Symmons 0.563 Ptfe Foam String Replacement Gasket Symmons Temptrol T-27 Escutcheon in the Washers, Gaskets & Bonnet Packing department at Lowes.com
plumbing - How do I seal my shower escutcheon plate to prevent it from leaking? - Home Improvement Stack Exchange
Sioux Chief 972-100 Chrome Plated Brass Tub Escutcheon with Foam Gasket - Noel's Plumbing Supply
Shower Arm Escutcheon Plate, Rubber Gasket Decorative Large Diameter Stainless Steel G1/2in Large Shower Arm Flange for Replacement (Brushed) - Amazon.com
ROHL 1303-0538 ADHESIVE GASKET ONLY IN WHITE FOAM FOR BACK OF COVER PLATE TO PRESSURE
1 Pack Metal Tub Spout Cover Ring, Chrome Bathroom Faucet Remodeling Wall Plate with 1 Pcs Foam Gasket, 1-1/2 Inch ID and 3-5/8 Inch OD - Amazon.com
1 Pack Metal Tub Spout Cover Ring, Brushed Nickel Bathroom Faucet Remodeling Wall Plate with Foam Gasket, 1-1/2 Inch ID and 3-5/8 Inch OD: Amazon.com: Tools & Home Improvement