Easy-To-Use Self-Stick Soundproofing

Dexdamp soundproofing is an excellent way to reduce noise and vibration. Dexdamp can be applied to metal or PVC conduits and automotive floor boards, headliners, trunks, door panels or engine fire walls. Note: Dexdamp 423 and SikaDamp 630 are the same product under different labels.

Dexdamp Soundproofing For Plumbing, Boats & Vehicles

Dexdamp is a pressure sensitive elastomeric vibration damping material. How's that for a mouthful? In plain English, it's a flexible, peel and stick sheet which can be applied to a variety of surfaces to reduce vibration and noise. Best of all it's less expensive than Dynamat.

Dexdamp's damping material is covered with a thin aluminum foil layer which improves performance and provides a paintable, finished surface. Ordinary film adhesives can fail if the bonding surface is not perfectly clean, especially on vertical surfaces. Dexdamp is different. It will bond to almost anything, even oily metallic surfaces.

dexdamp sound dampening sheets

Buy Dexdamp Soundproofing Online


Soundproof Water Pipes & Soundproof Drainage Pipes

Dexdamp sheets dramatically reduce noise associated with plumbing in condos, houses, apartments and office buildings.

The peel strength of Dexdamp easily outperforms conventional felted asphalt dampers and does so at a lower weight per-unit area. The super adhesion and conformability of Dexdamp results in maximum surface contact, critical for high performance damping.

The construction industry has been using Dexdamp for years. It's an excellent way to reduce or eliminate unwanted noise in plumbing pipes and sewage lines. The flexible peel and stick sheets can be cut to size and molded to any shape. Here's a step-by-step "how to" guide for soundproofing water pipes, sewage lines and plumbing conduits using Dexdamp.

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Without removing Dexdamp's protective backing, align a sheet lengthwise along the pipe or conduit. Wrap it around the pipe. In this example, a vertically aligned Dexdamp sound dampening sheet is not wide enough to wrap around the entire pipe. If the sheet is not wide enough — if there's a gap in coverage — rotate the sheet 90° in either direction to better cover the pipe. Without removing the protective backing, check the reoriented sound dampening sheet again for fit by wrapping it around the pipe.
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After determining the sheet fully covers the pipe, you may trim off any excess material using a scissors. Peel off the protective backing covering the adhesive. The sticky side will adhere to almost anything. Press the sticky side of the sheet onto the pipe. Wrap the sheet around the pipe until it's fully covered. Repeat the proceedure using additional sheets until the pipe is covered top to bottom. Couldn't be easier!

You don't have to be a construction professional to install Dexdamp. The one foot by two foot peel and stick sheets are easy to install. You'll be amazed how well they work. Compare Dexdamp to Dynamat or Dynamat Xtreme. Why spend more for Dynamat?

Quieting 2014 Scion tC

Scion's sporty blend of value and style has proved popular with young people. While the automotive media has generally given the Scion family of vehicles good reviews, some complain they can be a little noisy.

Instead of complaining about the noise, the owner of this brand new Scion had us do something about it.

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    Preparing Scion For Sound Dampening
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    Interior Stripped (front view)
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    Interior Stripped (rear view)
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    Dexdamp Sound Dampening Installed
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    Dexdamp Under Headliner
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    A Quiet Ride From Now On

Dexdamp auto soundproofing sheets are perfect for this sort of thing. They're an effective and affordable method of quieting the interior of any vehicle. Applying sheets to the floor board and ceiling reduces road noise. Carpeting the front cabin and firewall with Dexdamp muffles engine noise.

When we finished, the car owner drove away in a car that looked like a Scion but sounded like a Silver Spirit.

Repairing Gas Spill Damage

Hauling gasoline inside a car is extremely dangerous. Static electricity or an open flame can ignite accumulated fumes and trigger an explosion. Fortunately, when a fuel canister tipped over on the back seat of this 2008 Subaru Outback there was no explosion. But, the spilled gasoline trashed the seat foam and carpet, then turned the soundproofing into slimy goo.

After we stripped and scrubbed the interior, the owner wondered if it was necessary to replace the damaged soundproofing. It hadn't been very effective; the car was noisy. We suggested a better alternative: sheet the floor pan with Dexdamp auto soundproofing. Dexdamp is not only affordable, it's far more effective than the standard stuff carmakers install on the assembly line.

The owner liked the idea, so we installed Dexdamp from firewall to tailgate.

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    2008 Subaru Outback
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    Outback Seats Removed
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    Damaged OEM Carpet Removed
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    Interior Stripped To Floor Pan
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    Outback Floor Pan Cleaned
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    Dexdamp Soundproofing Installed
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    Rear Soundproofing
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    Self-Stick Dexdamp Soundproofing
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    Auto Soundproofing

In addition to installing better soundproofing, we saved the owner a ton of money by triple-washing the carpet and seat cover with a cleaner/fungicide instead of ordering expensive replacement sets. We also tracked-down used seat foam — less than half the cost of brand new foam. As it turned out, the owner drove off with a much cleaner, quieter car than before the accident.

Turning Down The Volume

The F-150's rich, baritone engine rumble is so desirable that Ford actually "augments" engine noise in some 2015 models, according to this report in Road & Track, "The final engine-downsizing complaint—that a V6, no matter how powerful, can't sound like a V8—is dead, thanks to Ford....under hard acceleration, the speakers play a V8 soundtrack over what little you hear of the turbocharged 2.7- and 3.5-liter EcoBoost sixes."

But, not everybody's into engine blast (real or enhanced). When you want a quieter ride, Mac's can help. The sound-dampening work we completed inside this 2014 F-150 Tremor tamed the truck's excessive noise.

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    2014 F-150 Tremor
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    Headliner Removed
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    Cabin Panel
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    Soundproofing Side Panels

In addition to engine roar, the owner complained of excessive road noise and a loud exhaust system. To do the job right, we first had to remove the center cabin console then strip the seats, padding and carpet. With access to the floor pan, side panels and headliner, our specially trained technicians went to work.

Dexdamp is ideal for this sort of project. These are flexible, peel and stick sheets custom-cut to cover almost any surface. The primary sound dampening material in Dexdamp is covered with an additional layer of performance-enhancing aluminum foil. When properly installed, the sheets reduce noise and vibration. In addition to muffling noise, the ride feels more "solid" with Dexdamp.

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    Soundproofing Floor Pan
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    Soundproofing Floor Pan
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    Soundproofing Floor Pan
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    Cuts Cabin Noise By 50%

We fastened five sheets of Dexdamp auto soundproofing to the cabin roof, then carpeted the back and side panels with ten more sheets. It took an additional twenty to cover the floor pan and remaining interior surfaces.

Results vary based on vehicle design and the number of Dexdamp sheets installed, but in this case Dexdamp made a big difference. The owner reports a much better ride — up to sixty percent quieter!

Subaru Rides Like Mercedes

One of our customers was kind enough to pass along this compliment:

"You did a superb job on our old Impreza WRX wagon. Soundproofed and new leather seat covers. A trusty and fun old car now feels a lot better than it did when it was new. Seats are way more comfortable. It feels more solidly built, as well as way quieter. Drives like a WRX, rides like a Mercedes." — James M.

Thanks James! The work we did on your Subaru proves again how great a car can drive when it's been soundproofed. Here are some pics of the soundproofing we installed before restoring the interior.

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    Subaru Impreza WRX Interior Stripped
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    Dexdamp Installed Rear Floor Pan
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    Dexdamp Installed Forward Floor Pan
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    Soundproofing Subaru Doors

As James discovered, when you upgrade your vehicle with new seat covers and soundproofing, it's almost like buying a brand new car at a fraction of the cost.

Quieting A Classic Convertible

The 1967 Barracuda convertible is a classic collector car. This one is in mint condition, but the ride can be a little noisy. A convertible is never going to be whisper-quiet, but Dexdamp sound dampening sheets can make a difference even in a ragtop. After carpeting the floor with Dexdamp, the owner reports a twenty percent reduction in road noise.

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    Dexdamp Dramatically Reduces Road Noise
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    Padding For Comfort & Additional Noise Reduction

Compare Dexdamp To Dynamat® — Dexdamp is Effective & Less Expensive

As a general rule, aluminum or plastic substrates up to 1/4", or steel to 1/8" may be suitable for Dexdamp / SikaDamp. Listed below are common damping situations.

For road noise treat the floor plan, strut towers, firewall, doors, trunk, roof and dash panels.

Use as a wrap for metal or plastic as used in plumbing drains or hydraulic systems.

Audio system performance can be improved by treating panels next to speakers or when used as part of a speaker enclosure.

May be used for bulkheads, decks, tanks, engine room ventilation ducting, fiberglass exhaust silencers and tubing.

Size: .078"x12"x24" sheets, .58psf, Color: Black with aluminum top surface, Odor: No toxic or noxious odors. Heat resistance: Continuous exposure to 250 degree F. Dexdamp can be applied prior to any baking process up to 400 degrees F. Self extinguishing per FMVSS 302.

Adhesion and Durability

Dexdamp 423 / SikaDamp® 630 has demonstrated excellent adhesion to CRS, galvanized and galvanneal steel, ELPO and basecoat and clearcoat body panels.

Material Properties Appearance: Tacky mastic with aluminum
Color: Black
Specific Gravity: 1.03 +/- 0.05
Non-Volatile Content: 99% minimum
Flash Point: 248°C
Flammability: Passes with a rating of B < 1.0
Peel Adhesion: OCRS 7-10 pli avg. ED Coat 7-10 pli avg.
Application Temperature: 15°C to 43°C recommended
Corrosion Resistance: Resistant to water and salt
Shelf Life: 3 years if stored below 35°C

Its outstanding adhesive performance allows it to maintain its position in the most demanding vertical and inverted applications, even at elevated paint bake temperatures. SikaDamp® 630 maintains its acoustic and adhesive properties after subjection to the various test conditions used in the automotive industry.

Acoustic Performance

SikaDamp® 630 is a technologically advanced formulation that offers superior damping performance at a reduced weight over traditional mastic constrained layer and asphaltic extensional dampers. The damping performance is maintained from –10°C to 60°C allowing use in any area of the vehicle.

Safety and Handling Instructions

Caution: Always practice proper personal hygiene procedures after using this product. Consult the Material Safety Data Sheet for further safety and handing instructions.


For information and advice regarding transportation, handling, storage and disposal of chemical products, users should refer to the actual Material Safety Data Sheets containing physical, ecological, toxicological and other safety-related data.


The information, and, in particular, the recommendations relating to the application and end-use of Sika products, are given in good faith based on Sika's current knowledge and experience of the products when properly stored, handled and applied under normal conditions. In practice, the differences in materials, substrates and actual site conditions are such that no warranty in respect of merchant-ability or of fitness for a particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered. The proprietary rights of third parties must be observed. All orders are accepted subject to our current terms of sale and delivery. Users should always refer to the most recent issue of the Technical Data Sheet for the product concerned, copies of which will be supplied on request.