SAFE-T-THERM® GRAS
SAFE-T-THERM® GRAS (Generally Recognized As Safe) by the FDA is designed for use in hydronic systems for freeze and corrosion protection. NSF approved as HT1, HT2, HTX1, and HTX2, it is used in systems where incidental food or potable contact is possible. SAFE-T-THERM® GRAS includes and orange dye for leak detection.