Patented SILVEX Nano Silver Gel – 0.5 Fl Oz. Experience theNEW SILVER STANDARD in wound care with our easy-to-apply SILVEX Nano Silver Gel. Why Choose SILVEX Nano Silver Gel?. Expiration Date: 2025-10-01 Unit Quantity: 1 Material: Water-based Hydrogel,Water,Nano Silver Features: Hypoallergenic,Water Resistant,Non-toxic.