I will be traveling from the USA to India and while I've been home I bought some Thermal paste for my gaming computer back in my college in India. What is the protocol for getting this stuff through TSA? Do I have to check it in and declare it? Or can i simply put it in a plastic bag and stick it in my carry on? It is still in its original packaging if that matters at all. Any assistance on this would be greatly appreciated as I am leaving in 1 week. Thank you!