Ceramic backing strip

SifCeramiBac is a new ceramic backing, self-adhesive from Weldability-Sif. It is supplied in sectional strips, pre-aligned on a selfadhesive aluminium backing tape to allow secure, accurate positioning on the backside of the weld joint.

SIFCeramiBac enables welding to be carried out from one side only with full penetration, at the same time helping to reduce oxidation, eliminate hydrogen inclusion and it can be used with every weldable metal. It is said to allow the use of increased welding currents as the ceramic tiles fully support the molten weld pool, guaranteeing a sound root profile and eliminating the risk of burn though.

The increase in the welding current with supported weld pool allows increased welding speeds reducing the arc energy and the heat affected zone. The adhesive on the aluminium backing tape remains stable under high temperatures to ensure that the backing strip remains in position during the entire welding process.