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By itself, glass is in fact always breakable. Glass, by its definition is made out of materials that can at least crack. The only exception to this is when a hybrid material is made such as plexi-glass. This type of material can in fact be unbreakable, but it is not considered glass.nswer by Desine (427). There is no unbreakable anything. Under sufficient stress, anything can break. Glass is made safer not by making it unbreakable but by making it break into safer pieces.
Helioseal Clear Chroma Sealant (Project 01-59) (05/02) Helioseal Clear Chroma is a new product described by its manufacturer as a transparent fissure sealant with reversible color change. The unfilled sealant uses a photochromic dye that produces a reversible color change to enhance visualization during recall appointments. After being placed and light cured for 20 seconds, the sealant is reported to