Medium-Density Silicone Elastomer
LDSE is an elastomer-based product developed and marketed by PCI-Promatec. LDSE is typically supplied as a two-part set of A and B liquid components. The A and B liquids are black and off-white, respectively, for easy identification and inspection of complete mixing. Installed by hand or machine, thorough mixing of the components in a 1:1 ratio yields a high dielectric liquid, that cures into a light weight, firm elastomer at room temperature, low in halogens, with no off-gassing or other by-products. Since it is installed as a liquid, a complete fill in and around penetrating elements is ensured. Cured, it exhibits a durable, damage-resistant exterior surface that is easy to decontaminate.

Fire Qualification
Numerous successful full-scale fire tests have been performed at nationally recognized laboratories for various seal configurations including electrical and mechanical items in large, complex openings. Designs have been qualified for a three-hour fire resistance at a 6” depth without, and lesser depths with, permanent damming.

Pressure Testing
Configurations have been qualified for up to 20-psi pressure resistance with zero leakage at a four-inch depth.

Radiation Resistance
LDSE has undergone 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.

Reparability
LDSE can be selectively removed with relative ease using blunt non-conductive tools and devices. With minor preparation, newly installed LDSE material becomes integral with existing LDSE.

Cure Time
The cure time for the LDSE can be as little as 10 minutes, or as long as 8 hours. Custom cure times can be requested.

Packaging
LDSE is supplied in 60 lb. sets consisting of two five-gallon containers, yielding approximately 1. cubic foot of cured material.