I need to replace our tub drain and wanted to check which plumbers putty is the right one to use. We have a fiberglass tub with ABS plumbing below. I’ve taken the drain out before and am pretty sure plumbers putty was used when first installed. I have Oatey’s brand regular as well as stain free. Does it matter which one I use? I’ve also read that plumbers putty isn’t advised on ABS plumbing, but the putty isn’t being placed on the ABS, but on the drain/tub. Does that matter as well? Thanks for any help!