Product Data Sheet
MULTI-CURE 984 CONFORMAL COATING
DESCRIPTION
Multi-Cure 984 is a single component, 100% solids conformal coating specifically formulated for rapid room
temperature cure when exposed to longwave (320-380 nanometer) UV light. Thin and thick layer coatings are
achieved in seconds upon exposure to high intensity UV light. Potting to depths in excess of 25,4 mm are
possible.
Upon cure, Multi-Cure 984 produces a hard, clear glossy coating and should be the Dymax conformal coating
product of choice in applications not requiring post cure fluorescence.
Multi-Cure 984 also exhibits excellent adhesion to a variety of metal, ceramic and glass-filled epoxy surfaces. It is
a moderately low viscosity coating which can be cured by exposure to UV light and secondarily with heat for
shadowed areas on densely populated circuit boards. Multi-Cure 984 is approved to Military Specification
MIL-I-46058, Type UR (QPL#356-88). 984 meets "NSA" hydrolytic stability (reversion) requirements. 984
passes UL-94 Flammability rating.
UNCURED PROPERTIES
Solvent Content
Appearance
Specific Gravity
Pot life
Viscosity[1]
None
Single Component/Clear Liquid
1.1
12 Months
350 mPas (nominal)
CURED PROPERTIES
PHYSICAL
Durometer Hardness
Tensile at Break
Elongation at Break
Water Absorption
Cross Hatch Adhesion Test:
D80
42,78 N/mm2
5%
0,4%
Copper 100%
G-10
100%
THERMAL
Thermal Limit (brittle/degrades)
Coefficient of Linear Thermal Expansion
-54 to 149C
69 x 10-6 1/K
ELECTRICAL
Dielectric Strength
Volume Resistivity
Surface Resistivity
Dissipation Factor, 1MHz
Dielectric Constant, 1MHz
70,87 KV/mm
35.8 x 1012 ohm-cm
384 x 1012 ohm
0.03 (23C)
3.41 (23C)
CURE SCHEDULE - UV Cure with 365 nm UV light[2]:
250 milliwatts/cm2 Intensity 30 seconds
2,500 milliwatts/cm2 Intensity 1 second
ASTM D-2240
ASTM D-638-77A
ASTM D-638-77A
ASTM D-570
ASTM D-1304
ASTM D-1304
ASTM D-1304
ASTM D-1304
ASTM D-1304
Product Data Sheet
Heat Cure Following UV Exposure
Heat can be used as a secondary cure mechanism where all adhesive cannot be cured with UV light. UV cure must be done prior to heat
cure. Application may employ dip, spray or curtain coat. The following cure schedule may be used:
110C
120C
150C
1 hour
30 minutes
15 minutes
FACTORS AFFECTING CURING




Dark surfaces lengthen cure time. Thicker films require longer cure times.
Full range (UV-A, B & C) lamps provide faster cures than filtered sources.
All UV sources degrade with use. Check output periodically with a radiometer.
Light intensity decreases as distance from UV source increases.
HANDLING AND DISPENSING ADHESIVE
Typically Dymax 984 is dipped or sprayed. For questions relating to dispensing, curing systems, the products or the use of products,
contact Dymax Technical Service.
Repeated or continuous skin contact may cause sensitization and should be avoided. Do not wear jewelry. The use of barrier hand cream
is recommended. Do not wear absorbent gloves. Adhesive may be removed with hand soap and water. Avoid eye contact. See
CAUTION below. Wipe excess adhesive with paper towels; remove residue with chlorinated solvents, freon, methanol, ethanol, or
isopropanol.
STORAGE AND SHELF LIFE
Do not expose to UV light source or sunlight. Product has a one year minimum shelf life when stored below 32C and out of sunlight and in
original, unopened container.
Dymax product 984 does not support fungal or bacterial growth.
CAUTION
For industrial use only. Avoid breathing vapors. Avoid contact with eyes and clothing. In case of contact, immediately flush with water for
at least 15 minutes; for eyes, get medical attention. Wash clothing before reuse. Keep out of reach of children. Do not take internally. If
swallowed, vomiting should be induced at once and a physician called. For specific information, refer to the product’s Material Safety Data
Sheet before use.
NOTES
[1]
[2]
Measured at 20 rpm and 25C using a Brookfield Model RVF Viscometer.
Euv = mW.s = mJ
cm2
cm2
For example, if the intensity of a light source is 2500 mW/cm2 and a part is exposed for 1 second, then the total UV energy would be
2500 mJ or 2.5 J/cm2.
cm2
Distributed by:
DYMAX Europe GmbH
Trakehner Str. 3
60487 Frankfurt/Main
Phone: +49-(0)69-7165-3568
Fax: +49-(0)69-7165-3830
e-mail: dymaxinfo@dymax.de
Internet: www.dymax.com
The data contained in this bulletin which represents typical results, is furnished for information only, and is believed to b e reliable. We cannot assume responsibility for results obtained by others over whose
methods we have no control. It is the user's responsibility to determine suitability for the user's purpose of any product o r method mentioned herein and to adopt such precautions as may be advisable for the
protection of property and persons against any hazards that may be involved in the handling and use thereof. Nothing in this bulletin is to be inte rpreted as a representation of freedom from domination of
patents owned by others or a license under a Dymax Corporation patent. W e recommend that each prospective user test the proposed application before repetitive use, using the data as a guide. For specific
information, refer to Material Safety Data Sheet before use.
984/12/98