Silica and glycerin-free. Acid Etch® creates a deeper etch pattern for easier application of bonding materials. For increased patient comfort and easy clean-up, Acid Etch® is highly viscous, allowing for more accurate placement on enamel or dentin. Material will not slump, slide or run. Easily placed and controlled consistency. Acid Etch® is odorless and tasteless, and available in a 35% concentration. Now in transparent aqua blue. A true benefit to your practice.