• Over 6000 productsOver 6000 products
  • Next Day Delivery on orders confirmed before 2pmNext Day Delivery on orders confirmed before 2pm
  • 8 depots for national coverage8 depots for national coverage
Product Information
Technical Datasheet
Safety Datasheet


Silverliner® Open State Cavity Barrier (OSCB) is developed to protect the voids between the outer façade and the inner construction element of the building. The product is designed for use in a ventilated façade, the Silverliner® OSCB allows for 25mm or 50mm linear air gap to ensure movement of air and drain any moisture within the facade. The aluminium foil restricts fibre migration and offers a class ‘0’ rating. In the event of a fire the intumescent outer edge of the product will expand and close the ventilation gap between the product and the façade preventing the passage of fire and smoke from one compartment to another.


  • Between the inner substrate and the external building envelope
  • In conjunction with Paraflam® where vertical Cavity Barriers are required
  • Where movement of air and moisture is required
  • Systems to cover void ranges from 2mm - 550mm


  • 3rd Party approved - EWCL5 WarringtonFire
  • Assumed working life of 25 years
  • Non-combustible core
  • ‘Dry fit’ solution, no cure time
  • Fast installation using brackets