I do not use it as a regimen. I have used it and I have records to which it has been applied by others. Of those to which it has been applied, some have received the application as many as 30 years ago and have been played MANY, MANY times. If it were going to do any damage, it would have done so by now. I do not think there is any question as to whether it is safe to use. It is. Whether it "preserves" the vinyl such that it will sound BETTER after repeated plays, say, 20 years down the road, I don't know for sure. I have LP's that have been treated with LAST that sound perfect after more than a hundred plays. I have records that have NOT been treated that sound great after more than a hundred plays. I have never tried putting it on one and not the other of the same LP and then playing them both for ten years to compare the difference. If anyone has THAT type of testing information, please share.
I do not use STYLAST but, instead, I use Record Research Labs #9. I've examined styli under the microscope before and after using this stuff and it works GREAT. OTOH, you have to be careful with respect to liquid stylus cleaners. Check with your cart manufacturer to be sure you are not dealing with a cantilever that might serve as a wick to suck up the liquid into the cartridge innards. Too, one has to be careful with "dry" cleaners and the ones where you lower the stylus down and lift up to, "VIOLA", remove gunk. Ask a few cartridge distributors and they will tell you that using such cleaners is the leading cause for cartridges to return for cantilever repair (next to cleaning women accidents, that is). :-)
I do not use STYLAST but, instead, I use Record Research Labs #9. I've examined styli under the microscope before and after using this stuff and it works GREAT. OTOH, you have to be careful with respect to liquid stylus cleaners. Check with your cart manufacturer to be sure you are not dealing with a cantilever that might serve as a wick to suck up the liquid into the cartridge innards. Too, one has to be careful with "dry" cleaners and the ones where you lower the stylus down and lift up to, "VIOLA", remove gunk. Ask a few cartridge distributors and they will tell you that using such cleaners is the leading cause for cartridges to return for cantilever repair (next to cleaning women accidents, that is). :-)