SF-150NH is a high-density two-part silicone elastomer, originally available from Brand Insulation Services (BISCO), now manufactured exclusively by PCI-Promatec. The SF-150NH provides a high degree of gamma radiation shielding, supplied at a minimum density of 147 FT³. SF-150NH is also an excellent flood seal material (up to 40 psi pressure - Ref M-179) Further, relative to other sealants, this material acts as a heat sink, (thereby reducing the concern for cable derating). Installed as a liquid, by hand or machine this ensures a complete fill in and around penetrating elements. Cured, it exhibits a durable, damage-resistant exterior rated excellent for decontaminability.

Radiation Resistance
SF-150NH has been subjected to substantial radiation exposure levels (1 x 108 Rads Gamma) with no significant changes reported to the material’s physical properties. Base material has undergone exposures as high as 7.13 x 108.

Fire Qualification
Successful full-scale fire testing has been performed for a variety of design configurations at nationally recognized laboratories, to numerous standards. A 12” depth is all that is required for a 3-hour fire rating.

Reparability
SF-150NH can be selectively removed with relative ease using blunt non-conductive tools and devices. Additions or deletions of elements can be easily accomplished, and new SF-150NH material can then be applied to previously cured material to become an integral matrix with the already installed SF-150NH.

Packaging
SF-150NH is supplied in 100 lb. sets consisting of one five & one six-gallon container, yielding approximately 0.66 cubic foot of cured material.

Cure Time
Cure time for the SF-150NH is approximately 8 hours.