The chemical is absorbed into the masonry, where it cures to form a waterproof barrier.

The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone.

Páramo does not use any fluro-carbons, either as a DWR treatment or as a waterproof barrier.

The plugs were installed because the 1 and 9 tunnels run right up against the western wall of what is called the bathtub, the waterproof barrier that rings the World Trade Center basement to keep Hudson River water out and that is now threatened.

Even if a waterproof barrier were possible, the water would simply show up somewhere else - perhaps in the walls or in the next ceiling.

A groundsheet is used to provide a waterproof barrier between the ground and a sleeping bag.

These dead cells are interlaid with lipids secreted by the stratum granulosum just underneath, which help to make this layer of the skin a waterproof barrier.

The dam was the first in Britain to use chemical grouting to create a waterproof barrier below the embankment.

Upon leaving Caithness, he'd tugged a plaid from his pack and secured it tightly around Jillian's body, forming a nearly waterproof barrier between her and the elements.

Some physicians use a thick ointment to replace the waterproof barrier of the inflamed skin in the treatment of eczema, and a cream might not accomplish the same clinical intention.