Technical Specifications

Colors: Mortar White, White White, Buff, Tan, Gray,
Woodtone Cedar
Packaging: 5-gallon straight-sided white pails and 29
oz. fiber cartridges
Water Resistance: Log Jam forms a water-resistant
skin in 1-4 hours after application.This resistance depends
on bead size, humidity and temperature. If applied in cool
or humid weather and rain is imminent, covering the
chinking with a plastic sheet may be necessary.
1-Hour Fire Rating: Log Jam passes the UL1-hour
fire rating when applied in accordance with UL File
R11694-1,-2; Fire Resistance Directory Design No. UL
519.
Service Range: -30˚F to 250˚F
Paintability: Paintable with oil or latex stains after 1
week cure time. If giving chinking a facelift with Brush
Over, make sure chinking is cured.
Compatibility
3
: Compatible with most sealers and
preservatives, including linseed oil, borates, pen-
tachlorophenol and copper compounds.NOTE: Some coat-
ings contain wax or other chemicals, making adhesion dif-
ficult. Call Sashco for more information.
Shelf Life: 1 year from date of packaging.
Passes: Surpasses ASTM C834-86 (Latex Sealing
Compounds); meets ASTM E-119; T T-S-00230B; A S T M
G-53 (QUVAccelerated Weathering: 4,000 hours); A S T M
D-638 (Max = 230%); ASTM D-638 (Tensile Strength:
38.4 psi); ASTM C-920 (12.5); NFPA251, UL263, meets
F H Ar e q u i r e m e n t s .
VOC: 0.28 lbs./gal; 34 g/liter
Physical Properties:
Adhesion
1,2
(180˚ Peel): Call Sashco for stain compatibility with Log Jam
Cure Through Time: 3 weeks (1/2” thickness. 70˚F, 50% relative humidity)
Viscosity: Approx. 200,00 cps at 10 rpm, spindle #14.
Freeze-Thaw: Passes at least 5 cycles (0˚F to 70˚F)
Hardness (Shore A): 36
Slump: 1/16” (Maximum) in test joint (3-1/2”H x 3/4”D) at 70˚F
Stain: None
Tack-Free Time: Less than 30 minutes (70˚F, 50% relative humidity)
Wa t e rR e s i s t a n c e : No washout (4 hours, 40˚F, 50% relative humidity)
Weathering: Washout None
Cracking None
Discoloration Passes ASTM C834-76
Snow: Be cautious of areas where snow builds up around the structure and
remains for extended periods of time. Snow removal is recommended for
these areas to ensure the ultimate adhesion of Log Jam.
1
Ultimate adhesive strength attained in 3-6 weeks depending on bead size,
temperature and humidity.
2
Dry adhesion is tested after 28 days room temperature cure. The average of
several tests is reported.
3
Sashco will test any stain to determine compatibility with Log Jam. Just call
and send us a sample of the stain you want tested. Test results available in a
minimum of 6 weeks.
Technical Data:
10300 E. 107th Place • Brighton, CO 80601
1-800-767-5656 • [phone] • www.sashco.com
LJC 002
02/02
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will furnish new Log Jam to repair the damaged
joint areas. This warranty includes product replace-
ment only. No other warranties are expressed or
implied. Proof of purchase required. Sashco, Inc.
reserves the right to inspect the structure prior to
any product replacement.
Extended Warranty Available—Lifetime
Limited Warranty! Call Sashco for details.
Logs Move!
Occasionally, a small number of logs on any
home may undergo extreme movement due to their
changing moisture content as they come to equilibri-
um in their new settings as part of a log home. Most logs, as they dry
(or go through the repeated process of taking on and giving up mois-
ture), will undergo moderate levels of stress on sealants applied to
them. An occasional log (randomly and unpredictably) will twist,
shrink or warp—in response to changes in its moisture content—in an
extreme way, moving more than any sealant can possibly handle.
When this extreme movement occurs it will cause the sealant to fail
either cohesively or adhesively. If the failure is cohesive (sealant splits
down the middle) then the repair is performed by cleaning the surface
of the failed sealant and reapplying more. If the failure is adhesive
(sealant pulls away from the substrate), then the sealant needs to be
removed and completely redone.
(Not to be considered specifications.)