Has anyone ran this through to plug a leaky head or intake gasket?

How about as preventative? Mine aren't leaking but my truck has 160k on it and needs a new h2o pump. I'm wondering if a new pump and old gaskets might cause an issue. Would it be a good idea to run this stuff through to reinforce to old gaskets before they start leaking?

 

I personally would not use it till it is needed. I have used something like it and it does work. I was losing coolant and had to add some every 2 weeks or so. After adding one of the Barr's products, I haven't had to add any more.