WallDamp

• Double sided, self adhesive sheet of soundproofing material.
• Two step application is simple and quick.
• Pressure sensitive adhesive glues the wall together and improves overall structural integrity.
• Eliminates wall shudder, structural vibration.
• WallDamp Squares are 4 in. x 4 in. x 1/20 in.
• WallDamp Strips are 1.5 in. x 48 in. x 1/20 in. and 1 in. x 48 in. x 1/20 in.
• Lightweight, 1 lb. per sq. ft.

WallDamp is a viscoelastic material. It is not foam or vinyl, nor is it bituminous sheet material. The concept of a viscoelastic material can be broken down into two parts:

A) Visco comes from the word viscosity meaning how easily a liquid pours. For example, water is not viscous and pours easily, but honey is a viscous liquid and pours very slowly. A viscous material absorbs energy when it is forced to change shape. It takes work to deform a viscous material. A lump of clay has much viscosity. It takes work to change its shape and then it holds that shape.

B) Elastic means that something can be deformed and it returns to its original shape. A rubber ball is elastic because it returns to its original shape, even after bouncing off the floor. It takes work to deform an elastic material but the material is like a spring, and stores the energy. This is why a ball bounces back.

A) + B) = C) Viscoelastic means it takes work to deform the object and also that the object returns to its original shape. But, it just doesn’t spring back like a rubber ball.