Chemtronics UR-A CTURA5 User Manual
of Cured Coatings (-65°C to 125°C)
Tack Free Time
(@ 60% R.H.) 8 Hours @ 170°F (77°C)
(Water=1) @ 68°F
Coefficient of Thermal 1.5 x 10
-4
Expansion
Dielectric Breakdown (volts)
2 years
RoHS Compliant
VOC Content
TDS # CTURA1
CHEMTRONICS
Technical Data Sheet
Konform® UR-A
Water Based Urethane Conformal Coating
PRODUCT DESCRIPTION
Konform® UR-A water-based urethane
conformal coating is designed to deliver
outstanding conformal coating protection using a
water-based carrier. It is engineered for
applications where durability and environmental
protection against moisture and air-borne
contaminants are required, while minimizing the
use and impact of VOC’s. This extremely
effective conformal coating provides protective
barrier against humidity, salt, corrosive vapors
and fungus for printed circuit board and
electronic assemblies. Coating meets IPC-CC830B Class B and sections of MIL-I-46058C,
Type UR.
Outstanding barrier and moisture protection
Water-based material with a low odor, easy
to apply
Dries to a clear, highly durable coating
Effective abrasion and solvent resistance
Increases life of electronic assemblies
Will not discolor over time under normal use
Contains a UV indicator for Quality Control
inspection using medium intensity light at
265-335 nm
TYPICAL APPLICATIONS
Konform® UR-A water-based conformal
coating is ideal for applications in:
Automotive Manufacturing
Data Communications
Instrumentation
Marine Manufacturing
Process Control
TYPICAL PRODUCT DATA AND
PHYSICAL PROPERTIES
Usable Temp. Range 85ºF to 257ºF
1 hour
Curing Conditions 24 Hours @ 77°F (25°C)
Specific Gravity 1.03
Viscosity (cps @ 77°F) 500± 5 cps
Dielectric Strength (volts / mil) 89 volts / mil
Flash Point (TCC) None
3340 volts
Coverage 577 mil sq. ft
Shelf life
CARB & OTC
VOC Content
SCAQMD
*Volatile Organic Compound (VOC) information is calculated on a
weight basis using the VOC definition of California Air Resources
Board (CARB) Consumer Product Regulations, South Coast Air
Quality Management District (SCAQMD) Rule 102 and the Federal
definition published in 40 CFR 51.100(s).
334 g/L
16% VOC
COMPATIBILITY
Konform® UR-A Conformal Coating is
Performance
Moisture Resistance
Excellent
Removability
Fair
Ease of Repair
Good
Flexibility
Excellent
Adhesion
Excellent
Abrasion Resistance
Excellent
Solvent Resistance
Good
generally compatible with most materials found
on printed circuit boards. As with any chemical
product, product/component compatibility must
be determined on a non-critical area prior to use.
Do not use on bare, untreated iron and steel.
USAGE INSTRUCTIONS
For industrial use only.
Read MSDS carefully prior to use.
Before applying Konform® UR-A water-based
conformal coating, clean circuit boards thoroughly to
remove oil, grease, dirt, flux and all other types of
contamination. Allow to dry. Cleaning may be
performed with Chemtronics Electro-Wash or
Eco-Rite™ degreasing products. Do not apply to
iron or untreated steel.
DIP APPLICATION: Using automatic equipment
or hand immersion technique, slowly immerse PCB
into the coating and remove slowly. Use an average
rate of approximately 1 foot per minute. After
allowing the board to cure, process may be repeated
to achieve desired thickness.
BRUSH APPLICATIONS: Evenly apply coating
to areas desired at thickness required. Allow time
for curing before reapplying to achieve a thick
coating. Use Chemask to protect components
during conformal coating process.
CURING: For the best coating appearance and
adhesion, cure in conditions with good air flow and a
relative humidity below 70% . Accelerated cure may
be accomplished by lowering ambient humidity, or
elevating temperature up to 170°F (77°C).
REMOVAL: After application, cured Konform®
UR-A Conformal Coating may be removed by
soaking in Chemtronics Electro-Wash Two Step.
AVAILABILITY
CTURA1 1 Gallon Liquid
CTURA5 5 Gallon Liquid
CTURA55 55 Gallon Liquid
TECHNICAL & APPLICATION ASSISTANCE
Chemtronics provides a technical hotline to answer
your technical and application related questions.
The toll free number is: 1-800-TECH-401.
NOTE: This information is believed to be accurate. It
is intended for professional end users having the skills to
evaluate and use the data properly. CHEMTRONICS
does not guarantee the accuracy of the data and assumes
no liability in connection with damages incurred while
using it.
CHEMTRONICS
8125 COBB CENTER DRIVE
KENNESAW, GA 30152
1-770-424-4888
Chemtronics, Chemask, Konform® and Electro-Wash
are registered trademarks of Chemtronics. All rights reserved.
Eco-Rite™ is a trademark of Chemtronics. All rights
reserved.
.
DISTRIBUTED BY:
REV. B (08/13)
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