Plaster: Old-Wall Help

Reviewed by:
Rosemary Thornton
Old walls sometimes require a little extra help to hang onto new plaster. Plaster-Weld is a liquid bonding agent that can be applied (like paint) to any sound interior wall.

It can be used over cement, mortar, metal, silicone, wallpaper or painted surface. Coverage is about 300 square feet per gallon.

Depending on substrate material, one to three coats will be required.

  • A five-gallon bucket of Plaster Weld is priced under $150 (November 2006).
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