X-Block® Jointing Compound

USG Boral

Product details from USG Boral
  • Air drying powder joining compound
  • Give lead equivalent joints on walls and ceilings
  • Must be used for the first and second coats of X-Block systems
  • Completely filling the recess for all layers of board in the system.
  • All Knauf jointing and finishing compounds can be used over X-Block Jointing Compound as a final coat

The GIB X-BLOCK® system consists of a unique lead-free plasterboard and jointing compound designed for X-ray radiation protection.


  • X-ray shielding solution
  • Lead free
  • Easy to use compared with traditional installation procedures