Elastomeric Polyurea Binder for Joints Nosing and Spall Repair
HONEST Binder, Polyurea is a two-component, long work life, elastomeric, polyurea binder designed for
interior and exterior use. Blended with suitable aggregate, Polyurea mortars, concretes and flowable
grouts are used for rebuilding damaged joint nosing and repairing spalled and deteriorated concrete. Neat
binder may be used for gravity filling of saw cuts, control joints and non-structural cracks in concrete.
Cured Polyurea has excellent resistance to vehicular impact and abrasion, most automotive and
aircraft fluids and pavement deicing chemicals. Its short cure cycle, tolerance of damp surfaces (primer
required; see below) and elastomeric mechanical properties make it ideally suited for a wide variety of
concrete repairs. Each type of repair may have specific application and performance requirements.
Evaluation of trial mixes particularly under low temperature, damp conditions prior to installation is
Convenient 1:1, by vol. mix ratio
Fast cure for short downtime
Bonds to dry and damp substrates
Does not embrittle; stays tough and elastic
Resists road, auto and aircraft chemicals
Environmentally safe- No VOC solvents
Limitations: Prime coating of the substrate required on damp
surfaces and for maximum bond strength on dry surfaces. Do
not apply primer/binder system on wet substrates. Minimum
installation temperature is 50 deg. F. Minimum cure
temperature is 40 deg. F. Do not add solvents or otherwise thin
Packaging & Colors: Standard package sizes of Part A & Part
B are 2 and 10 gallons. Standard color is Dark blue-gray;
custom colors available
Shelf Life: One-year minimum in unopened, original
containers when stored between 60 and 90 deg. F in a dry
place away from sunlight. Partially used containers of Part A
must be flushed with nitrogen and resealed immediately after
use to preserve shelf stability.
Chemical Resistance: Polyurea is resistant to a wide
range of commonly used deicing chemicals and aircraft and
automotive fluids. It has limited resistance to hydrocarbon
solvents. Performance is a function of the specific chemical
and concentration, ambient and solution temperatures,
exposure times and housekeeping procedures.
Surface Preparation: Concrete surfaces may dry or damp but
not wet (Polyurea Primer required) and must be sound and
free of all bond-inhibiting substances. Cleaned concrete
surfaces should have a minimum strength of 250 psi in direct
tension. Steel surfaces should be cleaned to "white metal"
according to SSPC SP 5.
For mortars: The preferred aggregate for most applications is
high silica sand (>85% SiO2), washed, kiln-dried, graded and
bagged. The sand particles should be round to sub angular in
shape. A good gradation for low void content is a 2:1 blend of
#12 and #30 mesh. If using a single sand fraction, a #16 or #
mesh is recommended.
For concretes: A 1:1 blend of 3/8 gravel and #16 or # mesh
sand is recommended. The maximum particle size of the
aggregate selected should not exceed 1/3 of the installed
Mixing Polyurea: Polyurea is a two-component system.
The resin to hardener (Part A: Part B) mix ratio is 1:1, by
volume. Read all material safety data (MSDS) information
before handling the product. Wear safety glasses and clean
neoprene rubber gloves when handling the materials. Premix
the individual components before drawing from bulk packaging.
Transfer the appropriate quantity of Part A into a mixing
container. Begin mixing using a Jiffy mixer blade attached to a
low speed (350 - 750 rpm) electric or pneumatic drill Add the
appropriate quantity of Part B taking care to slowly pour the
Part B into the vortex of the mixing Part A. The addition of Part
B should take 30 - 45 seconds. Mix an additional 1 - 2 minutes
after completing Part B addition. Pour the mixed binder into a
mortar or plaster mixer, add aggregate (coarse first, fine last)
and mix an additional 1 - 2 minutes.
Installing: On dry substrates, priming is not necessary. On
damp substrates, prime with mixed Polyurea Primer at a
coating thickness of 8 - 10 mils (160 - 0 sq ft/gal). Apply the
Polyurea neat binder, mortar, concrete or flowable grout
to the primed substrate when the primer is set but still tacky
(approx. 1 - 1.5 hours @ 75 deg. F). Mortars and concretes
may be rodded, tamped, screeded or troweled into place.
Strike-off level with the surrounding substrate with a screed bar
or trowel. Clean application tools frequently.
Clean up: Excess mixed product is best removed from the
work area and tools before it hardens. Use of rags and
solvents such as acetone or heavy-duty detergents facilitate
cleaning. Cured product may be removed from tools by
soaking in an epoxy stripper.
TYPICAL PROPTIES (1)
Property ( 2) Test Method Value
Mix Ratio, A:B, by vol 1: 1
by wt 100: 92
Color: Part A VISUAL Dark blue-gray
Part B Reddish amber
Mixed Dark blue-gray
Weight per Gallon, lb: Part A ASTM D 1475 9.2
Part B 8.1
Viscosity, cp: Part A ASTM D 2393 1300
Part B 100
Gel Time, 60 g, minutes ASTM C 881 25
Thin Film Cure Time, touch dry ASTM D 1640 1.5
hours: hard dry 5.5
Tensile Strength, psi ASTM D 412 1000
Elongation at Break, % 225
Tear Resistance, lbf/in ASTM D 624 185
Water Absorption, % ASTM D 570 1.2
Shore Hardness, A durometer ASTM D 2240 93
D durometer 41
Bond Strength to ASTM D 4541
Prime Coated psi: dry Cement mortar failure (3)
ASTM C 109 damp 300 (3)
Taber Abraser, mg loss ASTM D 4060 43 (4)
(1) The properties listed are typical and descriptive of the product and should not be used for specification purposes.
(2) Cure schedule, 7 days at 73 ± 4 deg. F and test temperature, 73 ± 4 deg. F.
(3) Compressive strength of cement mortar, 4500 psi.(4) CS - 17 wheels, 1000 g load, 1000 cycles.
(4) CS-17wheels, 1000 g load, 1000 cycles.
Handling and Toxicity: This bulletin does not accompany the product when sold. For hazard warnings, safe handling and first aid
instructions, READ CAREFULLY THE MATIAL SAFETY DATA SHEETS AND CONTAIN WARNING LABELS.
Part A: Liquid polyurethane resin, Health Hazard Rating- 2 (Moderate Hazard). Warning! Causes eye and skin irritation. May
cause allergic skin reaction. Harmful if swallowed. Avoid contact with eyes, skin and clothing. Wash thoroughly after handling. Avoid
prolonged or repeated contact with skin.
Part B: Liquid amine hardener, Health Hazard Rating- 3 (Serious Hazard). Contains alkaline amines. Danger! Causes severe
eye end skin burns. May cause allergic skin and respiratory reaction. Combustible, corrosive. Do not get in eyes or skin or on clothing.
Avoid breathing vapor. Keep container closed. Use only with adequate ventilation. Wash thoroughly after handling. Keep away from
heat and open flame.