The objective of this experiment was to evaluate the efficacy of 4 different silo plastics to mitigate silage surface spoilage. Bag silos (60 cm × 30 cm) were created by heat-sealing single layers of 4 different types of silo plastics: black and white plastic (BW, KSI Supply Inc., Sheboygan Falls, WI), Silostop oxygen barrier plastic (SS, Bruno Rimini Ltd., London, United Kingdom), KSI oxygen barrier plastic (KSI), and Hitec oxygen barrier plastic (HT, Shanghai Hitec Plastics Co. Ltd., Shanghai, China). There were 5 silos per each types of plastic, yielding 20 experimental silos. Approximately 2.75 kg of chopped whole plant corn (40.9% DM) were placed in each silo, manually compressed and sealed. One sample per plastic type was analyzed for oxygen transfer rate (OTR). Silages were stored for 112 d at 15–21°C and data were analyzed using the Fit Model procedure of JMP. Means were compared using the Tukey’s test. Relationships were evaluated between OTR and fermentation parameters. The OTR for BW, KSI, SS and HT were 4039, 154, 23.2 and 8769 cc/m²/d, respectively. Dry matter, CP, soluble CP, NH₃-N, and water-soluble carbohydrates of corn silage were not affected by plastic type (P > 0.05). Silages ensiled with HT had a lower DM recovery, higher pH, less lactic and acetic acids, and less ethanol, as compared with silages stored in BW, SS or KSI (P < 0.05). Aerobic stability was lowest for silages ensiled within HT (8 h), intermediate for BW (37 h) and greatest for KSI (76 h) and SS (67 h) (P < 0.05). Colony forming units of yeasts for KSI, SS, BW and HT were 3.94, 4.56, 6.19, and 8.05, respectively. Relationships between OTR and fermentation parameters indicated that as OTR increased, corn silage was less stable, had a higher pH, more yeasts, ethanol, and a lower lactic-to-acetic ratio (P < 0.05). Results indicate that ensiling corn silage with differing “oxygen barrier” plastics results in large differences in silage quality.