Based on this product's specifications, here are some alternatives and similar models
Repair Putty K2 Mega Bond 40 g — K2 B323 — metal-repair steel-like filler
Summary description:
K2 Mega Bond 40 g is a metal-repair putty designed for filling, rebuilding and restoring damaged metal surfaces. Supplied in a 40 g tube, this steel-like repair compound adheres to metal substrates to fill cracks, dents and holes before sanding and finishing. Suitable for automotive, bodywork and small metal repairs where a strong, workable filler is required.