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Cargille Optical Gel, Code 0608, 1 oz.:
Comparing the different products:
Optical Gel Codes 0607 and 0608 are optically and chemically nearly identical, and both are used for coupling optical fibers and other optical components, and for mode stripping. Optical Gel Code 0607 is a thinner gel than 0608 and, upon standing, the surface of 0607 is a thinner gel than 0608 and the surface of 0607 will normally appear to be fluid. Code 0608 appears to be much less fluid.
Optical Gel Code 0607, although not water soluble, is made to "disperse" when immersed in water to facilitate cleaning.
Optical Gel Code 0608 was specially made not to "disperse" in water, for applications where water immersion without dispersing or changing is required.