b'NAC puts the proof AND sound control. Easy to install system provides sound controlSystem works with any NAC sound control membrane and SubSeal membrane Exceeds ANSI A118.10 and A118.13 for waterproof and sound control membranes Sound control membranes also exceed ANSIA118.12 for crack isolation providing up to 3/8crack isolation protection Same day tile installationw w w . n a c p r o d u c t s . c o m1 - 8 0 0 - 6 3 3 - 4 6 2 2'