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If you want a noticeably quieter Mitsubishi Eclipse cabin, choosing the right sound deadening mat makes a big difference. The right product reduces road and panel noise, damps vibration, and improves acoustics for music and conversations. This guide covers seven shortlisted sound deadening mats selected for fitment and performance for the Mitsubishi Eclipse. We evaluated materials, installation effort, and real-world noise reduction to help you pick the best option for your goals and skill level.
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Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Siless VIBRO 80 mil (2mm) Car Sound Deadening Mat — 36 sq ft |  |
| Most Popular A crowd favorite that many people choose with confidence | Noico 80 mil Butyl Automotive Sound Deadening Mat, 10 sq ft |  |
| Best Quality Built to a higher standard if you want something more solid | Siless Hybrid 3-in-1 200 mil Car Sound Deadening Mat, 25 sq ft |  |
| Best Budget The cheapest option that still gets the job done reliably | NLXCXUCY Butyl Sound Deadening Mat 10-Pack (80 mil, 10.8 sq ft) |  |
| Most Sold A high-volume bestseller chosen again and again | CUKWUYBY 80mil Butyl Car Sound Deadening Mat — 36 sq ft |  |
| Best Value for Money The sweet spot between price and what you get | Amazon Basics Car Sound Deadening Mat, 34-Piece (36 sq ft) |  |
| Best Overall The best all-around choice for most situations | KILMAT 80 mil Butyl Car Sound Deadening Mat, 36 sq ft |  |
1. Siless VIBRO 80 mil (2mm) Car Sound Deadening Mat — 36 sq ft
| Thickness | 80 mil / 2 mm |
|---|---|
| Coverage | 36 sq ft |
| Material | Butyl damping compound |
The Siless VIBRO 80 mil mat is a peel-and-stick butyl damping layer intended to cut panel resonance and lower interior noise; the product ships as 36 square feet of 2mm sheets that you trim and press into place. Installation on a Mitsubishi Eclipse is typical car-damping work: remove trim where needed, clean metal, cut panels to size, peel the backing and hand-roll the mat to ensure firm adhesion. The mat’s thick 2mm profile and high tack adhesive make it especially useful behind door skins, on the trunk lid, and on floor and rear-deck areas to reduce rattles from bass-heavy systems. Practical benefits include straightforward application without extra adhesives and the ability to layer material for heavier-duty damping. Limitations are that coverage is finite at 36 sq ft so full-vehicle treatments may require multiple kits, and you will need a roller tool for best results which is not included. Also some buyers report occasional thickness variance between batches, so measure pieces if exact 2mm performance matters.
Best for: Reliability-focused buyers who prioritize consistent, proven vibration control and want a durable, no-frills damping solution to reduce rattles and improve sound quality on a Mitsubishi Eclipse.
Less Ideal for: Shoppers seeking an all-in-one full-vehicle kit out of the box or those who prefer sprayed or fabric-based insulation should consider other approaches.
- True 2mm (80 mil) thickness for effective vibration damping
- High-tack adhesive backing for good initial stick and minimal movement
- Peel-and-place sheets are easy to trim and conform to panels
- 36 sq ft kit covers common high-impact areas like trunk, doors, and rear deck
- 36 sq ft may be insufficient for full vehicle coverage without buying extras
- Roller for optimal adhesion is not included
- Some users report batch-to-batch thickness variation
Verdict A straightforward, reliable 2mm butyl mat that delivers real rattle and resonance reduction for a Mitsubishi Eclipse but you may need multiple kits for full coverage.
2. Noico 80 mil Butyl Automotive Sound Deadening Mat, 10 sq ft
| Thickness | 80 mil (2 mm) |
|---|---|
| Coverage | 10 square foot |
| Material | Butyl with aluminum foil face |
| Installation | Self-adhesive, peel-and-stick |
This Noico 80 mil kit is a user-friendly sound deadening mat designed for DIY installation on accessible metal panels in a Mitsubishi Eclipse. Each kit contains pre-cut sheets with an aluminum foil face and a pressure-sensitive butyl adhesive backing so you peel and stick the material directly to doors, trunk floors, wheel wells, or the firewall. The embossed foil acts as an installation indicator and the high 80 mil thickness adds mass to reduce panel resonance and road noise. In practice it is easy to cut with a utility knife, bonds strongly when surfaces are cleaned, and benefits from a roller to remove air pockets and ensure full contact. Expect noticeable reduction in cabin noise and firmer-feeling door sounds after treating doors or trunk areas, but the mats add some weight and the foil can be delicate around tight corners. Also the adhesive is permanent and messy to handle, so gloves and careful prep are helpful. For Eclipse owners wanting a straightforward, effective way to quiet the cabin, this is a practical, affordable option.
Best for: Convenience-driven Mitsubishi Eclipse owners who want an easy, do-it-yourself way to reduce road and door panel noise without professional installation.
Less Ideal for: Drivers focused on the lightest possible build or those who need removable or non-permanent sound control solutions should consider alternatives.
- Thicker 80 mil construction provides strong vibration damping and improved low-frequency reduction.
- Self-adhesive butyl backing sticks well to cleaned metal for long-term hold.
- Foil embossing gives a visual cue when the mat is fully rolled and installed.
- Sheets are user-friendly size and easy to cut to fit door panels and other curved areas.
- Adds measurable weight to treated panels, which may be a concern if minimizing mass.
- Foil face can be damaged when working tight corners or with aggressive rollers.
- Adhesive is permanent and difficult to remove from skin or tools.
Verdict A thick, peel-and-stick mat that delivers clear noise reduction for a Mitsubishi Eclipse with straightforward DIY installation but permanent adhesive and added weight.
3. Siless Hybrid 3-in-1 200 mil Car Sound Deadening Mat, 25 sq ft
| Thickness | 200 mil (0.2 in / 5 mm) |
|---|---|
| Coverage | 25 sqft per roll |
| Layers | Butyl mastic, PE foam, mass-loaded membrane |
The Siless Hybrid 3-in-1 is a composite automotive mat intended to cut road and exhaust noise while adding heat insulation and vibration damping during interior treatments on a Mitsubishi Eclipse. It installs with a peel-and-place adhesive backing so you trim panels to fit door skins, floor pans, and trunk or wheelwell areas and hand-roll or tool-roll for full contact. Notable features include a thick 200 mil profile that layers butyl mastic, PE foam, and a mass-loaded membrane, which together block mid and high frequencies, reduce panel resonance, and provide a thermal barrier under carpeting or panels. The material is flexible and easier to cut and conform than rigid foil-backed sheets, making one-person installs quicker. Expect improved cabin solidity and clearer low-end from the factory audio when applied strategically. Limitations: it is not a dedicated foil-backed metal deadener, so it will not match the pure panel-stiffening performance of heavyweight aluminum-backed sheets for the lowest-frequency resonance, and full-coverage installs require multiple rolls for complete vehicle treatment.
Best for: Performance-minded owners who want to reduce cabin noise and improve perceived sound system performance on a Mitsubishi Eclipse while prioritizing materials that are effective yet easier to install than rigid foil-backed sheets.
Less Ideal for: Those seeking the maximum panel-stiffening solution for curing deep panel resonance or installers wanting a product specifically optimized only for competitive SPL applications should consider specialized foil-backed deadeners instead.
- Three-layer composite combines damping, absorption, and mass in a single sheet for multi-function performance
- 200 mil thickness provides noticeable reduction of road and exhaust noise when applied over panels
- Peel-and-place adhesive and flexible panels make trimming and fitting doors and floors straightforward
- 25 sq ft coverage per roll is a practical amount for treating key areas without excessive seams
- Does not stiffen sheet metal as effectively as aluminum-backed foil deadeners for the lowest-frequency resonance
- Tacky adhesive can be messy during installation and may require seam taping for a finished look
Verdict A flexible, multi-function 3-in-1 mat that delivers strong noise reduction and thermal benefits with easier installability, though it will not replace heavy foil-backed deadeners for extreme panel stiffening.
4. NLXCXUCY Butyl Sound Deadening Mat 10-Pack (80 mil, 10.8 sq ft)
| Coverage | 10.8 sqft |
|---|---|
| Thickness | 80 mil (2 mm) |
| Pieces | 10 pcs |
| Included components | glove |
This 10-piece kit is a budget-friendly sound deadener aimed at DIY installs on a Mitsubishi Eclipse. Each sheet combines a butyl rubber core, closed-cell foam and an aluminum foil layer to reduce vibration, block low-frequency exhaust and road noise, and reflect radiant heat from engine and exhaust areas. The mat is flexible and easy to cut to fit door skins, trunk panels, floor sections or the hood; a strong adhesive backing lets you peel, stick and hand-roll the material for good contact. For an Eclipse, this kit covers small to medium areas—good for treating doors, the trunk lid or patching rattles around the hatch. Expect noticeable noise reduction for casual use and improved mid/bass tightness rather than a professional concert-hall silence. Limitations are coverage and thickness: at 10.8 square feet and 2 mm thickness you will need multiple kits or selective placement to treat the whole cabin, and placement is semi-permanent so repositioning is difficult after adhesion.
Best for: Budget-conscious DIYers who prioritize cost-effective, targeted sound reduction on their Mitsubishi Eclipse and prefer simple peel-and-stick installation for doors, trunk and spot repairs.
Less Ideal for: Audiophiles or builders seeking full-vehicle, maximum low-frequency isolation should consider thicker professional-grade mats or buying enough material to fully blanket panels instead.
- Three-layer construction (butyl core, foam, aluminum foil) for vibration damping, heat reflection and sound blocking.
- Strong self-adhesive backing that sticks well to common automotive panels for reliable long-term placement.
- Flexible and easy to cut for DIY fitting around door skins, trunk lids and firewall areas.
- Includes gloves and multiple pieces to address several problem spots without professional tools.
- Only 10.8 sq ft total coverage so full-vehicle treatment on an Eclipse requires multiple kits.
- 2 mm (80 mil) thickness is effective for midrange and some low frequencies but thinner than heavyweight competition for maximum bass control.
- Adhesive is strong and semi-permanent which makes repositioning or removal difficult without heat and effort.
Verdict A low-cost, easy-to-install butyl mat that delivers solid spot noise reduction on a Mitsubishi Eclipse but requires multiple kits or heavier material for full, high-end isolation.
5. CUKWUYBY 80mil Butyl Car Sound Deadening Mat — 36 sq ft
| Thickness | 80mil (2mm) |
|---|---|
| Coverage | 36 sqft |
| Construction | 3-layer (aluminum foil, butyl core, adhesive) |
This 80mil (2mm) sound deadening mat is a peel-and-stick automotive insulation designed to cut road, engine, and wind noise and to reduce vibration when applied to body panels. It uses a three-layer construction: an aluminum foil outer layer for heat reflection, a butyl rubber core to absorb vibration and block sound, and a strong adhesive backing for a permanent bond. Typical use is lining floors, doors, trunk and roof panels during a DIY interior refresh; sheets are cut to fit and pressed in place. The adhesive is described as high-tack and durable, so you can expect long-term adhesion on clean metal surfaces. Practical benefits include noticeable interior quieting and improved thermal insulation compared with untreated panels, plus straightforward installation without special tools. Limitations are that coverage is fixed at 36 sq ft so larger projects may require multiple kits, and the aluminum top can have sharp edges so basic hand protection and a roller for full adhesion are recommended.
Best for: Risk-averse mainstream buyers seeking a straightforward, reliable upgrade to reduce cabin noise on a Mitsubishi Eclipse without professional installation.
Less Ideal for: Users planning full multi-panel restorations who want a single-kit solution or those who prefer a thicker professional-grade product for maximum vibration control.
- Three-layer construction (aluminum foil + butyl core + adhesive) targets both heat reflection and vibration damping
- Peel-and-stick backing simplifies DIY installation without adhesives or curing
- 80mil (2mm) thickness offers stronger damping than thinner sheets for noticeable noise reduction
- 36 sq ft coverage may be insufficient for full-vehicle projects without buying extra kits
- Aluminum facing can be sharp on cut edges so gloves and care are needed during installation
Verdict A practical, easy-to-install 2mm butyl sound-deadening kit that delivers noticeable quieting for a Mitsubishi Eclipse but may require extra kits for complete coverage.
6. Amazon Basics Car Sound Deadening Mat, 34-Piece (36 sq ft)
| Coverage | 36 square feet |
|---|---|
| Pieces | 34-piece kit |
| Backing | Self-adhesive |
| Material | Butyl-based substrate with foil facing |
This Amazon Basics sound deadening kit supplies 34 adhesive-backed mats that you cut and apply to door skins, floors, trunk lids, and other interior panels to reduce road noise and panel vibration. The mats combine a butyl-style damping layer with a reflective foil face for modest thermal insulation. In practice the material is pliable and easy to trim with scissors, and a seam roller helps it conform to curves and stick firmly to bare metal. Buyers report noticeably firmer door thuds, reduced cabin hiss on highways, and clearer bass after speaker upgrades. The package covers about 36 square feet, so it is adequate for treating a compact coupe like the Mitsubishi Eclipse if you prioritize key areas rather than full-coverage layering. Limitations are that the adhesive can struggle on factory body sealers or silicone-coated areas and the material is not the thickest on the market, so heavy-duty noise control may require additional layers or spot treatment with thicker products.
Best for: A practical optimizer who wants the biggest noise reduction per dollar for a compact coupe, focusing on targeted treatments like doors, floor, and trunk to improve cabin comfort and stereo performance.
Less Ideal for: Buyers seeking maximum, professional-grade soundproofing for a complete multi-layer build or those who need a kit tailored to full-coverage installations on larger vehicles should consider heavier commercial options.
- Large 34-piece kit gives flexible shapes for doors, floor pans, and trunk panels
- Strong self-adhesive backing makes mats stay in place once applied to clean metal
- Reflective foil face provides some thermal insulation in addition to sound damping
- Pliable material is easy to cut and shape for tight contours, easing installation
- May not adhere well to surfaces with factory body glue or silicone residues
- Not as thick as premium deadeners so maximum reduction can require layering
- One kit may be tight for complete full-coverage installations on larger vehicles
Verdict Affordable, easy-to-install mats that deliver strong value for treating key areas of a Mitsubishi Eclipse but may need layering for maximum noise reduction.
7. KILMAT 80 mil Butyl Car Sound Deadening Mat, 36 sq ft
| Thickness | 80 mil (2 mm) |
|---|---|
| Coverage | 36 square feet |
| Material | Butyl with foil backing |
| Adhesive | Self-adhesive |
The KILMAT 80 mil sound deadening mat is a self-adhesive butyl and aluminum-foil panel sold in a 36 square foot kit that you cut and press into interior panels to reduce vibration and airborne noise. Typical installation for a Mitsubishi Eclipse would be under carpet, inside doors, on the trunk lid or floor pans where panels flex and transmit road or exhaust noise. The 80 mil thickness and foil layer stiffen sheet metal and damp low-frequency vibration, which commonly improves bass response and reduces rattles. Sheets include an embossed installation indicator and stick well to clean, degreased metal; using a roller helps get full contact. Practical benefits are easier DIY fitting from pre-cut sheets and noticeable reduction in panel resonance without heavy insulation. Important limitations are that one kit covers a modest area so larger or very noisy Eclipses may need extra packs or complementary foam for airborne noise, and aluminum edges can be sharp when cutting so gloves are advisable.
Best for: Balanced owners of a Mitsubishi Eclipse who want a practical, do-it-yourself upgrade to reduce road noise and tighten interior sound without professional installation.
Less Ideal for: Drivers seeking a complete noise-proofing solution for very loud or heavily modified Eclipses or those who prefer a single-product fix for airborne noise should consider adding thicker or complementary materials instead.
- 80 mil thickness provides strong vibration dampening and panel stiffening
- Self-adhesive butyl bonds well to clean metal for reliable long-term hold
- Foil backing and embossed install indicator make correct application easier
- Pre-sized sheets simplify DIY installation and contouring to doors, trunk, and floors
- 36 sq ft coverage may be insufficient for a full, multi-area install on an Eclipse
- Edges can be sharp when cutting the foil-backed panels, requiring caution
Verdict Thick, easy-to-install butyl mats that deliver strong vibration damping for a Mitsubishi Eclipse but may require extra packs for full-coverage jobs.
Choosing the Right Mitsubishi Eclipse Sound Deadening Mat: Key Factors to Consider
Material and Density
The base material and density determine how effectively a mat absorbs and converts vibrational energy into heat rather than letting it resonate through panels. Thicker, higher-density layers usually perform better at low-frequency vibration damping, which is important for engine and road rumble.
Some mats combine metalized layers with viscoelastic butyl or foam composites to target a broader frequency range. Consider whether your priority is reducing bass-frequency panel vibration or mid-to-high frequency cabin noise, since material choices influence which frequencies are attenuated most effectively.
Coverage and Sheet Size
Coverage dictates how many sheets you will need and how much effort installation requires. Larger sheets can speed up installation and reduce seams, but they may be harder to maneuver into tight contours and under trim.
Think about which areas you plan to treat—doors, floor, trunk, roof—and estimate total square footage. A mat that offers efficient coverage in shapes that fit the Eclipse contours will save time and reduce waste.
Adhesion and Long-Term Bonding
Strong, long-lasting adhesion keeps mats secured to sheet metal and prevents edges from peeling, which reduces effectiveness and creates rattle risk. Look for adhesive layers formulated for automotive surfaces and temperature extremes.
Also consider initial tack for positioning during installation and whether the adhesive activates with heat for a firmer bond. Reliability matters because repeated lifting to re-seat a failing mat increases labor and may damage interior trim.
Thermal Properties and Insulation
Some mats add thermal insulation in addition to acoustic damping, helping reduce heat transfer from road and engine compartments into the cabin. This can improve passenger comfort and lessen HVAC load.
However, highly insulative layers can also trap heat against body panels, so consider how the mat will behave in your climate and whether ventilation of treated panels matters for corrosion prevention.
Installation Complexity
Installation complexity affects whether you can do the job yourself or need professional help. Factors include whether the mat requires heating for proper adhesion, whether interior panels must be removed, and how easy sheets are to cut and conform around contours.
If you prefer a DIY approach, choose mats with clear installation instructions, forgiving adhesive tack, and smaller pre-cut pieces for doors and smaller cavities. For full-floor coverage, plan for more time and possibly an assistant.
Weight and Impact on Vehicle Dynamics
Adding damping material increases vehicle weight, which can influence fuel economy and handling if applied excessively. Balance the desire for maximum noise reduction with thoughtful placement—focus on panels that radiate noise rather than coating every surface.
Manufacturers often list per-square-foot weight so you can estimate added mass. Prioritize heavy damping on large radiating panels like doors and trunk lids while using lighter layers where mass sensitivity matters.
FAQ
How much noise reduction can I expect after installing a sound deadening mat?
Results vary by material, coverage, and installation quality, but you can typically expect a noticeable reduction in panel vibration and road noise. Treating doors, floors, and the trunk often yields the biggest audible change. Complete silence is unlikely, but the cabin should feel quieter and acoustically tighter.
Do I need to remove interior trim to install sound deadening mats in my Mitsubishi Eclipse?
You usually need to remove door panels, seats, and some carpet sections to access the metal surfaces for proper adhesion. Some mats can be applied to exposed areas without full disassembly, but removing trim ensures better coverage and a cleaner, longer-lasting bond.
Will sound deadening mats prevent rust or cause moisture problems?
Most automotive-grade mats are designed to resist moisture and not trap corrosive elements when installed correctly. It is important to clean and dry metal surfaces before application and to avoid covering factory drainage channels. Proper installation helps reduce the risk of moisture-related issues.
Can I install sound deadening mats myself, or should I hire a pro?
Many enthusiasts successfully install mats themselves using common tools, heat sources, and patience. DIY installation is feasible for doors and small panels, but full-floor jobs or hard-to-reach areas can be time-consuming. Hiring a professional can ensure optimal adhesion and coverage if you prefer guaranteed results.
How do I choose between heavier butyl mats and lighter foam-based products?
Heavier butyl-based mats excel at damping low-frequency vibration and are often the best choice for reducing panel resonance. Foam-based products can improve mid-to-high frequency noise and add thermal insulation. A layered approach using both types can provide balanced acoustic results depending on your priorities.
How We Chose the Best Mitsubishi Eclipse Sound Deadening Mat
We focused on materials and installation factors that matter specifically for treating a Mitsubishi Eclipse. Key evaluation criteria included coverage efficiency, measured as how much surface area a mat typically covers; material composition and thickness, since denser or layered products usually provide better damping; adhesion quality for reliable long-term attachment to vehicle panels; installation complexity, accounting for trimming, heat activation, and the need to remove interior trim; and thermal as well as acoustic performance to ensure mats do not trap excessive heat or interfere with interior components. We also considered durability under automotive conditions, such as resistance to moisture, temperature cycling, and permanent deformation. Exclusions included generic foam pads intended for non-vehicle use, overly thin adhesive films that do not provide meaningful damping, and products that require irreversible body modifications. The final list highlights mats that balanced effectiveness, ease of installation in the Mitsubishi Eclipse, and longevity.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize materials, coverage, and installation quality when choosing a sound deadening mat for your Mitsubishi Eclipse. Focus on treatments that target the largest vibrating panels first, such as doors and floors, and balance added weight with the desired level of noise reduction. Consider your willingness to perform a DIY install versus hiring a professional, and factor in long-term adhesion and thermal behavior. Thoughtful placement and proper surface preparation will deliver the best tradeoff between a quieter cabin and minimal impact on vehicle dynamics.
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