Most Recent UPDATE
My aim is to compile a list of juice and flavorings that may cause problems as far as cracking, fogging, or etching polycarbonate tanks. Anything listed here may cause your polycarbonate tank to be damaged. I am primarily focused on the polycarbonate tanks, although this info may apply to other tanks.
I am certainly not attempting to ban any flavors or ejuices. I'm just trying to help out some folks who continue use polycarbonate tank systems.
***Most, if not all, polycarbonate plastic by nature uses BPA in its manufacturing You can read about BPA leaching from plastics. Just google BPA. IMHO, it's just another good reason to move away from polycarbonate material.
Polypropylene is my personal choice for tank tubing because it it inexpensive and durable. This is the same material that is used to make syringes. Polypropylene tubing can be purchased here: McMaster-Carr. You can use 5/8"id x 3/4od for Liquinator tanks, Lil mama tanks, Big daddy tanks, Jtanks, and others. This tubing has a very slight curve to it, but will not be noticeable when cut to a short length. You can see a pic of a tank I made using this tubing with Liquinator endcaps here: Here's a pic of my polypropylene tank
The popular DCTanks can now be found made from polypropylene tubing. Polypropylene will not crack from a chemical reaction from using juices on this list. For some reason, most vendors are not stating the fact that these are made from polypropylene. IMO this is an excellent selling point that they are missing... These tanks can be used with some XL cartos, or they can be easily cut down to fit a standard sized carto, my personal preference, since I have a few dozen tanks, and I can't afford the pricier ones.
Glass tanks are also a wonderful alternative.
I am personally not familiar with the Vision Stardust type tanks or any of the clearomizer types. From what I hear, they are polycarbonate and folks seem to be having the same issues with cracking/frosting. I am also not familiar personally with Vivi Nova's, since I have found my happy place with polypropylene DCTanks.
All of the ejuice/flavors listed below have been reported by at least one ecf member to cause problems for them. YMMV.
Some of these are premixed juices, some are flavorings that DIY'ers use. Contributions have been made by myself and other members. So far we have:
Here is the list. Everything listed here has caused someone a problem with a polycarbonate tank. Some have reported no issues whatsoever with some of these juices/flavorings. Use at your own risk with polycarbonate tanks.
Alien Vision Cravelope
Alien Vision Pineapple Pulp
Cinnamon like "atomic cinnamon" types, not warm cinnamon like cinnamon coffee cake, this is okay
Cola(because of cinnamon)?
Decadent Vapors Bubblegum
Dekang Pina Colada/Tobacco mixed
DIY Flavorshack Tangerine
DIY Gummibear(melted plastic endcaps on DCTank).
E liquids that contain triacetin, used in vg liquids to carry flavor more effectively
Ecblends Apple Pie
Ecblends Cinnamon Apple
ECBlends Gingerbread, double flavor
Elixirliquids Cinnamon Death
Elixirliquids Deathday Cake
Elixirliquids Heaven and Hell(cinnamon with menhtol)
Elixirliquids Rage(hot cinnamon)
FA Lemon Sicily Flavoring
Flavor West Ecto Cooler at 12% with 5% TPA Hawaiin Punch(diy mixture)
Flavor West Mojito Flavoring
Fuzion Vapor Gumby's Blood
HellaVapor's Raspberry Winta-green
High Brow Vapes Orange De Sangre(peeling on inside of tank)
High Desert Vapes Ecto Cooler
High Desert Vapes Applewood Tobacco
KBV Hummingbird Nectar
Lorann Butter Rum flavor
Lorann Butterscotch Flavoring
Lorann Horehound Flavoring
Lorann Peppermint oil
Mad Murdock's Radiator Pluid
MadVapes Black Licorice
Mimosa(because of the orange)
Mountain Oak Vapors Red Drop
Mrs. T's Apple Crumble
Mrs. T's Apple Pie with Ice Cream
Mrs. T's Kickin' Pineapple
Mrs. T's Snickerdoodle
Mrs. T's Strawberry Lemonade
Mrs. T's Strawberry Shortcake
Mt. Baker Vapor Arnold Palmer
Mt. Vapor Cola
Mt. Baker Vapor Cream Soda
Mt. Baker Vapor Marachino Cherry
Mt. Baker Strawberry Lemonade
Mt. Baker Vapor says not to use their Amaretto, Cinnamon, Citrus flavors, Mt. Dew, Sweet Tarts, Green Apple, Ginger, and Lavender in plastic tanks
Mt. Dew flavoring
Mt. Vapor's Lemonade(endcaps melted)
My Vape Store Cinnabun
Neon Vapors Neon Cherry
Oil based/e liquid that conains essential oils, when mixed with.pg/vg, creates esters which will crack plastics
Rawrvapor Hawaii Sunrise
Smokeless Image Banana Nut Bread Liquid from From Smokeless image
Tasty Vapor Atomic Cinnicide
Tasty Vapor Cherry Cola
Tasty Vapor Sherbet
Timmy's Double Double from Juicy Clear
TPA Blueberry Candy(melted plastic endcaps on DCTank)
TPA Blueberry(melted plastic endcaps on DCTank)
TPA Cherry Blossom flavoring
TPA Cinnamon Danish flavoring
TPA Earl Gray Tea flavoring
TPA Holiday Spice flavoring
TPA Honeysuckle flavoring
TPA Lemon Lime flavoring
TPA Maraschino Cherry flavoring
TPA Pineapple flavoring
TPA Ripe Banana flavoring
TPA Rootbeer Flavoring
TPA RY4 Double Flavoring
TPA Spearmint flavoring
TPA Vanilla Bean Ice Cream flavoring
TPA Vanilla Custard flavoring
V4L WOW Peppermint Nobacco
Vapalicious Gooey Butter Cake.
Vape Dude's Lemonade
VaporGod Black Cherry
Vapor Renu Cherry Crush
Vapor Renu Marlboro, Lavender, Pink Lemonade
Vapor Renu Mt. Dew Baha Blast and Strawberry Limeade
Vapor Renu Mt Dew Code Red
Vapor Renu Teaberry, Cherry Vanilla (possibly most of their flavors)
Vaporbomb Fire 'n Ice(cracked tank, melted rubber drip tip)
Vaporbomb Green Apple
Vaporbomb Hot Cinnamon Candy
Vaporbomb Sun Kissed
Vaporbomb Sweet Cherry
Vaporbomb Sweet Cinnamon Red Hots
Vapor Room Cinnamon Red Hots
Virgin Vapor Luscious Lime
Virgin Vapor Sweet Summer Lemonade
Vixen Vapor RH Candy Cane
Vixen Vapor Rootbeer
Wintergreen juice or flavoring
This list was reported on the thread. I'm not sure if it's Flavor Art or Flavor West, but the following e liquids may break your plastic tank based system.
Big Red Soda
Cinnamon Hot Tamale
Cinnamon Red Hot
Creme De Menthe
Ruby Red Grapefruit
Perfumer's Apprentice lists triactetin as in ingredient in some of their flavors, so be sure to check that out. Triacetin has caused problems for many members.
Disclaimer: These are not "bad" juices. They just have the potential to cause cracking in tank systems using polycarbonate tubing.
Thanks to ECF Veteran member Stosh for alphabetizing it for me.