Quote Originally Posted by bobbypump View Post
Just curious.. I have been in situations where preloading would help me out, however, I was under the impression that the gear will slowly "melt" the rubber stopper. Is this just bro science?
The possibility of gear melting the plunger definitely isn't brother science.

The problem comes form UGLs using EO (Ethyl Oleate) to reduce the amount of PIP.

EO is used as a solvent in some pharmaceuticals but also as a plasticizer in polymer molding.

If you have pharmacy grad gear I doubt you have anything to worry about when preloading syringes.

If your gear is UGL then I would do a test syringe several days before your trip.

If the plunger doesn't begin to dissolve within the first 10-15 minutes than your gear is likely EO free.

I've experienced this first hand, my thread is attached below.

test p melting nipro syringe plunger