BK-7 Matching Liquid, nD=1.52 optical gel. It is used as an optical couplant to reduce or eliminate reflection losses. It is incompatible with Acrylic at high temperatures. It is opalescent or translucent and clear in thin layers and can be used in a wide temperature range. Its freezing point is <-45oC and its boiling point is >370oC.
Packaged in 30ml bottles (1floz)