Rimobolan (ex. Primobolan Depot) 1ml (100 mg/ml) from Bayer Schering Pharma is a long-acting steroid, is a powerful androgenic steroid, the period of activity in the body is 2-3 weeks. With the help of this steroid, athletes build up solid muscle mass, which, of course, is accompanied by the accumulation of water in the body. On Rimobolan (ex. Primobolan Depot), muscles recover very quickly after heavy sets.