KLEN International (74) Pty Ltd is a wholly Australian owned and operated company. KLEN was established in Perth, W.A. in 1974 and entered the market manufacturing chemicals and surface coatings for the building and paving industries. Since those early days KLEN has become one of the largest suppliers of stonecare products for the slate, terracotta, concrete, clay, limestone, natural stone and porcelain paver markets across Australia.