HDSE is a high-density two-part silicone elastomer developed and manufactured exclusively by PCI-Promatec.  Primarily developed as a fire sealant capable of providing a high degree of gamma radiation shielding, HDSE is supplied at a minimum density of 147 FT³.  HDSE is also an excellent flood seal material (up to 40 psi pressure - CTP-1081).  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 surface that is easy to decontaminate. 

Radiation Resistance
HDSE has been subjected to substantial radiation exposure levels (5 x 10⁷ 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 depth as little as 8” is all that is required for a 3-hour fire rating. 

Reparability
HDSE 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 HDSE material can then be applied to previously cured material to become an integral matrix with the already installed HDSE.

Packaging
HDSE is supplied in 150 lb. sets consisting of two six-gallon containers, yielding approximately 1 cubic foot of cured material.

Cure Time
Cure time for the HDSE can be varied from 10 minutes to 4 hours.  Custom cure times can be requested.