This material is intended for use as a vibration damping material for steel plates. Paragraph 1.2 lists the temperature ranges in which each of the three classes of materials has optimum damping efficiency. For toxicity reasons this material should not be used at temperatures over 200°F. The choice of the tile weight per unit area depends on the thickness of the steel plate to be damped and on whether or not an aluminum constraining plate is adhered to the outer face of the tiles. When not constrained with an aluminum plate, the tiles of either weight shall be restrained with studs and a lubricated (not adhered) sheet of glass-reinforced plastic where detached tiles would be hazardous (ballast tanks of submarines) or might damage or interfere with sensitive equipment.

The weight per unit area of the tiles to be used on different thickness of steel is as follows:

Steel plate Tile thickness unit weight inch lbs. per sq. ft. Outer layer -------------------------------------------------------------------------------- ⅛ to 5/16, inclusive 2.8 None, or lubricated glass-reinforced plastic sheet held with studs ⅜ to 11/16, inclusive 4.5 None, or lubricated glass-reinforced plastic sheet held with studs ¾ to 1-¾, inclusive 2.8 Aluminum plate adhered to tiles, held with studs