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Product Data Sheet
Version 8/14/08
Sikaflex
-255 FC
High Strength, Elastic Adhesive
Technical Product Data (typical values)
Chemical base
1-C polyurethane
Color
Black
Cure mechanism
Moisture Curing
Density (uncured)
10.1 lb/gal
VOC (EPA method 24)
0.53 lb/gal (64.1 g/l)
Non-sag properties
Excellent
Application temperature
product
50-95F (10-35C)
Tack free time
1
30 min
Curing speed
(see diagram 1)
Shrinkage
3% approx.
Shore A-hardness (ASTM D 2240)
52-57
Tensile strength (ASTM D 412)
870 psi
Elongation at break (ASTM D 412)
400%
Tensile lap-shear strength (ASTM D 1002)
580 psi
Volume resistivity (ASTM D 257-99)
1X10
7
Wcm appx.
Service temperature
permanent
-40-194F (-40-90C)
Shelf life (storage below 80F (27C))
9 months
1)
73F (23C) / 50% r.h.
Description
Sikaflex
-255 FC is a fast curing,
flexible,
high-performance
one-
component,
polyurethane
based
adhesive for bonding glass, panels
and other structures to a variety of
substrates.
Sikaflex
-255
FC
begins to cure and exhibit excellent
green strength as soon as the
product is extruded or the cartridge
is opened. Sikaflex
-255 FC is not
for use in the replacement of
automotive windshields. Sikaflex
-
255
FC
is
manufactured
in
accordance with ISO 9001/14001
Quality Assurance Systems and the
Responsible Care Program.
Product Benefits
- One-component
- Low odor
- Bonds and seals at the same time
- Short tack free and curing time
- Very high thixotropy for good gap
filling properties
- Adhesion to a wide range of
substrates
- Non-staining curing process
- Non-corrosive
- Initial load bearing capacity
- Overpaintable with many coatings
(Consult Sika)
- Increases torsional stiffness of
final assembly
- Shock/Impact resistant
- Vibration and sound damping
properties
Areas of Application
Sikaflex
-255 FC is suitable for use
on glass as well as metal panels
(primed and painted). Sikaflex
-255
FC offers extremely high initial bond
strength. Its fast rate of cure results
in rapid strength development and
shorter service times.
- Bonding trim, molding and all
kinds of styling elements
- Structural bonding of large parts,
including sheet metal, composites
and glass
- Used to replace rivets and other
mechanical fasteners
- This product is suitable only for
experienced professional users.
- Tests with actual substrates and
conditions have to be performed to
ensure adhesion and material
compatibility.
S
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Further information available at:
www.sikaindustry.com
Sika Corporation
Industry Division
30800 Stephenson Highway
Madison Heights, MI 48071
USA
Tel. 248 577 0020
Fax 248 577 0810
Cure Mechanism
Sikaflex
-255 FC cures by reaction
with atmospheric moisture. At low
temperatures, the water content of
the air is lower and the curing
reaction proceeds somewhat slower
(see diagram).
Time (days)
0
0
2
4
6
23C / 50% r.h
10
8
12
10C / 50% r.h
4
T
h
i
c
k
n
e
s
s
o
f
c
u
r
e
(
m
m
)
Diagram 1: Curing speed Sikaflex
-255 FC
Chemical Resistance
Sikaflex
-255 FC is resistant to
fresh water, seawater, dilute acids
and caustic solutions; temporarily
resistant to fuels, mineral oils,
vegetable and animal oils; not
resistant to organic acids, alcohol,
concentrated mineral acids and
caustic solutions or solvents. The
above information is offered for
general guidance only. Advice on
specific applications will be given on
request. Contact the Technical
Service Department of Sika Industry
at 888-832-7452.
Method of Application
Surface preparation
Surfaces must be clean, dry and
free from all traces of grease, oil and
dust. The surfaces must be treated
with a cleaning or activating agent
and/or primed with the appropriate
primer.
See
Sika
Surface
Preparation Guidelines or contact
the Technical Service Department of
Sika Industry at 888-832-7452.
Application
Cartridges: Pierce cartridge nozzle
opening.
Unipacs: Place unipac in
the application gun and snip off the
closure clip. Cut tip of nozzle to
appropriate size. For satisfactory
results the adhesive must be applied
with a piston type manual, air or
battery cartridge gun. To ensure
uniform thickness of adhesive bead,
we recommend that the adhesive is
applied in the form of a triangular
bead (see illustration). Do not apply
below 50F (10C) or above 95F
(35C). The optimum temperature
for substrate and adhesive is
between 59F (15C) and 77F
(25C).
Bulk: For advice on
selecting and using a suitable pump
system, please contact the System
Engineering Department of Sika
Industry at 248-577-0020.
b
b
h
2h
Figure 1:
Recommended bead
configuration
Tooling and finishing
To facilitate tooling, wet finger or
best available tool with Sika
-Slick
or light soapy water. Do not use
alcohol as a tooling agent.
Removal
Uncured Sikaflex
-255 FC may be
removed with Sika
Remover 208 or
Mineral Spirits. Do not use solvents
containing alcohol as a cleaning
agent. Cured Sikaflex
-255 FC may
only be removed mechanically.
Overpainting
If overpainting is desired, the paint
and paint process compatibility must
be tested before use. Contact Sika
Technical Services Department in all
cases at 888-832-7452.
Limitations
- For best results, use opened
cartridges the same day.
- When applying sealant, avoid air
entrapment.
- Do not use on polyethylene,
polypropylene, silicone, PTFE, and
certain plasticized resins (consult
our Technical Services
Department for advice).
- When working in low temperature
conditions, allow cartridge to reach
room temperature.
- Always use a piston type cartridge
gun (hand operated or pneumatic)
to apply adhesive.
- Avoid contact with alcohol and
solvents containing alcohol during
application and curing.
WARNING:
IRRITANT,SENSITIZER
Contains
Polyisocyanate
Prepolymer (Mixture), Isophorone
Diisocyanate
(CAS
4098-71-9),
Methylene
Bisphenyl
Isocyanate
(CAS 101-68-8) and Xylene (CAS
1330-20-7). Causes eye irritation.
May cause skin/respiratory irritation.
May cause skin and/or respiratory
sensitization
after
prolonged
contact.
May
be
harmful
if
swallowed. Reports have associated
repeated and prolonged exposure to
some of the chemicals in this
product with permanent brain, liver,
kidney
and
nervous
system
damage. Headaches and dizziness
may result.
Deliberate misuse by
inhalation of vapors may be
harmful or fatal. Strictly follow all
usage, handling and storage
instructions.
HMIS
Health
*2
Flammability
1
Reactivity
0
Personal Protection
C
First Aid
Eyes Hold eyelids apart and flush
thoroughly
with
water
for
15
minutes.
Skin
Remove
contaminated clothing. Wash skin
thoroughly for 15 minutes with soap
and water.
Inhalation Remove to
fresh air.
Ingestion Do not induce
vomiting. Dilute with water. Contact
physician.
In all cases contact a
physician
immediately
if
symptoms persist.
Further Information
Copies of the following publications
are available on our website
www.sikaindustry.com:
-Material Safety Data Sheets
-Product Data Sheet
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Further information available at:
www.sikaindustry.com
Sika Corporation
Industry Division
30800 Stephenson Highway
Madison Heights, MI 48071
USA
Tel. 248 577 0020
Fax 248 577 0810
-Sika Primer Chart
-General guidelines for bonding and
sealing with Sika products
In case of emergency call:
Chemtrec: 800-424-9300
International: 703-527-3887
For further information and advice
regarding transportation, handling,
storage and disposal of chemical
products, users should refer to the
actual Material Safety Data Sheets
containing
physical,
ecological,
toxicological and other safety related
data. It is highly recommended to
read the actual Material Safety Data
Sheet before using the product.
- KEEP OUT OF REACH OF
CHILDREN
- NOT FOR INTERNAL
CONSUMPTION
- FOR INDUSTRIAL USE ONLY
- KEEP CONTAINER TIGHTLY
CLOSED
Packaging Information
Cartridge
10.1 fl. oz.
Pail
4.5 gal
Drum
50 gal
Value Basis
All technical data stated on this
Product Data Sheet are based on
the results of laboratory tests only.
Actual measured data in the field
may vary due to site specific
conditions which are not known to
Sika and beyo