S.W.A.T. Light Duty Moisture-Resistant Laminate Underlayment is a premium 200 sqft. underlayment choice that is not only moisture-resistant, but also meets international building code. S.W.A.T. Light Duty Moisture-Resistant Laminate Underlayment is silent, water-resistant and tough, with an IIC Rating of 55, and an STC Rating of 55.