Duct seal

[linwue]

I was wondering if there is an alternative to duct seal when filling holes with cables, 600MCM in a 4” pvc conduit. Maybe a fire stop spray foam. Will it deteriorate the insulation on a THHN, XHHW

 

[texie]

I was wondering if there is an alternative to duct seal when filling holes with cables, 600MCM in a 4” pvc conduit. Maybe a fire stop spray foam. Will it deteriorate the insulation on a THHN, XHHW

Look here: https://www.polywater.com/product-category/polywater-sealants-selection/

 

[tom baker]

Any product for use in sealing cables, needs to be identified for the use, spray foam is not, the polywater is. See 300.5 (G) I have used the polywater, good clear instructions and it can be removed later, which I have done