Stinger RKU8 Roadkill Ultimate Universal Sound Deadener Kit 8 Square Feet with Aluminium Butyl and Acoustic Foam Layers The RKU8 from Stinger is a Roadkill Ultimate universal sound deadener kit containing two sheets with a total coverage of 8 square feet. The dual-layer construction combines an aluminium and butyl damping layer with an acoustic foam layer, delivering the combined benefits of Roadkill Expert and Roadkill Overkill in a single product. Minimum thickness is 5.5mm and the material is odourless and non-toxic. Product overview Roadkill Ultimate is Stinger's most comprehensive single-product sound damping solution, designed for vehicle owners who want to address vibration, road noise, and thermal insulation in one installation without purchasing and applying multiple separate products. The aluminium and butyl layer mass-loads the vehicle panel to reduce vibration and improve speaker bass response, while the 2mm acoustic foam layer adds a second layer of noise absorption that would otherwise require a separate Roadkill Overkill application. The material is effective across a wide temperature range of -51°C to 149°C, making it suited for use on door panels, floor areas, firewalls, and any other panel where vibration, road noise, or thermal transfer is a concern. Installation requires no specialist tools. Clean the surface with wax and grease remover or methylated spirits, cut the sheets to size, peel the self-adhesive backing, press into place, and roll flat with a Roadkill roller. The RKINSTALL roller and knife kit is recommended for best results. Features and benefits Dual-layer aluminium butyl and acoustic foam construction: The first layer is an aluminium and butyl damping material that mass-loads vehicle panels to reduce vibration and improve speaker bass response. The second layer is a 2mm acoustic foam that adds further noise absorption, combining the function of Roadkill Expert and Roadkill Overkill in a single sheet. Improved speaker bass response and output: Mass-loading door and speaker cavity panels reduces the thin metal vibration that degrades speaker performance at higher volumes, resulting in a more solid mounting surface for better bass response and improved overall speaker output. Road noise reduction: Applied to vehicle floor areas, the RKU8 reduces the low-frequency road noise that enters the cabin and contributes to driver fatigue and increased reliance on the vehicle's audio system volume. Thermal insulation properties: Rated from -51°C to 149°C, the material reduces heat and cold transfer through vehicle panels, keeping the cabin cooler in summer and warmer in winter. Particularly effective on firewalls where engine bay and exhaust heat enters the cabin. Odourless and non-toxic: The RKU8 contains no harmful or odorous compounds, making it safe for use in enclosed vehicle cabins without the unpleasant smell found in cheaper sound damping products. Self-adhesive installation: The self-adhesive backing allows the material to be pressed directly onto the cleaned panel surface without requiring separate adhesive. Each sheet can be cut to shape with a knife before application. What's in the box 2x Roadkill Ultimate sheets (18" x 32" each, 8 sq ft total) Technical specs Specification Detail SKU RKU8 Brand Stinger Coverage 8 sq ft total (2x sheets, 18" x 32" each) Minimum Thickness 5.5mm Weight 0.55 lbs/ft² Aluminium Layer Thickness 3mm Foam Layer Thickness 2mm Construction Aluminium butyl damping layer and acoustic foam layer Application Temperature -51°C to 149°C (-60°F to 300°F) Adhesive Self-adhesive backing Odour Odourless Toxicity Non-toxic Frequently asked questions What is the difference between Roadkill Ultimate, Roadkill Expert, and Roadkill Overkill?Roadkill Expert is an aluminium and butyl vibration damping material. Roadkill Overkill is an acoustic foam layer applied on top of Expert for additional noise absorption. Roadkill Ultimate combines both layers into a single sheet, delivering the same result as using Expert and Overkill together in a single installation step. What surfaces can the RKU8 be applied to?The RKU8 is designed for cold rolled steel, galvanized steel, e-coated, and clear coated panels. It is suited for door panels, floor areas, firewalls, boot floors, and any other vehicle panel where vibration, road noise, or thermal transfer is a concern. Do I need any special tools to install the RKU8?No specialist tools are required. A wax and grease remover or methylated spirits for surface preparation, a knife for cutting to shape, and a roller for pressing the material flat are all that is needed. The Stinger RKINSTALL roller and knife kit is recommended for best installation results. How much area does the RKU8 kit cover?The RKU8 contains two sheets each measuring 18 inches by 32 inches, providing a total coverage of 8 square feet. For larger treatment areas or full vehicle installations, multiple kits will be required. Contact us for guidance on how many kits to order for your specific application. Is the RKU8 safe to use inside a vehicle cabin?Yes. The RKU8 is odourless and non-toxic, making it safe for use in enclosed vehicle cabins. Unlike some cheaper sound damping materials, it does not emit unpleasant or harmful odours after installation.
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