Impacta® Floor Underlayments by Sound Seal are premium acoustical underlayment systems that have been engineered specially for each floor covering. All floor coverings are not the same and have different requirements to insure proper installation and warranty of the floor. Each Impacta underlayment has been manufactured so that they maintain the integrity and original warranty of the floor. Impacta underlayments are complete systems, no other material except the floor covering and setting material are needed.