Featuring Tecnu Products for the relief of Poison Ivy, Poison Oak, Poison Sumac

Ivy Block® Lotion by EnviroDerm

Poison Ivy Block or Barrier skin lotion to help prevent Poison Ivy, Oak & Sumac Rash.

Only IvyBlock® can prevent Poison Ivy rash and is FDA approved.

When applied to the skin prior to contact, the active ingredient in IvyBlock®, bentoquatam, serves as a barrier that blocks the allergenic oil (urushiol) in these poisonous plants from reaching the skin and starting the development of the rash.


IvyBlock®, a powerful barrier cream, is applied to the skin before risk of exposure. It should be applied to clean, dry skin at least 15 minutes before exposure risk. Re-application is recommended after 4 hours to maintain the maximum level of protection. Emergency workers who do not wash off IvyBlock do not need to reapply if it is inconvenient.

IvyBlock® is very safe and should not irritate the skin. Tests show IvyBlock® is non-irritating and non-sensitizing (non-allergenic). As with any product, individuals should read the directions and ingredients before use. Do not use if you react to any of the ingredients.

Poison ivy rash is not seasonal. Urushiol, the allergenic substance that causes poison ivy, oak, and sumac rashes, is a very stable chemical and can cause a reaction even during the cold weather months. Poison plants contain urushiol throughout the year and the oil is potent in all seasons. Use of IvyBlock® can be beneficial all year long, especially for very sensitive individuals.

Even if wear gloves or protective clothing, apply IvyBlock® to skin areas at risk of exposure. This includes secondary contact areas, which can result from transfer of the oil from contaminated clothing, shoes/boots, tools, and pets. For maximize protection, apply IvyBlock® to arms, hands, and legs even when protective clothing is worn.

IvyBlock® should be applied every four hours to maintain the maximum level of protection. Emergency workers who do not wash off IvyBlock® do not need to reapply if it is inconvenient.

After IvyBlock® lotion dries, the skin will feel natural. The lotion is non-greasy and will not adversely affect the normal skin properties. A faint white coating on the skin will be observed on some people when the lotion dries.

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