Syntactic Void-Filler Kits

Specially engineered syntactic formulated to serve as a void filler for subsea applications. The material is provided as a multiple-part kit that is mixed and poured into any free-flood cavity or void. These kits may be cast directly by the customer or by trained ESS personnel.

ESS provided kits have been used in Puget Sound Naval Shipyard, Portsmouth Naval Shipyard and the shipyard at the Point Loma Naval Base. ESS has also performed on-site syntactic installation at Point Loma, Norfolk Naval Shipyard, Northrop Grumman Newport News, Puget Sound Naval Shipyard and at the Subsea Naval Base in Groton.

• SF-38 (pdf)
  This three-part kit provides 28 pounds of salt-water buoyancy per cubic foot at operating depths to 4,000 feet. This easy-to-use epoxy system may be cast into any free flood cavity without sophisticated equipment. This formulation has become the Navy standard for void spaces.
• SF-32 (pdf)
  A lower density version of the standard three-part kit, this formulation can be used down to 3,000 feet with an added 6 pounds of buoyancy per cubic foot. It is similarly trouble-free in the casting process for customer convenience.
• SF-25 (pdf)
  This low-density four-part kit must be processed on site by ESS technicians in order to ensure proper performance. Designed for repeated excursions to 1,000 psi, (2,270 feet), the system uses a combination of microsphere and macrosphere technology to obtain its low density.
• SF-22 (pdf)
  Another low-density four-part kit, this system is built for repeated excursions to 620 psi, (1,400 feet). The syntactic also uses a combination of microsphere and macrosphere technology to obtain its low density and must therefore be processed on site by ESS technicians or by experienced shipyard personnel.
• PSF-42 (pdf)
  This is a polyester based syntactic specified in several Navy applications where ease of use rather than low density is the critical factor. ESS personnel perform the casting of this multi-component system.