Definition of "occlusive" []

• Occluding or tending to occlude. (adjective)
• Linguistics An oral or nasal stop. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "A comedone is a blackhead or whitehead plugging up a pore, and you certainly don’t want anything that can contribute to those namely, occlusive ingredients such as mineral oil, lanolin, or petrolatum."
• "The most commonly used active agent in many skin care products, after water, is the occlusive substance petrolatum or petrolatum by-products!"
• "It acts as an occlusive agent which prevents water from naturally leaving your body through your skin."