Any form of silicone should be avoided IMO (of course)
http://skunkpharmresearch.com/spraying-butane-directly-on-silicone-mats/
I've sprayed directly into parchment with just butane, no cannabis..upon contact, flakes of silicone are visibly apparent..and I've blasted onto parchment many, many fucking times myself..damn it..lol
Being stubborn, I thought to buy an oil slick pad, as it's” supposed to be” solvent resistant..
I'm not clear on who did the experiment, it may be in the above link..
But the experimenter weighed the slick pad then soaked the pad in a pool of butane, after the soak, he weighed the pad again... The pad weighed significantly more after it's butane bath.
This concludes it for myself anyway..
I used to LOVE my parchment ..
I still use parchment for storage however..just because the glass dishes are plain robbery.
I use the cheap unbleached brown parchment paper. I feel like this brown stuff is safer, as it's not super shiny and slippery.
I saw a very small set of a dish, dabber and dome..smaller and thinner than an ashtray... 675$!!!