Ranger-Dina Wakley Media Mediums Clear Gesso. Perfect for applying to surfaces where you want the background to show through, Media Clear Gesso provides tooth for paint to grab but allows any underlays to show. Great for sealing layers, Clear Gesso is ideal for making slippery surfaces more workable. This package one 4oz jar. Conforms to ASTM D 4236. Non-toxic. Acid free. Made in USA.