aptar stelmi announces a new addition to a novel range of coated stoppers called  premiumcoat &trade,  designed  for  the  protection  of  sensitive  and  highvalue  drugs, including biopharmaceuticals.sensitive and highvalue injectables are fragile by nature. therefore maintaining the integrity of the container closure while minimizing interaction between the drug compound and the component constituents is a challenge. the surface of the elastomer is coated during manufacturing with a thin fluoropolymer film. this coating acts as an effective barrier to many of the extractables and leachables that can be released from the elastomer and contaminate the drug.premiumcoat&trade is the first product in range of innovative solutions for highvalue injectable drugs.