I think the plumbers tape is called silicone tape-my hub has used it around the house. As for leakage -I just hosted a swap and some sprays were sent- one package had 3 completely empty bottles due to leakage. Side note to the swap-I just found out that you are not allowed to USPS any perfumes, mouthwash, hairspray, after shaves etc. I really never knew this before.:undecided I've sent perfume as gifts for years.