic, semi flexible, odorless and bubble free cement paint paint putty used as concrete plaster topping requirements prior for painting jobs. Duraplas Optima is highly recommended for exterior such as external concrete wall and firewall use and other related works. Add water to mix and easy to apply by using cement trowel.