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Log Jam

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Log Jam, Chinking, Sashco

Free shipping on 5 gallon pails

Michigan Sashco dealer

Chinking is a flexible sealant that is used to seal the joints of log homes. No matter what type of log property you own, it is important to use chinking, a synthetic mortar, to keep the log joints sealed.

Chinking coverage estimator

General coverage estimator

Product Coverage Rates per 5 Gallon Pail:
1/2″‘ Wide Chinking Joint x 1/4″ Depth = 770 Lineal Feet
1” Wide Chinking Joint x 1/2″ Depth = 195 Lineal Feet
1 1/2″ Wide Chinking Joint x 1/2″ Depth = 125 Lineal Feet
2″ Wide Chinking Joint x 1/2″ Depth = 95 Lineal Feet
3″ Wide Chinking Joint x 1/2″ Depth = 65 Lineal Feet
4″ Wide Chinking Joint x 1/2″ Depth = 45 Lineal Feet

Insulate and protect your log home in style with Log Jam Chinking! This chinking acts as a form of insulation and as a barrier to the elements outside, allowing you to be comfortable inside your log home. Log Jam is the elastic chinking that simply responds better to log movement than other chinking and maintains the traditional look of mortar without stretching out.

  • Tightly grips to all species of wood including oily woods like cedar
  • Will not pull away from log surfaces
  • Will remain elastic and not tear up under normal log movement conditions, up to 100% in joint movement
  • Compatible with most sealers and preservatives
  • Protects from Log Rot
  • Not intended to be used as stucco
  • Log Jam® Chinking benefits include:
    • 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


Dimensions for 29 oz tube: 15″ W x 6″ H x 20″ L actual size


Cracked Chinking: If a log joint is deeper than 1/4 in. and backer rod was not used, there is a very good chance that the chinking will crack. What happens is the logs will naturally expand and contract and since there is no bond breaker to allow the chinking to stretch in the middle, the caulking or chinking cracks in the center.

Depending on the condition of the caulk or chinking, the material could be completely torn out, backer rod installed and then caulk or chinking reapplied. An alternative to removing all of the material is to run a length of packaging tape down the middle of the joint, over the chinking material as shown on the right (the tape will act as a bond breaker). Then cover the old caulking and packaging tape with a new layer of caulk or chinking as shown.

Additional information

Weight 42 lbs
Dimensions 1 × 1 × 1 in

5 gallon pail, 29 oz tube, 29 oz box of 10


White White, Mortar White, Buff, Tan, Light Gray, Gray, Woodtone Cedar, Dark Brown