Chimney Sealer : Water-Based Silane/Siloxane

[jimmyjabjames]

Well, it finally happened. After 19 months of waiting, my chimney top was rebuilt, reflashed with new lead, the clay liner was busted out, and an ICC ExceLiner was installed... by a WETT Certified mason.

So, after a lot of research, I'm protecting my investment.. At least I hope so..

I saw recommendations for Drylok 7 silane/siloxane sealer online and other similar products. $150 Canadian on Amazon because it's from the US. I found a Behr product at my local Home Depot for $50 CAD or so. It seems to be the same, but with 6% silane/siloxane rather than 7%.. i will not buy cheap if it means getting a low quality product.

Reviews for the product were mixed, but I think every one I found was for driveways. Several people did their second coat after it dried, which is a no-no.

Anyone have experience with this? It's supposed to penetrate the brick and mortar and crown, repelling water but allowing water vapor to escape.. not like silicone caulk and related products, though the element of "silicon" is in it.

I wish to have a stainless steel cap fabricated as well, as recommended by Chad Vaillancourt on YouTube..

 

[jimmyjabjames]

The internet tells me that these sealers are supposed to be good for up to 7 years.. The product:

https://www.homedepot.ca/product/behr-premium-concrete-masonry-protector-waterproofer-3-79l/1000430227?eid=PS_GO_140203__ALL_PLA-526641&eid=PS_GOOGLE_D24_Vendor-Funded_GGL_Shopping_BEHR-Paints_BEHR%20Products__PRODUCT_GROUP_pla-362320834276&pid=1000430227&store=7151&gclsrc=aw.ds&gad_source=1&gad_campaignid=21175429154&gbraid=0AAAAADhdmz4pwAtSf9Ra1ree2J9mNTQf6&gclid=CjwKCAjwv5zEBhBwEiwAOg2YKEhCJ3EfTK8UWzJUBrPSF8JZsHNxJK7GsuSxHnvUs0BPHOFWoe4q6xoCaL0QAvD_BwE

 

[bholler]

The internet tells me that these sealers are supposed to be good for up to 7 years.. The product:

https://www.homedepot.ca/product/behr-premium-concrete-masonry-protector-waterproofer-3-79l/1000430227?eid=PS_GO_140203__ALL_PLA-526641&eid=PS_GOOGLE_D24_Vendor-Funded_GGL_Shopping_BEHR-Paints_BEHR%20Products__PRODUCT_GROUP_pla-362320834276&pid=1000430227&store=7151&gclsrc=aw.ds&gad_source=1&gad_campaignid=21175429154&gbraid=0AAAAADhdmz4pwAtSf9Ra1ree2J9mNTQf6&gclid=CjwKCAjwv5zEBhBwEiwAOg2YKEhCJ3EfTK8UWzJUBrPSF8JZsHNxJK7GsuSxHnvUs0BPHOFWoe4q6xoCaL0QAvD_BwE

I absolutely never recommend sealers for masonry. If the masonry is done right there is absolutely no need

 

[jimmyjabjames]

I absolutely never recommend sealers for masonry. If the masonry is done right there is absolutely no need

Are you a mason? The mason who did the job also said i shouldn't need anything either, but he's in the business of repairing chimneys.. if you catch my drift.. I'd surely use it if it means I'm going to get more time out of it.. I'm on the east coast and we have major freeze/thaw fluctuations in winter.. rain one day then a 20 degree C drop the next.. like 50°F to 15°F in less than 12 hours several times per winter

 

[bholler]

Are you a mason? The mason who did the job also said i shouldn't need anything either, but he's in the business of repairing chimneys.. if you catch my drift.. I'd surely use it if it means I'm going to get more time out of it.. I'm on the east coast and we have major freeze/thaw fluctuations in winter.. rain one day then a 20 degree C drop the next.. like 50°F to 15°F in less than 12 hours several times per winter

I am a chimney sweep who does masonry on chimneys on the east coast. I regularly work on 100+ year old chimneys that were never sealed. So yeah not needed.