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Question:

What can I use to glue James Hardie fiber cement trim boards?

Will Titebond II (weatherproof) work? I have a 1928 home and am trying to duplicate one of the original exterior window sills to go on a new window. I need to glue a couple of 5/4 pieces together to get the right thickness and I want it to last. The originals have redwood but it's old growth I believe and more stable than what I can find now in redwood or DF. Correct me if I'm wrong there. Plus I have only two attaching points to work with on either side of the window so I chose the fiber cement product for it's stability. Nothing on James Hardie's site says what can be used to glue it with though.ThanksThanksChris

Answer:

I would use gorilla glue which is 100 percent waterproof. or you could use polyurethane caulk which is very tough.
May 11, 2017

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