Mastabase Bedding Cement - 20kg Bag is a plaster based cement for bedding tape into recessed edges and butt joints. It is also suitable for second coating plasterboard joints, internal and external angles and fastener heads. MastaBase has a consistent working time of 45 minutes with a 60 minute setting time. All Knauf jointing and finishing compounds can be used over MastaBase as a final coat.
- High joint strength
- Easy to scrape back
- Quick drying
MastaBase is suitable for dry and wet areas and where a fire resistance level is specified. Must not be applied over air drying compounds. Always use clean tools and containers. Pour the required amount of clean tap water into a container. Add the powder into water, mixing continuously to a thick, creamy consistency. Soaking is not recommended. Only mix enough cement to be used in 45 minutes and do not contaminate with previously mixed batches. Once the material starts to set it cannot be remixed. Knauf strongly recommends the use of paper tape for jointing. Where fibreglass tape is used, the joint must be back blocked with MastaBlock. Fibreglass tape must not be used in fire rated and wet area applications. Allow MastaBase to set completely between coats.