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Jin
Use grace ice water shield over existing wet pitch
Jin

I have a flat roof, there are chimneys. Over the past 3 years I have been using wet pitch to fill the cracks of roof around the chimney.  I am wondering if I could use a round piece of grace ice water shield on top of existing pitch. I am not planning to cover the entire roof with ice water shield. Since other part are covered by gravel roofing. 

1. Is it ok to use grace ice and water shield on existing pitch? 

2. If not, what would be the right way to fix roofing.  

Thanks in advance! 

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