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Installing FatMat & Rattle Trap

FatMat & Rattle Trap

Step 1:

Wipe off the surface that you will be applying the FatMat to with a cleaner that will not leave a residue. Be sure to get off all dirt and grease so that your FatMat bonds tightly. This step will make a big difference in how permanent your application of FatMat is.  Be sure that surface is completely dry before applying FatMat.

Step 2:

If necessary cut your FatMat to the needed size and shape with a utility knife then remove the backing from your FatMat and apply to the surface that you have just cleaned.

Step 3:

Make sure that you use the roller provided, this will ensure a tight bond between the FatMat and the surface. (Your fingers cannot do the job properly!!!). By using the roller you will be able to get the FatMat to stick securely to the different contours. You may find it necessary to cut the FatMat during application so that it lays flat on the surface. It is best to not leave any air between the surface and the FatMat.

FatMat Liners

  • Standard Application Procedure For: FatMat Roof Liners-Floor Liners-Hood Liners
  • Installation Time: Approx 1-2 Hours
  • Installation Tools: Degreasing Agent-Cardboard for Template (Hood Liners Only)Cutting Knife-Roller

Step 1:

Remove relevant body trimmings.

Step 2:

Clean internal surface of body panel.

Step 3:

CAUTION: Moisture will prevent adhesive from proper bonding. Please make sure all areas are absolutely dry! Apply the supplied FatMat Prior to installing the hood liner. The fatmat is placed under the liner for optimal performance. For floor liner and roof liner installation you can proceed to next step. For installing fatmat please refer to the supplied manual for proper installation of fatmat before applying your hood liner.

Step 4:

Measure installation area for proper fitment, cut excess liner prior to installation with supplied cutting knife, a cardboard template makes this process much easier.

Step 5:

Now that you have the correct size liner simply peel off adhesive paper backing and install liner on inner surface of body panel.

CAUTION: Avoid touching adhesive with fingers when removing paper.

Step 6:

Using supplied roller press firmly on the Acoustic Liner to ensure proper bonding.

Step 7:

Reinstall body trimmings.

Our FatMat Liners are constructed from space age heat shielding material and premium acoustical sound dampening products. With proper installation dramatic noise reductions as well as tremendous bass gains can be accomplished. For a complete line of FatMat products please visit us online at: WWW.FATMAT.COM or call us toll free 1-877-Fat-5060. Our staff is very knowledgeable in the sound deadening industry and can answer all your questions and concerns. Thank you for your continued support as well as helping FatMat become recognized as one of the leaders in the sound deadening industry.

Liquid Sound Installation

  • Standard Application Procedure For: FatMat Liquid Sound
  • Installation Time: Approx 2-4 Hours
  • Installation Tools: Installation Tools: Paint Brush, Spray Gun

Step 1:

Remove relevant body trimmings.

Step 2:

Surface must be clean of all oily & foreign matter.

Step 3:

Depending on your preference of installation L-Damp may be brushed, spayed or toweled on. To brush on L-Damp simply paint desired area just as you would if you were painting a wall or any other project with a brush. L-Damp is a very versatile product and has great forgiveness with errors. To spay L-Damp the following setup is suggested. A typical setup to spray L-DAMP® consists of a 30:1 airless pump, a reverse-a-clean airless gun with a tip size of 0.043", a ram and a surge tank. L-Damp exhibits exceptional adhesion to a variety of materials when properly applied, and is dry to touch in approximately one hour. Allow at least 1 hour before applying additional coats.

Step 4:

After L-Damp is applied to all necessary areas allow 24 hours for final cure.

Step 5:

Now that you have successfully installed your liquid sound reinstall body trimmings and be prepared to notice great sound dampening performance.


1/32" (32 mils) wet film at room temperature dries hard in 3-4 hours.
9/64" (140 mils) wet film at room temperature dries hard in 24 hours.
Where faster drying time is required, use forced ventilation, heat or infrared light.


Product is ready for use as received. If conditions should require thinning, use water sparingly.

Clean Up

After use, equipment may be flushed with water. Store remaining L-Damps in a warm place.


  • Sound Deadening Properties - OBERST BAR (SAE J-1637) METHOD - Composite Loss Factor of 0.060 @ 270 Hz, 77 °F. Steel thickness 32 mils (0.8 mm). Coating thickness 32 mils (0.8 mm).
  • Cold adhesion - when L-DAMP® is applied to a 10" x 10" x .035" panel of primed cold rolled steel at the rate of 0.5 lbs./sq. ft. (dry weight), shows no loss of adhesion when subjected to two 25" lb. impacts from a two inch diameter, 1 ¼ lb., steel ball at -20°F.
FatMat Sound Control™   |   Phone: 1-877-FAT-5060   |   tami@fatmat.com
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