Waterproofing n. : The act or process of making waterproof.

Waterproofing n. : Same as Waterproof, n., 1.

Example:
What is a good Waterproofing product for cedar spa skirting?

Taxonomy
Waterproofing, waterproof, concrete, coatings, waterproofing systems, water passage, membranes, free encyclopedia, Basement Waterproofing, application, waterproof membranes, basement, water-resistant, waterproofing materials, barrier, hydrophilic, hydrophobic, basement waterproofing systems.

Defination from the web:
waterproofing involves 'membranes' ... Various basement waterproofing systems address these problems. ... Basement waterproofing may be done internally and externally. ...