User Guide

DATA TEC
extruded polystyrene board as a bond breaker..
5. Gun the chinking over the backing material. Ideal
sealant depth is half of the joint width, but no less
than 1/4”, nor more than 1/2”.
6. Tool Log Jam to ensure good contact with the log
surfaces, especially to the upper log; this will greatly
aid adhesion.
7. All chinking products may occasionally “blister”.
To avoid blistering:
• Do not apply in direct sunlight.
• Protect fresh chinking from direct sunlight for 1-2
days after application with white plastic sheeting
tacked over it.
• For detailed information, read Sashco’s Savvy
Bulletin, “Preventing Blisters”.
Application
Surface Preparation
Best results are obtained when Log Jam is applied to
wood that has been previously coated with a compatible
and thoroughly cured stain. In fact, Log Jam has a
Lifetime Limited Warranty when applied over any of
Sashco’s stains: Capture Log Stain/ Cascade staining sys-
tem, High Sierra, Transformation, or Symphony Interior
Clear Coat. Call us for details on this special warranty—
the best in the industry!
If you select a different stain, make certain that it is
compatible with Log Jam. If the stain is older but still
intact, clean the log surfaces thoroughly to remove dirt,
pollen, bird droppings and other surface contaminants.
The USDA Forest Products Laboratory and other
researchers around the world have reported that surface
wood exposed to sunlight for as little as 1-2 weeks can
become significantly damaged and unsound, which may
lead to premature adhesive failure of the stains or other
coatings applied to it. It can also hurt Log Jam's (or any
chinking's) adhesion to the surface. Once bare wood has
been properly cleaned and prepped to remove unsound
wood, stain should be applied as soon as possible. Follow
with Log Jam chinking.
If a stain is applied over Log Jam, it will be tinted the
stain color, but will be affected differently than the sur-
rounding wood; therefore, test appearance before
wide-
spread use.
10300 E. 107th Place • Brighton, CO 80601
1-800-767-5656 • 303-286-7271 • www.sashco.com
12-10
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merchantability or fitness for a particular purpose, which war-
ranties are specifically excluded and disclaimed. This Warranty
gives you specific legal rights. You may have other rights which
vary from state to state. Some states do not allow exclusion of
implied warranties in consumer or other sales, limitation on the
duration of implied warranties, or exclusion or limitation of inci-
dental or consequential damages. Thus, the limitations or exclu-
sions contained above may not apply to you depending upon your
specific circumstances.
10-Year Warranty
When applied in accordance with the Data Tec sheet LJC 002,
Sashco Sealants warrants Log Jam for the following items for 10
years: 1) It will not pull away from log surfaces 2) It will remain
elastic and stretch up to 100% (+/-50%) of the original joint size.
If Log Jam fails to perform as specified above, return proof of pur-
chase and Sashco will furnish product to repair the damaged areas.
This warranty includes product replacement only. Labor costs for
application of any product are specifically excluded. No other
warranties are expressed or implied. Sashco, Inc. reserves the right
to inspect the structure prior to any product replacement. (Special
color matches excluded.) Contact Sashco for information on the
Limited Lifetime Warranty.
Since its introduction in 1985, Log
Jam chinking has been the recognized
industry standard in elasticity, adhe-
sion and durability. Here's why:
• Log Jam moves with your logs and
sticks like no other, eliminating
costly repairs.
• Log Jam has superior early water
resistance. No more worrying about
that unexpected rain storm.
• Log Jam won't eat away at
Styrofoam bead board. No more
unsightly chinking lines that look
dented and deformed – just the rustic, traditional look of
mortar you want.
• Log Jam has been used on thousands of log homes
throughout the world. Backed by a limited lifetime guar-
antee, you can be confident that you’re using the right
product for your dream home.
When other chinking pulls away, leaving your home vul-
nerable to weather, air infiltration and insects, Log Jam is
still maintaining the tight seal it had when first applied.
Fundamental Chinking
Application Guidelines
Proper substrate preparation and application are
imperative for product longevity. Read this instruction
sheet, LJC 002, before applying any product.
1. Best results are obtained when Log Jam is applied to
clean, dry, stained wood. Make certain there is compati-
bility between your stain and Log Jam. Log Jam has a
lifetime warranty when applied with Sashco's stains:
Capture Log Stain / Cascade staining system, High
Sierra, Transformation and Symphony Interior Clear
Coat. If using a different stain or finish, contact Sashco
for guidance. Call 1-800-767-5656, or visit and chat live
at www.sashco.com.
2. Check the weather forecast. Finishing products are best
applied in moderate weather conditions, i.e., out of
direct sunlight, in dry, warm conditions.
3. Check the log surface temperature. The surface tempera-
ture should be between 40˚-90˚F (4˚-32˚C).
4. Install a bond breaker before Log Jam is applied.
Backer rod, Grip Strip, and clear packing tape all per-
form this function well. If Log Jam is applied over
white styrene bead-board or Tyvek house wrap, it is best
to cover the bead-board or wrinkle-free house wrap with
clear packing tape (to prevent adhesion to those materi-
als). We do not recommend the use of blue or pink
Log Jam holds its seal.
Competitive brand.
Technical Data
(Not to be considered specifications)
Colors
Mortar White, White White, Buff, Tan, Gray, Woodtone Cedar
Packaging
5-gallon straight sided pails and 29 oz. fiber cartridges
Application Range
40˚–90˚F (4˚–32˚C)
Service Range
-30˚–250˚F (-34˚–121˚C)
Jog Jam Coverage Rate
Paintability
Paintable with latex coatings after a minimum of 24 hours curing
(longer on wider joints) and after 5 days with most oil-based coatings.
Contact Sashco for more specific guidance.
Compatibility
Log Jam will adhere to woods treated with most preservatives includ-
ing borates**, pentachlorophenol, and copper compounds. Log Jam is
also compatible with insulating glass sealants and most building mate-
rials, including foam insulation and vinyl windows.
** Some borate wood preservatives contain glycols or other agents
that could interfere with adhesion. Sashco’s PeneTreat
®
contains
no glycols.
Specifications
Passes ASTM C-834, ASTM G-53 QUV, ASTM D-638 and ASTM C-920
VOC
Less than 1.5% by weight, max.
Tack-Free Time
Less than 30 min. (70˚F, 50% relative humidity)
Cure-Through Time
3 weeks (1/2” thickness, 70˚F, 50% relative humidity)
Extrusion Rate
800 g/min (1/8” orifice at 40 psi)
F
reeze-Thaw
Passes 5 cycles (0˚F - 70˚F)
Hardness, Shore A
29
Elongation @ Break
175%
Slump
1/16”(max.) in test joint (3.5”H x ¾”D) at 70˚F
Stain
None
Water Resistance
No washout (4 hours, 40˚F, 50% relative humidity)
In severe conditions - under 40˚F (4˚C) and/or 70%+ humidity – full
rain resistance may take longer. Cover exterior walls with plastic if
rainfall is expected within 24 hours after installation.
Not recommended for continuous submersion or areas exposed to foot
or vehicular traffic.
Weathering
Washout None
Cracking None
Discoloration Passes ASTM C-834
Notice
Sashco will test any stain to determine compatibility with Jog Jam.
Just call and send us a sample of the stain you want tested. Test results
available in a minimum of 6 weeks.
The data reported here are believed to be reliable. No warranty is made or
implied concerning the accuracy or the results obtained from their use.
LINEAL FEET
Joint Recommended Per 5 Per 29 oz.
Width Joint Depth* gal. pail cartridge
1/2" 1/4" 770 35.0
1" 1/2"** 195 8.9
1.5" 1/2"** 125 5.7
2" 1/2"** 95 4.3
2.5" 1/2"** 75 3.5
3" 1/2"** 65 3.0
3.5" 1/2"** 55 2.5
4" 1/2"** 45 2.0
*Refer to the Log Jam data tec (LJC 002) or product packaging for more details
about proper joint design. ** If applied 3/8" deep, increase lineal feet approx. 35%