Isolatie Online is a Dutch online retailer specializing in insulation products and building materials for home improvement and construction projects. Its extensive range includes glass wool, stone wool, PIR, EPS and XPS, insulation foils, thin insulation boards, and biobased options such as hemp, cellulose, flax, and wood fibre. Customers can also shop for related building supplies, including timber, sheet materials, fasteners, EPDM, plasterboard, tools, and sealants.

The store organizes products around practical applications, helping customers find solutions for roofs, walls, floors, crawl spaces, bathrooms, garages, sheds, ceilings, foundations, and soundproofing. It also offers insulation products with integrated finishes, including PIR boards combined with plasterboard, OSB, or other panel materials. Its catalogue features brands such as Kingspan, Knauf, Recticel, Rockwool, Isover, Isovlas, and Soprema.

Isolatie Online provides product information and building-physics guidance, including explanations of R-values and lambda values, alongside personal advice by phone and email. The site highlights delivery options, customer-selected delivery dates, collection in Nieuw-Buinen, and free shipping on orders above €2,150.