ACOUSTICFIRE ZERO SEALANT is a dual application product that helps prevent the passage of fire and smoke as well as achieving a high acoustic seal. The sealant has excellent adhesion to a wide range of substrates and will not harden or crack with age. ACOUSTICFIREZERO SEALANT provides high movement capability in fire rated linear joints and around penetrations in sub-structures including our own ranges of faced slabs and coated batts (see website for more details).