This is the oil i use to waterproof all my cups now!
I have spent many years testing different finishes out on cups and they all have their pros and cons. Linseed and Danish oil which i still use on my spoons also works on cups but can have a strong smell and taste which puts allot of users off understandably. Treatex hardwax oil in my opinion is the best thing i have found. It is heat resistant so good for hot drinks, dries quickly and has virtually no smell to it after a few drinks.
Brush on and leave for 5 minutes to soak in or before it starts going tacky then wipe off excess. 2 coats if the cup is for cold drinks only is plenty. For cups to hold hot drinks 3 coats.
This small bottle should do 2 cups with 3 coats each.
Whats in it?
Treatex Hardwax Oil ULTRA is manufactured on a base of natural sustainable raw materials: jojoba oil, linseed oil, sunflower oil, beeswax, candelilla wax and carnauba wax.