The highest viscosity that can fit in the point is usually 20-100 cps. This is injected at the small drilled bullseye to flow into the point of the crack. Resin used in the rest of the crack must be over 150 cps in order to hold and not deteriorate (see table). The high viscosity resin is injected along the open-surface portion. Without the patents, the same resin used in the point must be used in the entire crack. This would result in deterioration.
As the developer and patent holder, Ultra BOND is the only company that can offer high viscosity long crack resins which are required for quality, long-lasting repairs.