Rectorseal NOKORODE® Regular Paste Flux will not freeze or decompose. No odor. Lead free. Recommended for use on all solder alloys including 95/5 and all lead free solders. Meets Specification O-F-506, Type 1A and A-A-51145, MIL-F-4995-2. Certified to NSF/ANSI Standard 61, Annex G