STP SPLEN is made from polyethylene foam, which serves as a sealing, heat and sound insulating layer. For installation in various types of vehicle, agricultural machinery, household appliances, and for door and window units. It can resist temperatures from -45°C to 80°C.

The polyethylene foam (PE foam) has a foamability, divisible by 05, 10, 15, 20, 30, with a thickness of 4 and 8 mm. An adhesive mounting layer is protected with anti-adhesive coating.