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Best sealant for a metal chimney?

Hi,

I have a metal chimney passing up through a metal roof with a what what appears to a

EPDM Rooftites type product fitted and sealed. The sealant looks like it needs replacing, what sealant/silcone products are best to use in this application?

Cheers,

Brent.

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Comments

JacobZ

Hi @brent22,

For this application, I would suggest using Sikaflex 11FC Purform. It is a high-quality, general-use sealant that is designed for use in exterior applications that experience harsh weather conditions.

Before application, make sure you give the surfaces that require sealing a good clean to remove any dirt or grime that could affect adhesion. Warm water and dish soap with a scrubbing brush will do the trick.

Let me know what you think and if you have further questions, please don't hesitate to ask.

Jacob

R4addZ

https://www.workshop.bunnings.com.au/discussion/comment/55971#Comment_55971

Hi @brent22

Will the sealant actually contact the chimney or the surrounding plate because if it comes into contact with the actual chimney, it needs to be fire rated.

I had a pot belly stove some years ago and have seen the chimney glow red with the heat and unless the sealant is appropriately rated, you could br creating a fire hazzard. Maybe use something like this...

https://www.bunnings.com.au/sikaflex-600ml-grey-400-fire-polyurethane-sealant_p0036456?store=2016&gclsrc=aw.ds&gad_source=1&gad_campaignid=21119565770&gbraid=0AAAAADtbEB9RWybcc5zrAVveQrzTReWr9&gclid=Cj0KCQjw2IDFBhDCARIsABDKOJ5150xAGUpdoHFcHutJTWVDdDRsAvGN6zPKX6nzA2ImKUr6ybjTg5caAnoGEALw_wcB

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