Sound Absorption Material STP Biplast Premium 15A Armor, 15 mm, 380x500 mm, 0.19 m2, Sheet

STP Biplast Premium 15A Armor Sound Absorption Mat, 15 mm, 380x500 mm, 0.19 m², Sheet

Individual STP Biplast Premium 15A Armor sound absorption sheet — 15 mm thick polyurethane foam, 380x500 mm, surface area 0.19 m². Reinforced adhesive layer, resistant to moisture and heat. Best sound absorption properties in the 250-6300 Hz frequency range. Ideal for rear wheel arches, doors, roof and boot lid.

Aerodynamic and Road Noise Enters the Cabin Through Large Surfaces such as Wheel Arches and the Roof.

Medium-to-high frequency noise — from road surface, air flow, and plastic creaking — is constantly transmitted through large panels such as rear wheel arches, doors, the roof and the boot lid, affecting acoustic comfort inside the cabin. Standard sound absorption materials do not always have an adhesive layer strong enough for areas exposed to moisture and temperature variations. STP Biplast Premium 15A Armor solves this problem with a reinforced adhesive, resistant to moisture and heat, suitable even for critical areas such as wheel arches.

The STP Biplast Premium 15A Armor Solution — 15 mm Polyurethane Foam, Reinforced Adhesive, Individual Sheet

STP Biplast Premium 15A Armor is a 15 mm thick sound-absorbing polyurethane foam with a reinforced adhesive layer, resistant to moisture and heat, designed for car sound deadening. An ideal choice for treating rear wheel arches, doors, roof and boot lid — areas frequently exposed to more demanding conditions than the cabin interior. Increased effective sound absorption surface, with no memory effect (returns to its original shape after compression), and additional thermal insulation properties. The viscous structure actively dampens vibrations in the vehicle's interior panels and eliminates rattling of plastic parts. Provides the best sound absorption properties in the 250-6300 Hz frequency range. Individual sheet 380x500 mm, 0.19 m² — ideal for spot repairs or small-scale projects.

What you will notice immediately after application

1. Effective sound absorption in the 250-6300 Hz range — mid-frequency noises significantly reduced
2. No plastic rattling — interior panel vibrations actively dampened
3. No memory effect — the material maintains its shape and performance over time
4. Resistance to demanding conditions — reinforced adhesive suitable for wheel arches and exposed areas
5. Additional thermal insulation — added benefit alongside sound absorption

STP Biplast Premium technology

Reinforced adhesive resistant to moisture and heat — Armor version

The Armor variant of the Biplast Premium adhesive layer is specially reinforced for resistance to moisture and heat, allowing application in areas where standard sound absorption materials might fail over time — such as rear wheel arches, exposed to splashes, dust and thermal variations from the braking system.

Viscous structure with no memory effect — sustained absorption in the long term

Unlike standard polyurethane foams that can lose thickness and efficiency over time (memory effect), the Biplast Premium 15A structure returns to its original shape after compression, keeping the effective absorption surface constant throughout the service life.

Why car audio installers choose the STP brand

STP (Standartplast) has been producing car sound deadening materials since 1996, and is one of the largest manufacturers in Europe. Biplast Premium range represents the top-tier sound absorption solution in the STP range, with the Armor variant dedicated to areas exposed to more demanding conditions.

Package Contents