Previously — on multiple occasions — we have highlighted the growing list of naturally-occurring "bio-glues" that are being evaluated for various biomedical adhesive applications. See link.
More recently, highlighting a previously identified source, it was reported, "MIT researchers working to develop biomimetic medical adhesive" based on the structures inherent in gecko feet.
A wide range of materials are in use and in development for medical applications in adhesive, sealing, hemostasis and other wound management functions. See the press release from MedMarket Diligence (3/5/2012).