Loctite 55 pipe sealing cord loctite 55 loctite 55 has been designed to lock and seal metal and plastic pipes and fittings it needs no time to cure and results in an immediate full pressure seal loctite 55 is the ideal choice for a quick easy and reliable seal it has approvals for gas and potable water and is certified to nsfansi standard 61 loctite 55 pipe sealing cord 50m