Peelable Solder Masks
862 Technical Data Sheet
862
Description
Our 862
Peelable Solder Mask
is a synthetic latex product for temporary masking of circuit areas and
contacts against solder, rosin, cleaning fluids. It provides effective protections of contacts, gold fingers,
printed circuit card edges and it can be easily peeled off once the wave soldering process is done, after a
subsequently applied conformal coating is sufficiently dry.
Applications & Usages
The 862 mask can be applied by hand or using by template screening, but not by silk screening. It can
also be applied using robotics or pneumatics systems.
Features and Benefits
Withstands Wave Soldering
Non-Corrosive—Safe
for copper, gold, silver, and solder joints
Solvent Solubility
—Largely insoluble once cured (flux and cleaning solvent resistant)
Water Soluble—Can
be thinned with deionized (D.I.) water to adjust viscosity
Immersion Resistant—insoluble
once cured
Room Temperature Cures
or
Quick Heat Curing
Cure Monitoring Color Change—Changes
from opaque pink to translucent red once cured
Ammonia Free—Does
not discolor copper traces
Curing & Work Schedule
Properties
Full Cure @room temp.
Full Cure @65 °C [149 °F]
Full Cure @80 °C [176 °F]
Shelf Life
Value
60 min
30 min
20 min
3y
Coverage and Limits
Properties
Max Intermittent
a)
Withstand Temperature
Coverage per tube
b)
Value
250 °C
[482 °F]
2 400 cm
2
[2.6 ft
2
]
a) A 5 min excursion at the maximum withstand
temperature of 250 °C results in a mask weight
loss of about 15%.
b) Idealized estimate based on a coat thickness
of 500
m
[20 mil].
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Peelable Solder Masks
862 Technical Data Sheet
862
Chemical Components
Name
Acrylic Latex Polymer
Alkoxylated alkyl phenol
Leciithin
C7–C9 Alkyl Benzyl Phthalate
Sodium hydrogen sulfite 2-(acryloylamino)-2- methyl-
1-propanesulfonate -acrylic acid (2:1:1:1)
CAS Number
27401-61-2
9064-13-5
8029-76-3
68515-40-2
97953-25-8
Properties of Cured 862
Physical Properties
Color
Odor
Aqueous Solubility
Solvent Solubility
Weight Loss @ 200 °C, rate 10 °C/min
Weight Loss at
225 °C, rate 10 °C/min
Weight Loss at
250 °C, rate 10 °C/min
Wave Solder Tolerant
Peelability
Method
Visual
Olfactory
—
TGA
TGA
TGA
Value
Red, translucent
Low
Insoluble
Low or insoluble
2.0%
4.3%
7.7%
Yes
Excellent
a) Will not readily dissolve in most organic solvents.
Properties of Uncured 862
Physical Property
Color
Odor
Thickness Recommendation
Viscosity
Density
Boiling Point
Aq. Solubility
Solids Content (w/w)
Method
Visual
Olfactory
Brookfield SP1
ASTM D 1475
Value
Pink, opaque
Low
500–760 µm[20–30 mil]
29 000 cP [29 Pa·s]
1.0 g/ml
≥200 °C [≥392 °F]
Miscible
50%
Compatibility
The 862 mask is compatible with most materials found on printed circuit assemblies; however, in an
uncured state it is not compatible with contaminants like oil, and greasy flux residues. MG Chemicals
recommends cleaning the printed circuit assembly with a suitable electronic cleaner before applying the
862 mask or other coatings.
The chosen electronic cleaner should remove moisture, wax, greases, oils, and all other contaminants.
(See recommended cleaners on page 4.)
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Peelable Solder Masks
862 Technical Data Sheet
862
Health, Safety, and Environmental Awareness
Please see the 862-Liquid
Material Safety Data Sheet
(MSDS) for more details on transportation,
storage, handling and other security guidelines.
Environmental Impact:
The volatile organic content is 50%.
This product meets the European Directive
2011/65/EU Annex II (ROHS);
recasting 2002/95/EC.
Health and Safety:
The mixture may cause skin irritation skin or skin allergies. Most components are not
classified as hazardous.
HMIS® RATING
HEALTH:
FLAMMABILITY:
PHYSICAL HAZARD:
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 (Low or none); 1 (Slight); 2 (Moderate); 3 (Serious); 4 (Severe)
Wear safety glasses and disposable gloves. Wash hands thoroughly after use.
The cured coating presents no known hazard.
NFPA® 704 CODES
* 1
0
0
0
1
0
Application Instructions
Squeeze a desired quantity on board. Use squeegee or template, if available, to get better control of
coverage. If the product is too thick, thin it with deionized (D.I.) water.
To cure at Room temperature
Let air dry 1 hour
To accelerate cure by heat
Put in oven or under heat lamp at 65 °C [149 °F] for 30 minutes.
Put in oven or under heat lamp at 80 °C [176 °F] for 20 minutes.
N
OTE
:
Coats that are very thick require more time to dry.
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Peelable Solder Masks
862 Technical Data Sheet
862
Packaging and Supporting Products
Cat. No.
862-250ML
a) Pack of 10 cans
Electronic Cleaners
Cat. No. 4050A-340G, 4050-1L, 4050-4L, 4050-20L Safety Wash Electronics Cleaner
Cat. No. 406B-450G Superwash Cleaner Degreaser
Cat. No. 824 Isopropyl Alcohol
Form
Tube
Net Volume
250 mL
8.5 fl oz.
Net Weight
0.25 kg
0.55 lb
Shipping Weight
0.25 kg
a)
0.55 lb
a)
Technical Support
Contact us regarding any questions, improvement suggestions, or problems with this product. Application
notes, instructions, and FAQs are located at
www.mgchemicals.com.
Email:
support@mgchemicals.com
Phone: 1-800-340-0772 Ext. 1030 (Canada, Mexico & USA)
1-905-331-1396 Ext. 1030 (International)
Fax: 1-905-331-2862 or 1-800-340-0773
Mailing address:
Manufacturing & Support
1210 Corporate Drive
Burlington, Ontario, Canada
L7L 5R6
Head Office
9347–193rd Street
Surrey, British Columbia, Canada
V4N 4E7
Warranty
M.G. Chemicals Ltd.
warranties this product for 12 months from the date of purchase by the end user.
M.G. Chemicals Ltd.
makes no claims as to shelf life of this product for the warranty. The liability of
M.G.
Chemicals Ltd.
whether based on its warranty, contracts, or otherwise shall in no case include incidental or
consequential damage.
Disclaimer
This information is believed to be accurate. It is intended for professional end users having the skills to
evaluate and use the data properly.
M.G. Chemicals Ltd.
does not guarantee the accuracy of the data and
assumes no liability in connection with damages incurred while using it.
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