Inefficient over time in applications I've tried this on. This form of the product at least avoids the problem of glue residue becoming unusable after you open it for a single use as it is intended for single use only. My use case this time was trying to fix a mechanical keyboard switch that broke after the keyboard accidentally fell onto an insurmountable obstacle. This ended in failure, then reapplying failed as well, although this may have been operator error as I had allowed the glue to spread too far and damaged the key mechanism. I have had an experience where all repairs I have attempted with this product have failed. It's completely ridiculous, but here it is. [This is effective for accidentally entangling my fingers!]