I noticed at Home Depot that they sell an Oatey branded "No. 95
Tinning Flux" that supposedly "pre-tins" the pips and prevents the
flux from burning out or the pipe from oxidizing ("turning
green"). They say it is especially good on larger pipes.

Has anybody had any epxerience using such tinning fluxes vs. a
standard flux like the Oatey #5 Past flux?

- Does it really work better on larger pipes?
- What about on smaller pipes?
- Any disadvantages (other than higher price) to using it all the
time?