When other chinking pulls away, Log Jam® holds its seal.

Synthetic mortar chinking for your log cabin or log home

Log Jam®


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  • Stretches up to 250% of original joint size without tearing – moves with your logs when they move
  • Textured to simulate old-time mortar
  • Easy to smooth and cleans up with water
  • Superior early water resistance
  • Won’t melt Styrofoam® bead board – no more bumpy, unsightly chink lines
  • Tested by you – used on thousands of homes worldwide since 1985
  • Freeze-thaw stable – OK to leave in your truck or garage overnight
Styrofoam® is a registered trademark of The Dow Chemical Company
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Use Log Jam® inside and out:

  • On chink-style log homes
  • To replace old, crumbling mortar on older and historic log homes
  • To create a chinked look on a wood sided surface
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Available Sizes: 29 oz. cartridges and 5 gal. pails

Available Colors: White White, Mortar White, Buff, Light Gray, Gray, Tan, Woodtone Cedar

Log Jam Color Card 550x220
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Learn how to properly apply and tool (smooth out) Log Jam® chinking

Inspiration Gallery

See Sashco’s log home products on real homes and get inspired.

Product Overview

Log Jam®, the standard for synthetic chinking.

Davy Crockett’s log cabin was cozy…except that it wasn’t. He spent a good amount of time plastering mortar into those chinking joints every year. Old-time mortar cracks and crumbles, allowing in wind, bugs, dust, rain and pollen. That’s why Sashco created Log Jam®, the standard in synthetic chinking. Its texture recreates that old-time mortar look while sealing your log home from vermin and wind alike. It stretches and won’t let go when your logs move. With Log Jam® chinking, you can keep the cozy feel and rustic look without compromise.

Inspiration Gallery

See Sashco’s log home products on real homes and get inspired.