Silverline® Antimicrobial Peritoneal Shunt Catheter Silverline® Peritoneal Shunt Catheters are indicated to be used in all patients with an indication for internal CSF-drainage. Silverline® Peritoneal Shunt Catheters are made of antimicrobial radiopaque implant grade silicone. They are coated with a layer of pure silicone, to prevent calcification due to micro-cracks caused by the barium sulfate filler. Silverline® Peritoneal Shunt Catheters are compatible with all manufacturers´ shunt valves.