Dencorub Extra Strength Heat Gel's concentrated hot formula provides fast temporary pain relief from sprains, strains, painful joints, muscular aches and pains, Arthritis, Rheumatism, Lumbago and Fibrositis. Fast Acting. Concentrated. Penetrating. Non-greasy. Clear gel.Apply Dencorub Extra Strength Heat Gel before and after exercise to soothe painful muscles and to assist with your stretching routines and recovery.