Table of Contents
Overview
KnuKonceptz Kno Knoise XT 120mil butyl sound deadener is a constrained layer dampener for resonant panel noise. It uses butyl rubber between constraining layers, with an aluminum backing that reinforces panels and reduces vibrations and rattles.
Also, the material adheres directly to panels in car audio systems, classic automobiles, HVAC ducts, computer cases, and kitchen sinks.
Realistic expectations: This material is designed to deaden the panel it touches by stopping vibrations that generate noise. It supports vibration control through a rigid aluminum layer, a viscoelastic butyl layer, and added mass.
Key takeaways
- The 120mil butyl dampener uses 3.0mm butyl rubber and a 12mil aluminum constraining layer.
- Each square foot weighs 1.21 pounds, adding mass to the treated panel.
- The pack contains 10 sheets and covers 13.2 square feet.
- Each sheet measures 18.11 inches by 10.51 inches.
- The material meets FMVSS 302 and lists operating and maximum temperature ranges.
What the product is designed to do
A constrained layer dampener reduces resonant noise by controlling panel vibration. Also, its viscoelastic butyl layer sits between constraining walls and disperses energy while adding mass.
The rigid outer aluminum backing reinforces the panel. As a result, the assembly reduces vibrations and rattles instead of flexing with the treated surface.
The material is intended for direct panel contact. Suitable contexts include car audio, classic automobiles, HVAC ducts, computer cases, and kitchen sinks.
Materials, dimensions, and technical details
| Specification | Detail |
|---|---|
| Dampening material | Butyl rubber |
| Total thickness | 120mil or 3.0mm |
| Overall thickness | 3.3mm |
| Aluminum layer | 12mil |
| Weight | 1.21 pounds per square foot |
| Sheet size | 18.11 inches by 10.51 inches |
| Coverage | 13.2 square feet across 10 sheets |
| Operating temperature range | 10F to 130F |
| Maximum temperature range | -50F to 350F |
| Flammability standard | Meets FMVSS 302 |
The vibration dampening sheets combine a thick butyl layer with a rigid aluminum top layer. In addition, the mass-to-area ratio supports vibration control by requiring more energy to create panel movement.
Installation and placement notes
Installation follows a cut, peel, and stick process. Next, place the self-adhering butyl onto a clean, dry panel and apply firm hand pressure.
A utility knife, scissors, or tin snips can cut the material. Also, a flat wood roller is optional, and no solvents are required.
Curved panels may require more careful handling because the aluminum layer is thick and rigid. Review patterns also include gloves, a heat gun, a roller, or relief cuts for contoured surfaces.
For vehicle work, this car door damping guide fits the same direct-to-panel installation context. A vehicle panel trim tool guide also covers interior and exterior panel access.
Performance characteristics described
The 12mil aluminum layer acts as a rigid constraining wall. Also, it is intended to stop vibrations rather than flex with the panel.
The 3mm viscoelastic butyl layer disperses energy while adding mass. As a result, the treated panel requires more energy to vibrate.
At 1.21 pounds per square foot, the butyl vibration dampener adds substantial mass to the application area. Its stated function centers on panel deadening, resonant noise reduction, and control of vibration-generated noise.
Review patterns buyers commonly mention
Buyers commonly focus on the thickness and rigidity of the aluminum layer. Also, recurring feedback calls the material thick, substantial, and heavy per square foot.
Handling and installation effort form another repeated pattern. In addition, curved-panel work often involves gloves, a heat gun, a roller, or relief cuts.
Adhesion quality and overall material thickness also appear repeatedly. The amount of work required during installation remains a common theme.
Pros
- Uses 120mil butyl rubber with a 12mil aluminum constraining layer.
- Adds 1.21 pounds of mass per square foot.
- Includes 10 self-adhering sheets with 13.2 square feet of coverage.
- Meets FMVSS 302.
- Supports cutting with common hand tools.
Cons
- The rigid aluminum layer may resist easy shaping on contoured panels.
- Sharp metal edges can require gloves during handling.
- Curved surfaces may require a heat gun, roller, or relief cuts.
FAQ
How do you install the sheets?
Cut the material to size, peel away the backing, and press it onto a clean, dry panel. A roller is optional.
What materials do the sheets use?
They use butyl rubber with a 12mil aluminum constraining layer.
How thick is each sheet?
The butyl layer measures 120mil or 3.0mm. Overall thickness reaches 3.3mm with the aluminum layer.
How much area does the pack cover?
The 10-sheet pack covers 13.2 square feet. Each sheet covers 1.32 square feet.
What temperature ranges apply?
The operating range runs from 10F to 130F. The maximum range runs from -50F to 350F.