Skip to content
Confidence builder icon

Next day delivery

Confidence builder icon

Largest building products ranges in the uk

Confidence builder icon

Trusted technical advice

Confidence builder icon

Need help? Browse our FAQ

← Back

A New Approach To Steel Starter Bar Safety!

WISA block is a new safe and efficient way of protecting against impalement and the threat of other serious injuries posed by exposed, or poorly protected steel starter bars on concrete substructures.



  • 80% reduction in application times compared to individual rebar safety caps
  • Fully patented design – Tested to OSHA requirements with 114kG from 3m height (Blocks at 1.5m centres)
  • Innovative clamp design fits 10mm – 32mm rebar sizes
  • Ready and simple to use
  • One size fits all (10mm – 32mm)