Astringedent Retraction Paste - Capsules, 25/Pk. Fast, convenient and effective solution for gingival retraction. The extra-fine tip delivers 15% aluminum chloride astringent retraction paste right into the sulcus, pushing the gingival tissue away from the tooth and allowing you to capture a detailed impression of the preparation margin. Unit-dose capsule fits most composite dispensers. 25 capsule refill