Need to make strong repairs to plaster stone concrete or wood ronseal multi purpose powder smooth finish filler is the ultimate high performance filler this filler gives excellent adhesion fills gaps up to 40mm deep a blend of superfine chalk and white plaster with added powdered polymer areas of use walls and ceilings application filling knife drying time 1 2 hour protection level high can be drilled once dried hard comes in air tight bag easy to mix buttery texture when mixed extremely easy to