Abstract: A device and method to aid in male potency by producing and maintaining an erection by means of using a vacuum device with inflatable sliding seals to establish and maintain a vacuum, providing the operator time to install a retaining device on his penis in an area of his choice. The sliding inflatable seals preclude the necessity of creating a vacuum seal against the groin area with its ensuing problems of scrotum and abdominal tissue ingestion. The Restrictor Seal incorporates differential pressure pad areas to selectively place pressure on specific areas of the penis to optimize incoming blood flow and restrict outgoing blood flow required to maintain the erection, by means of which erections can be maintained longer, and with less opportunity of a degraded thermal loss of the penis. Seminal ejaculation is effected by means of a urethra relief groove. The deflation of the seals in the device create a means of easy removal of the device from the penis without pain or discomfort or penile tissue damage.