GacoFlex LM-60
Aliphatic Urethane Coating
LM-60
July 2001
Supersedes 8/00

DESCRIPTION:
LM-60 liquid applied urethane rubber membrane is a water resistant, two component, fifteen to one ratio by volume, 100% solids elastomer.

LM-60H is designed for application on horizontal and low slope surfaces, at the rate of four gallons per 100 square feet (16.3 L / 10 m), to yield a 1/16" (.2 cm) thick membrane. LM-60V is designed for the same application rate and yield on vertical surfaces.

USAGE: Intended primarily for use as a high build waterproofing membrane over concrete, metal and plywood. LM-60 is also used to line potable water storage tanks over 1,000 gallons (3786 L) and water treatment facilities.
CONSISTENCY:
Viscosity of LM-60H, when mixed as directed, is 25,000 to 40,000 centipoises at 75F (24C). LM-60V is thixotropic in consistency and will measure 100,000 to 160,000 centipoises depending upon method of measurement.
COLOR:
Black.
APPLIED PRODUCT DATA
WEATHERABILITY:
LM-60 has excellent durability up to 180F (82C). It may change to a brown color and loss of gloss will occur when weathered outdoors.
CHEMICAL
RESISTANCE:
Excellent resistance to water immersion, good salt and alkali resistance, fair acid and solvent resistance; excellent hydrolytic stability up to 150F (68C).
TENSILE:
ASTM D-412

Strength: 175 psi (1.21 MPa)
Elongation: 300%
Permanent Set at Break: 10% Max.

HARDNESS:
ASTM D-2240 Shore A 30 Min. @ 70F (21C)
TEAR
RESISTANCE:
ASTM D-624 Die C

Lb./In.Min. 30 (5.4 kg / cm)

WATER
ABSORPTION:
ASTM D-471

21 Days R.T. 1% Max.

WATER VAPOR
PERMEABILITY:
ASTM E-96 Procedure BW

100% R.H. Difference 0.012 Perm Inches (.3 mm)

LOW TEMPERATURE
BRITTLENESS:
 

ASTM D-746 Pass @ -50F (-45C)

PACKAGED PRODUCT DATA
PACKAGE:
Four gallon (15 L) kit; 3- gallons (14.2 L) Part A in 5 gallon (19 L) container, plus one quart (.8 L) Part B supplied separately.
COVERAGE:
Mil/Square Feet per Gallon: 1600 (39.2 m / L /.025 mm)
Applied Coverage: 4 Gals./100 Sq. Ft. (16.3 L / 10 m) to yield 1/16" (1.6 mm) thickness
SOLIDS:
Volume 100%
V.O.C.:
None.
TOXICITY:
GacoFlex LM-60 Part B is an isocyanate prepolymer. When mixed with the polyol side (Part A) use adequate ventilation, avoid breathing vapors or spray mist and prolonged or repeated contact with skin. When spraying use a particulate matter mask, an approved organic matter cartridge respirator or fresh air mask. LM-60 is certified by the National Sanitation Foundation to conform to the requirements of NSF Standard 61 - Drinking Water System Components - Health Effects.
FLASH POINT:
ASTM D-56 (Closed Cup) Above 200F (93C)
ADHESION:
Excellent adhesion to clean, dry, plywood and concrete. Primers normally required for other surfaces. See below for specific primer.
STORAGE
STABILITY:
One year at 50 to 80F (10 to 27C)
THINNER:
T-5111 or T-5112. Normally not required, but may be thinned up to 15% by volume if necessary. LM-60 can be thinned when used in conjunction with potable water projects.
APPLICATION
PRIMER:
Ferrous metals E-5320
Copper U-5677
Plywood None Required
Galvanized steel E-5320
Concrete Thinned LM-60H (see thinner section),
roller applied, U-5677 and E-5320 or E-54
MIXING
INSTRUCTIONS:
Stir Part A to suspend any settled pigment. Completely empty Part B container into Part A and power mix for five minutes, scraping the pail side several times.

Use a power mixer which will thoroughly agitate the mix (electric or compressed air powered). A Jiffy Mixer PS21 has been found to work well with LM-60H or LM-60V.

Combine fifteen volumes of Part A with one volume of Part B for quantities less than four gallons. Power mixing is mandatory for quantities over two gallons. Extreme care is required to mix in materials on the side and bottom of the mixing container.

POT LIFE:
One hour at 70 to 80F (21 to 27C). Can be extended to three hours by thinning with T-5112 (up to 15%).
   
APPLICATION:
Trowel or squeegee as mixed. Primed concrete surfaces with U-5677 or thinned LM-60H roller applied. Use a 5/16" x 5/16" V notched trowel or notched squeegee for application to 60 mil (1.5 mm) thickness. LM-60H is self leveling on horizontal surfaces. LM-60V must be flat troweled to a smooth finish since it will not self level at a normal application.

For spray application, refer to spray guide SG LM-60. LM-60 can be spray applied when used in conjunction with potable water projects.

Refer to specification for protection course or covering requirements. Use caution when backfilling or covering to avoid damage to the urethane rubber membrane.

For potable water applications use E-5320 primer with LM-60 horizontal or vertical top coats. Minimum recoat/cure times at 70F (21C): 24 hours/7days. Maximum field use is a two coat system. Potable water tanks must be over 1,000 gallons (3786 L). Water Contact Temperature - CLD 23. Water Contact Material and Code - PUR.