“Grown to be a premium building material suppliers with uncompromising commitment to quality”

JKB unique vertically integrated operations which include 3 stone quarries, crushing and concrete batching plants, in house workshops as well as trucking fleets ensure consistent and reliable supply in any quantities, large and small alike.

JKB aggregate is legitimately mined from our own andesite rock quarries and processed in a multi staged crushing and screening plant to produce JKB renowned clean, strong, and cubicle shaped aggregates with excellent size distribution which are paramount for strong and durable building materials which are also the foundations of JKB Ready Mix Concrete and Precast products.

JKB high quality products are available in 8 locations across Central Java (Ungaran, Semarang, Salatiga, Batang, Magelang, Purwokerto, Tegal, Banjarnegara), with comprehensive trucking fleets of various sizes, we can deliver to any locations, even those with restricted access.