Hernon Mfg. Formulations Receive NSF Approval for Drinking Water

NSF has certified that more Hernon products conform to the requirements of NSF/ANSI Standard 61

Hernon Mfg. recently received notification that six more products have received NSF Intl. approval for drinking water. These products were certified in addition to the five Cylinlock formulations Hernon also announced recently.

NSF certified that the following products conform to the requirements of NSF/ANSI Standard 61 — Drinking Water System Components — Health Effects:


Hernon Porosity Sealant 990 (HPS 990) is a solution for leak proofing of parts. It offers improved machinability and surface quality for painting and plating. The hardened resins exhibit superior chemical resistance and elevated temperature stability. It is an anaerobic-cure polymer impregnation resin. HPS 990 cures once it reaches the inner porosity of metal components. HPS 990 is certified to ANSI/NSF Standard 61 for use in commercial and residential potable water systems not exceeding 180°F. This product was certified for a maximum surface-area-to-volume ratio of 50 sq in. per liter. It also was certified for brass materials having no greater than 12% porosity.

Thread Compounds

Dripstop 923 is specially formulated for use on tapered threads and provides a lower break-loose torque than Dripstop 940. Tapered threads “cone” together, so Dripstop 923 is formulated for easier disassembly. It delivers temperature integrity to 300°F continuous, and intermittent exposures to 375°F are tolerated.

Hernon Self Seeler 604 and Self Seeler 618 are essentially the same with the exception of color. White is chosen for a pipe sealant look, and orange selected for an obvious indication of the presence of the special coating. The difference is strictly cosmetic. With the low-viscosity grades, parts can be effectively tumbled with the Self Seeler as a simple means of coating the threads. Similarly, parts can be placed into plastic bags and shaken to apply the coating. Low-viscosity types can be hand applied and brushed onto the thread path.

Hernon Self Seeler 615 is a high-viscosity, non-hardening, threaded pipe sealant. The preapplied application is suited for production environments. When it dries it becomes a resilient sealant for tapered or straight threads. Threaded components can be loosened and tightened up to eight times without recoating.

Hernon Manufacturing

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7000 Dutton Industrial Dr
Dutton, Michigan 49316