The PAC-HS series is designed for use when an acoustical seal is needed in an joint with high levels of movement. The PAC HS can expand and contact up to 50% of tis design width allowing for and air tight acoustical seal. The PAC HS is acoustically tested up to an STC 52. The PAC HS is available in several silicone colors from Dow or Sika. The PAC-HS is sold in width available from 2″ to 8″ in 1/4″ increments. It comes in 6ft 6 in lengths, prepackaged and compressed. The two part adhesive is included.