An improved fibrinogen-based tissue sealing patch having a degradation time of less than two weeks is disclosed. The patch comprises a polyethylene glycol-caprolactone-lactide (PEG-CL-LA) triblock copolymer film in which the PEG-CL-LA units are preferably connected by urethane linkages and into a surface of which a fibrinogen-based sealant comprising less than 8 mg/cm2 fibrinogen and less than 10 IU/cm2 thrombin has been incorporated. In preferred embodiments, the polymer film comprises PEG having a molecular weight of between 3000 and 3500 and a CL:LA:PEG ratio of 34:2:1. Methods of production and use of the patch are also disclosed.