Excellent chemical resistance. Instant low pressure seal. Suitable for all metals. Medium-strength, general purpose thread sealant for sealing metal threads. Locks connection against vibration-induced loosening and other stresses. Easy to apply. Cures on active and inactive metals. NSF P1 Reg. No. 123001 DVGW Approval (EN 751-1): DVGW Reg. No. NG-5146CQ0312. 50 Milliliters.