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(Unregistered Guest)
Unregistered guest
Posted on Tuesday, April 11, 2023 - 03:09 pm:   Edit PostDelete PostPrint Post

Reaching out to the hive mind to find out if anyone knows of a clear, Class A fire protective product that can be applied to an exterior CLT soffit (not exposed to the elements)?

Thanks!
Phil Kabza
Senior Member
Username: phil_kabza

Post Number: 754
Registered: 12-2002


Posted on Tuesday, April 11, 2023 - 03:39 pm:   Edit PostDelete PostPrint Post

Look at Flamestop.com, who offer several products indicated to provide a Class A flame spread and smoke developed rating to exterior lumber.

Have others had success with this or other similar products?
Phil Kabza FCSI CCS AIA
SpecGuy Specifications Consultants
www.SpecGuy.com
phil@specguy.com
Brian Payne
Senior Member
Username: brian_payne

Post Number: 305
Registered: 01-2014
Posted on Tuesday, April 11, 2023 - 03:48 pm:   Edit PostDelete PostPrint Post

Can't find specific flame spread info, but I recommend Sansin PC SDF Naturals Topcoat for Soffit locations.

Product Data says it is flame resistant, but doesn't say specific class.
Brian Payne
Senior Member
Username: brian_payne

Post Number: 306
Registered: 01-2014
Posted on Tuesday, April 11, 2023 - 03:51 pm:   Edit PostDelete PostPrint Post

Sansin Announces FireStop, “Class A” One-Coat Flame Spread Protection for Interior Wood Substrates

https://www.sansin.com/sansin-announces-firestop-class-a-one-coat-flame-spread-protection-for-interior-wood-substrates/
(Unregistered Guest)
Unregistered guest
Posted on Tuesday, April 11, 2023 - 04:59 pm:   Edit PostDelete PostPrint Post

Thanks! Looks like Flamestop has an exterior product, but not seeing where the Sansin Firestop products can be used in exterior applications.
ken hercenberg
Senior Member
Username: khercenberg

Post Number: 1561
Registered: 12-2006


Posted on Tuesday, April 11, 2023 - 07:41 pm:   Edit PostDelete PostPrint Post

I would presume there would be something here - https://www.4specs.com/s/09/09-9640.html


Maybe something like https://frctexas.com/exterior-fire-retardant-for-lumber-plywood/

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