ROCKCOTE Patch & Prep is a popular preparation product for render on fibre cement sheeting and concrete walls. 

Suitable: for setting joins in fibre cement sheet, and installing PVC beads and trim. As a strong adhesive base coat on difficult substrate surfaces such as smooth masonry, off form concrete and cement sheet. For interior or exterior use. It cannot be sanded, so if a smooth finish is desired apply Smooth Sanding Patch over it when dry. 
Application: apply with a trowel or spatula, 0.5 – 4mm thick. Not recommended in a single coat greater than 4mm thick on sheet or cladding.
Drying Time: 4- 8 hrs. Full cure 1 – 2 days. Once dry, re-wet 1-2 times a day with clean water.
Coverage: 80-140 lineal metres/20kg bag
Coats: 1 or 2
Technical Data Sheets: See full Technical Data Sheets and SDS