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 tool and cleans up with water
    Superior early water resistance
    Won’t melt Styrofoam® bead board – no more bumpy, unsightly chink lines
    Trusted go-to log cabin chinking – used on thousands of homes worldwide since 1985
    Freeze-thaw stable: OK to leave in your truck overnight

Styrofoam® is a registered trademark of The Dow Chemical Company

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Use Log Jam® interior and exterior:

  • 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 industry standard for synthetic chinking.

Davy Crockett’s cabin was cozy…except that it wasn’t. He spent a good amount of time plastering mortar into those joints every year. Old mortar cracks and crumbles out of the joints, allowing in wind, bugs, dust, rain and pollen. That’s why Sashco created Log Jam®, the industry standard for synthetic chinking. Its texture recreates that old-time mortar look while sealing your rustic cabin from vermin and wind alike. It stretches and won’t let go when your logs move. With Log Jam, 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.