Out of sight, does not mean out of mind. The fact that most end-use cellar products are below the ground means that INEOS Styrolution works extra hard to assure the materials going into these applications offer superior long-term performance - even if you do not see them.
The general purpose polystyrene grade GPPS PS 158K is used in the construction industry for insulation panels and is the ideal material for physically foamed high-quality articles. It does not collapse or loose its rigidity once formed as a panel.
DWV pipe and fittings
When numerous drain, waste and vent (DWV) pipe manufacturers have needed a high performance pipe and fitting material, they have partnered with INEOS ABS & INEOS Styrolution by using Terluran®, Novodur® and Lustran® ABS. This grade meets, or exceeds all necessary requirements for this demanding application.