STP Soundproofing
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STP Plasma Car Sound Insulation Sheet
STP Plasma is listed as a 4 mm multilayer automotive sound-insulation sheet. It combines a polypropylene-foam sound-absorbing layer with a mastic membrane, providing two functional layers in one sheet.
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STP Lava Car Sound and Heat Insulation Sheet
STP Lava is listed as a 5 mm sandwich material for automotive noise treatment, combining sound-absorption, soundproofing and thermal-insulation properties. It is based on recycled polyurethane foam with an adhesive layer stated to hold securely on vertical surfaces.
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