Muscle Rub Ultra-Strength Cream, 4 oz, QC99719 Sale! This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Compare to the Active Ingredients in Bengay Ultra Strength. For the temporary relief of minor aches and pains of muscles and joints. Helps relieve pain associated with arthritis pain and backache. Deep penetrating pain relief.