How to seal log cabins

Written by helen harvey | 13/05/2017
How to seal log cabins
Log cabins require routine maintenance such as sealing and caulking. (log cabin image by Ray Kasprzak from

As log cabins adjust to their environment, it is normal for the logs to expand, contract, crack and split. Sealing and caulking cracks and gaps are part of the routine maintenance of a log cabin and help avoid water damage and infestations of insects and small animals.

Walk around the exterior of your log cabin and examine its condition. Use a stick of chalk to mark any gaps or cracks that are more than 1/4 inch wide, so that you can locate them easily when you make the repairs.

Load your reusable foam gun with a can of expanding foam sealant and squeeze the product into any gaps and cracks. There are many sealant products on the market that are suitable for this task. For example, PurFill Expanding Foam Sealant is a moisture-curing foam that expands in place to form a solid seal.

Use a piece of sandpaper to smooth off the sealant once it is completely dry.


If possible, apply sealant on a dry day.

Tips and warnings

  • If possible, apply sealant on a dry day.

Things you need

  • Chalk
  • PurFill Expanding Foam Sealant
  • Medium grade sandpaper

Show MoreHide

  • All types
  • Articles
  • Slideshows
  • Videos
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the site, you consent to the use of cookies. For more information, please see our Cookie policy.