Dynamat Xtreme is a patented, light-weight, elastomeric, butyl and aluminum constrained-layer vibrational damper. Dynamat Xtreme conforms and fuses easily to sheet metal and other hard substrates. Material performance is optimized for temperature ranges between -10°C to +60°C (14°F to+140°F). Material can withstand temperature extremes between -54°C to +149°C (-65°F to +300°F) and is highly resistant to aging.

Acoustic Properties:The acoustic loss factor “n” is used as a measure of ability to damp structure-borne sound. It states how much vibrational energy (in steel sheets for instance) is converted to heat rather than sound. For constructions containing several layers of damping material, the combined loss factor “n comb” is used. The theoretical maximum loss factor is 1 (no vibration). An undamped 1mm thick steel panel has a loss factor of roughly 0.001 at 200 Hz. Dynamat Xtreme applied to that panel would increase the loss factor to 0.417 @ +20°C (+68°F). Multiple layers of Dynamat Xtreme can be used to improve sound damping further.

Dynamat Specifications:

Appearance:
Black butyl based core with 4 mil aluminum constraining layer, craft paper release liner
Thickness:
0.067” (1.7mm)
Mass:
0.45lbs./ft.2 (2.20kg/m2)
Acoustic Loss Factor @ Temperature
(Using ASTM method E756 @ 200 Hz):
0.081 @ +14°F (-10°C)
0.240 @ +32°F (+0°C)
0.257 @ +50°F (+10°C)
0.417 @ +68°F (+20°C)
0.259 @ +86°F (+30°C)
0.194 @ +104°F (+40°C)
0.140 @ +122°F (+50°C)
0.094 @ +140°F (+60°C)
Temperature Resistance Range:
-65°F to +300°F (-54°C to +149°C)
Chemical Resistance:
Resistant to water and mineral oils
Federal Standards Test:
FMVSS 302: Meets
Handling And Application:
Material must be stored at room temperature for best application

Storage Information:
Number Of Sheets In Stack: 50 max
Material must be stored horizontally in its wrapping

Installation: Dynamat Xtreme should be cut to the desired size before the release liner is removed. It may be cut with scissors,
knife or die. Remove dust, grease, moisture, and other foreign matter from the application surface. Peel off the release liner. The simplest application technique is to bend the mat slightly and attach it along its shortest edge. The mat is then pressed firmly into place, preferably with a roller for larger pieces. This reduces the risk of leaving air pockets, which reduce the sound damping capacity. The temperature of the mat and application surface should not be below room temperature during fitting. Heating the material is not necessary.

Coverage: How much is enough? Always the first good question. You do not need to cover the entire panel--edge to edge. Cutting the Dynamat material into one inch strips and spacing it out over a panel to achieve a 30 to 50 percent coverage will give you excellent sound deadening characteristics.

The Knuckle Test: Rap your knuckles on the panel before you install any Dynamat to learn what a bare panel sounds like. Then adhere a one inch strip of Dynamat in the center of the panel.

Rap it again to see out the sound has changed. Add another piece of material to the left and right of your center piece, splitting the difference between the edge of the panel and your center strip.

Rap the panel again to hear how the sound has changed. Repeat this process until you are satisfied with the “density” of the sound level.

Surface Preparation: The time spent in preparing the surface is equal to the satisfaction and success of your efforts. Whenever possible, sandblasting the surface of metal body panel and floor pans is highly recommended. On body panels fiberglass bodied cars, should be thoroughly cleaned before applying Dynamat.

In floor and trunk pans, weld and seal any rust holes and then prime and paint the surface area as desired.

Note: Dynamat is not a solution to the treatment of rust problems.

Clean these surfaces with a metal prep type solvent material to remove all dirt, oil, tar, glue and wax deposits. The preparation of vertical surfaces is particularly important for adhesion.

Contour Conditions: Dynamat can be heated with a heat gun to make it more pliable to stretch over humps and to penetrate valleys and crevasses. Heat the material—don’t cook it! Wear canvas or leather gloves to protect your hands from heated material.

Multiple layers: The Vibra-Mat material is 0.70" thick. The mat material can be "built up" through multiple layers for greater sound-deadening capacity if needed.

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