HelicalFix - Crack Stitching Bars

High tensile stainless steel crack stitching bars used for reconnecting cracks in walls.

Helical Crack Stitching Bar Image

Available in a selection of lengths and diameters, crack stitching bars are a proven and effective solution for reconnecting and reinforcing cracked brickwork. Crack repair rods are bonded into the bed joint to extend 500mm across cracks in walls and can withstand a tensile load of at least 8kN.

Stainless steel brick stitching bars have a tensile strength that is double that of conventional rebar and a spiral twist that permits a degree of torsional yield within elastic limits and the high fin profile provides an excellent key for bonding into mortars.

  • Repair, stabilise and reinforce cracked brickwork
  • Minimal cost and little disruption to install
  • Redistributes loads
  • Work with thixotropic, cementitious grout to enhance the tensile, shear and flexural capacity of masonry walls
  • Provide resilience against further cracking
More Information:


HelicalFix crack stitching bars are available in AISI304 grade Austenitic Stainless Steel. AISI316 stainless bars are available on special request. The bars are supplied in the following standard sizes

  • Lengths: 1.0m, 1.5m and 2.0m
  • Diameter: 5mm, 6mm, 7mm, 8mm and 9mm

N.B. – Standard 1m x 6mm bars are available through our webshop. Please call for alternative lengths and diameters.

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Product Specifications

TYPICAL PERFORMANCE LOADS in 35-40mm slot at 400mm embedment length (taken from CE Mark Testing)

BS EN 845-1:2013 National Annex NA states that the bars need to provide an equivalent performance to the prescriptive 30mm x 5mm lateral restraint straps and the tension straps should have a declared tensile load capacity of at least 8kN

Bar Diameter & Number of Bars Per Joint
Tension Load
6mm Single Bar
7mm Single Bar
8mm Single Bar
9mm Single Bar
6mm Double Bar
7mm Double Bar
8mm Double Bar
5mm Triple Bar

Single bars bedded 20mm deep: Double bars placed 15 & 25mm deep: Triple bars buried 10, 20 & 30mm deep. Height of slot at least 3mm greater than diameter of crack stitching bars.


*See downloads below for full Performance Tables and Mechanical Properties.