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Hi All:

Need expert advice on what is the best log sealant to keep water from leaking through the logs ..  Thank you!  

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Good morning, Kim. 

There are lots of options out there for sealants made specifically for logs and I'll get to that in a second.

The bigger question: do you know where the leaks are coming from? Some are obvious (butt joints or the logs have just shrunk enough over time to show daylight between them - eek!). Others aren't so obvious (maybe via a check or crack in the logs themselves or in a corner, but showing up in the middle of the log). Be sure you know where those leaks are coming from first so you don't seal a bunch of places where the water isn't getting in.

We at Sashco make a couple of high-performance sealants made specifically for logs. One is called Conceal. It's lightly textured to mimic wood grain and comes in colors that match the most popular stain colors. We also make Log Builder, which is a traditional smooth sealant. It's available in three wood-toned colors. Both are highly elastic to move with the logs as they move with changes in humidity and weather and will do an excellent job sealing those leaks. I'd be happy to send you color charts and information on them. Shoot me your address and I'll be sure we get those out.

One final thing to consider: if your home is currently stained, you'll want to be sure that the stain on there now is chemically compatible with the sealant. Anything with lots of waxes and oils in it will prevent any sealant (our or anyone else's) from sticking to the wood. Let me know what the brand is and I will be able to tell you about compatibility.

Hope that helps for now! If you have more questions, feel free to respond here or reach out to me directly. I'm happy to be a resource to you.

Have a great week!

--- Charis w/ Sashco - cbabcock@sashco.com - 800-767-5656

Thank  you Charis:  We have several tubes of caulking that we haven't used yet.  We were told by a log home repairman that possibly our logs were absorbing water causing them to leak on the inside. We have caulked and caulked and caulked.  We have no stain on the logs,.. we used ferrous sulfate to preserve and gray out the wood. We have had the home for 12 years and no rot or decay anywhere on our logs. The ferrous sulfate also repels insects, such as wasps.. Anyway,.. don't need anymore caulk,.. was just trying to get opinions on how to find out where these leaks originate, . I appreciate your response.! 

That makes sense.

You might consider having a contractor come and do a thermographic survey of your home. This may help you pinpoint those specific areas that are causing the problems so you can deal with them directly, rather than more shooting in the dark. :-). If you let me know which state you're in, I'll give you some #s of contractors who do this kind of work on log homes.

-- Charis

Hi Kim,

Here's a link to our thoughts on repairing checks, if that is where the leaks are: https://www.permachink.com/resources/sealing-checks-in-log-siding

If the leaks are around window casements and such, here's a link to that page on our website: https://www.permachink.com/resources/log-gap-cap-and-energy-seal-to...

Finally, here's a link to our Sealants Application Guide, our general text to creating and maintaining good seals in logs: https://www.permachink.com/images/stories/catalog/sealants_guide.pdf

Please feel free to reach out to me should you have any questions!!

Brian with Perma-Chink Systems   brian@permachink.com  www.permachink.com

Thank you Brian,. will read each link to see what I can find out!  :-)

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