I have been using Perma-Chink products on my century old log cabins and on my newly constructed cabins for 20 years. I cannot say enough about it. The product holds up for what seems forever, and mice and squirrels detest it. The seal the chinking creates has made my old drafty cabins as tight as new ones, making them easy to heat during cold Maine winters.
I use the Log Boss screws for attaching logs when I build with vertical logs. I have also been happy with the Ultra-7 stain and Advance topcoat. All-in-all, great products from a great company!
Libby Camps and Outposts