40001 Wood Restore Liquid Hardener - 1 Pint

this works great.

This product is extremely handy when you have storm damage in your attic. It's also handy for wooden window sills or dormers, where cooling water has caused severe softening. This stuff penetrates deep into softened damaged wood and makes it Rock Solid again. That allows you to use filler and waterproofing materials rather than rip out all of the wood and start over.

This worked like magic. I used it on the somewhat rotten wood then filled it with putty and painted the wood. It saved the fence and saved a lot of money.

Worked great on my barn door. Really happy with the results.

I wasn't convinced this could do the job, but I was happily surprised. Worked great on the wood rot on my railing. It was a two by four, and it had rotted out because of what must have been a split in the wood and a hard working carpenter bee. It made the wood hard enough, with several coats, so that it would accommodate these various wood screws (see pic). I think it created a great base for the wood putty as well. Remember, the first few coats will take longer to penetrate and dry, after that, it goes pretty fast. Took eight coats, but it did the job. Also, a little goes a long way. I almost have a full bottle left. Should be sufficient for any project. It's a buy.