Free Ground ShippingWe offer free shipping for all sizes of this product shipping to the Lower 48 United States. Offer does not apply to Alaska, Hawaii, and the US Territories. Free Shipping applies to this item only and not the entire order. Sashco Log Jam Chinking seals the wide joints between your logs with the traditional look of mortar, but with much more elasticity. Log Jam is durable, easy to apply, and stretches up to 250%, even in joints up to 4 inches wide. Log Jam is guaranteed not to crack or peel away from logs and is the only chinking to hold a UL one-hour fire rating. Log Jam Chinking Features & Benefits• Recognized as the industry standard for synthetic chinking• Moves with your logs to create a permanently waterproof and weatherproof seal• Exclusive 1-hour UL fire rating when applied in accordance with Fire Resistance Directory Design No. UL519• Superior elasticity that prevents weather and insect infiltration• Smooth, water-based formula allows for easy application and cleanup • Stable through 5 freeze-thaw cycles• Adheres well to most building materials Where to Use Log Jam • Interior and exterior chinking joints on log and wood homes Where Not to Use Log Jam • Surfaces previously coated with a waxy stain (i.e. Thompson’s Water Seal) or non-drying oil stain (i.e. WoodGuard, Q-8 Log Oil, TWP)• Surfaces specifically designed to be non-stick (i.e. Kynar) • Surfaces previously sealed with silicone; silicone and its residue must first be removed Log Jam Application Methods• Ratchet caulking gun (for tubes)• Bulk-loading caulk gun with follow plate• Grout application bag• Chink pump Log Jam Application Details• Ideal Log Jam application temperature range is between 50-90°F• Ideal Log Jam sealant depth is 1/2 of the joint width, but no less than 1/4" and no more than 1/2"• Before Log Jam is applied, install a bond breaker such as backer rod, Grip Strip, or bond-breaking tape• Clean up hands, surfaces, and equipment with water• Log Jam forms a water-resistant skin approximately 1-4 hours after application• It may be necessary to cover Log Jam with plastic sheeting if applied when rain is imminent• Paintable with oil or latex stains after 1 week cure time• Cure-through time: 3 weeks (1/2" thickness, 70°F, 50% relative humidity)• If restoring Log Jam with chink paint, make sure the chinking has already cured Sashco Log Jam Technical GuidesLog Jam Chinking Product GuidePreventing Blisters in Chinking MaterialDo-It-Yourself Chink Paint Formula with Log Jam ChinkingLog Jam Chinking SDS Log Jam Colors:Buff, Dark Brown, Gray, Light Gray, Mortar White, Tan, White White, Woodtone Cedar Sashco Technical SupportIf you have questions or issues regarding the Sashco line of products, Sashco Technical Support is available at 800-767-5656.