S5511110 / 11110 IVY BLOCK 1OZ PROTECTIVE CREAM IvyBlock® System The IvyBlock® System offers relief at any point of contact with poison ivy, poison oak or poison sumac. IvyBlock® Protective Cream is the only cream proven to protect and approved for marketing by the FDA for this purpose. Use before potential contact with poison ivy, oak or sumac. After contact, easy-to-use IvyCleanse™ Towelettes remove urushoil, which causes the allergic reaction. Use on skin, clothes, tools or sports equipment. If a reaction does occur, IvySoothe™ Cream provides relief with a blend of 1% hydrocortisone and aloe vera. It also eases the discomfort of eczema, dermatitis, psoriasis and insect bites.