Boldan Oy is a wholesale trade company founded in 2010, the operating principle of which is to serve the professionals of sewerage renovation and to offer to them products and services of high quality. Boldan Oy provides also training for using different products, procedures, and systems developed by us. Our instructors arrange basic training for starting entrepreneurs and customized trainings, among others, for installing T-liners, for steaming, installing floor drain inserts, spray casting and lining. Our office is located in Nurmijärvi, southern Finland, where we design and manufacture products for professional use. Among other things we manufacture hand-made T-liners, bladders, and lining materials of high quality.