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Safe Sealant (1 Viewer)

sneezebeetle

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Hey all!

My hubby is busy gathering decor for new FW upgrade. Among those is a resin item he picked up from a garden center. The back has about a 1" section of exposed rebar that he needs to seal to make it safe for his tank. I seem to recall a foam sealer that folks used when building their back wall "rock walls". Does anyone happen to recall what it is or have another suggestion as to what he can use?
 

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