NUPROL DC has been specifically designed to treat Airsoft Replicas post-game-day. With powerful degreasing/ cleaning properties, NUPROL DC will get into all those hard to reach areas so you can sit back and watch the dirt & grease run off your replica. Due to its unique formulation, NUPROL DC will not degrade rubber O-Rings within your replica. For best results, use NUPROL Silicone Spray after to re-lubricate your replica.