Product Spotlight: SINK-NOT 350

June 15, 2020

Product Spotlight: SINK-NOT 350

The SINK-NOT 350 was created to perform as a final solution to sinking roofs in pontoons due to corrosion, rainfall, etc. The product is a void-filling, closed-cell polyurethane foam. While it stops roofs from sinking and leaking, it also stops vapor emissions, reduces fire threat, increases roof stability, and can be completed quickly.

Long-Lasting Durability

SINK-NOT 350 has been used in floatation services, lasting as long as 18 years with no failures in various media including the following:

  • Crude Oil
  • Gasoline
  • Water
  • Naphtha
  • Xylene
  • Jet Fuel
  • Diesel
  • Toluene

The foam can actually incorporate and “tie-up” small amounts of product leftover or residue. It will expand into the smallest holes and voids. Because of its product resistant properties, SINK-NOT 350 will seal the holes and voids, thus providing another layer of protection from future leaks and corrosion.

Safety & Installation

SINK-NOT 350 is hydrocarbon resistant, it will not sustain a flame. The closed-cell, chemical resistant foam prevents vapors from escaping into the atmosphere. Because it is a closed-cell foam, it can not be absorbed or dissolved by the media it contacts! 

To install, the foam is injected and allowed to rise in several continuous layers until the pontoon is completely filled. When full, any excess is trimmed from the manway. It is pumped directly from the drum, using an airless plural pump application. 


SINK-NOT 350 offers an excellent solution to leaking pontoons that can result in devastating and costly roof collapses while at the same time providing value-added corrosion protection and the ability to “tie up” existing residual media.