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PSI-601/601FG One-part Acetoxy Silicone Sealant

Technical Data

PSI-601 is an excellent general-purpose RTV sealant. This moisture-curing sealant forms a durable, flexible, long-lasting rubber seal resistant to the effects of sunlight, rain, snow, ozone and ultraviolet radiation. It withstands temperature extremes higher than standard silicones and most other sealants.

PSI-601 has excellent adhesion to glass, metal, ceramic, porcelain, many plastics, and painted surfaces. PSI-601 FG is for food-area use. PSI-601 is not intended for structural applications.

         •   Highly flexible over a wide range of temperatures.
         •   UV and ozone-resistant.

Excellent adhesion and superior durability on most non-porous surfaces.

         •   Capable of compensating for joint movement of ±25% of original joint geometry.

Both PSI-601 and PSI-601 FG comply with MIL-A-46106.


PSI-601 FG (Clear only) complies with FDA 177.2600.

         •   PSI-601-FG is listed under NSF/ANSI Standard 51.

Typical applications:

Butt and lap shear joints, curtain wall joints, glass partitions and glass blocks.

         •   Cap, head and toe bead in conventional glazing.
         •   Stopless glazing.

Solar panels, skylights and mullions.


Perimeter caulk metal and most plastic frames.

         •   Seal ductwork, vents and air conditioning units.
         •   PSI-601-FG: plastics, materials and components used in food equipment.