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Question DetailsAsked on 9/22/2015

Will bondo putty hold a marble corner shelf on fiberglass corner

I have a fiberglass tub walls and I want to install a marble shelf in the corner. The area is 5/8 " along sides and 1" 5/8 in corner. The shelf is an 8"

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I would not count on it - and if it does not hold you have an ungodly mess where it was, plus maybe a cracked or chipped tub when it falls off. To have a prayer of working you have to sand through the gel coat on the fiberglass down into the actual fiberglass, so permanently and significantly damages the surround if you mess up in installation or it does not end up sticking well.


And note that the commercially available corner or shelf units invariably state NOT to use with fibearglass or acrylic surrounds - both because of the adhesion issue, and because those surrounds tend to move around a lot so the shelf will tend to crack loose.


I would recommend either having it permanently doweled into the studs (and tub and tile caulked of course since you will be penetrating the surround), stainless shelf bracket(s) screwed in and the marble shelf bonded to the top of that, or use a spring-loaded pole type shelf unit like this -


http://www.amazon.com/2132HB-Tension-...


Available in a variety of materials from plastic to marble, and do not permanent damage to tub/shower or ceiling (top should have soft rubber on it to avoid denting ceiling material). This is the solution I prefer because it does not penetrate the surround - and also hold a lot more containears than a single shelf.

Answered 4 years ago by LCD




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