AMSilk completes preclinical screening of proprietary silicone breast implant coating New research paper about the coating of silicone implants with recombinant spider silk. AMSilk has completed preclinical tests of its proprietary silicone implant coating created from spider silk. AMSilk's coating includes a thin coating of spider silk proteins manufactured by AMSilk Click here . It modifies the implant, presenting a far more acceptable surface to the human tissue. The coating can be put on any silicone implant in the ultimate production step, before packaging and sterilization; it does not alter the mechanical functionality of the implant.