Onyx is a viscous 40% phosphoric acid etchant that stays where you place it, does not run and rinses away cleanly and completely. The high-contrast black gel makes it easier to see where you have etched, and where you haven’t. Use with any bonding system or technique that requires etching: selective etch or total etch. Made in the USA.
Highest strength, most effective etchant
Black silicon carbide particles provide the greatest contrast, making it easy to rinse away completely
No dye – no chance of staining porous surfaces
Particles can be agitated on tooth to mechanically scrub and clean the surface