CSR FireSeal fire and acoustic sealant

CSR FireSealsuptrade

CSR FireSeal is a superior adhesive sealant with high acoustic and fire rated properties, suitable for use in commercial and residential building construction. It is a PSA composite, non-slumping, low VOC, low modulus, fire and acoustic sealant manufactured to stringent product specifications.

Areas suitable for use:

  • Non fire-rated control joints in Hebel, concrete, masonry, and brickwork
  • Acoustic sealing between most common building materials such as concrete, masonry, Hebel, plasterboard, fibre cement, metals, timber and plastic as part of a suitable joint design
  • Fire rated caulking of penetrations, control joints and perimeter sealing in plasterboard

Product Options

The product is a neutral light grey colour and is packaged in a distinctive all-red coloured 600ml sausage for easy identification.

Product Features

  • Meets BCA requirements for fire and acoustic sealing
  • Fire rated for up to 2 hours for plasterboard and 4 hours for Hebel systems
  • UV Tracer assisting with Quality Insurance Inspections
  • Low VOC
  • Low odour
  • Water clean up
  • Isocyanate free
  • Halogen free
  • Excellent adhesion to most building materials
  • Will not degrade acoustic walls up to Rw67
  • Paintable

CSR FireSeal Limitations

Not recommended for continuous submersion or below water line use.

For exterior applications, protect from rain until sealant has developed a thick skin.



  1. Substrates must be clean, dry and free from oil, grease, release agents, dust and loose material. Cut the end of the FireSeal sausage and place in a suitable sausage gun.
    Extrude sealant smoothly into prepared joint, ensure sealant is fully tooled into the joint and free of entrapped air pockets.
  2. For fire rated applications, joint width should be between 10mm min. and 40mm max. (depending on application and substrates).
  3. Minimum joint depth should be 10mm or half the width for joints wider than 20mm. Install an open cell polyurethane backing rod in joints to control sealant depth. Ensure joint is fully tooled so there are no encapsulated air bubbles in the sealant.
  4. CSR FireSeal sealant cures by water evaporation; therefore cure rate is dependent on humidity, ambient temperature and joint size. Typically, on standard joints, FireSeal will form a thick skin within 24 hours.
  5. Full cure can be expected after 7 days. In humid or cool conditions the sealant cure time will be longer.
  6. Allow the sealant to form a thick skin before painting with a flexible acrylic paint. For best results, and to minimise paint cracking, the sealant should be allowed to fully cure for seven (7) days before painting.

For assistance with installation, try searching for a Gyprock plasterer, builder or repairer under the Locations tab.

Clean Up

Clean tools and equipment in water before FireSeal cures. To remove cured sealant, tools will need to be soaked in water followed by mechanical action.​