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Sikaflex
®
291i technical data sheet
Further information available at:
www.sika.com
S
ikaf
lex
®
-2
91
i 2
/
2
Sika UAE LLC
P.O. Box 213233
Dubai, UAE
Tel: +971 4 4398200
Sika Saudi Arabia Co.
Ltd
P.O. Box 112356
Jeddah, KSA
Tel: +966 2 692 7079
Sika Near East s.a.l.
P.O. Box 55163
Beirut, Lebanon
Tel: +961 1 510271
Sika India Pvt. Ltd.
Infinity Towers, 601 'A' Wing
6 th Floor, Mindspace Malad
(W) Mumbai 400064
Tel: +91 22 40384038
Sika FZCO
P.O. Box 213233
Dubai, UAE
Tel: +971 4 260 21 33
Sika Gulf B.S.C.
P.O. Box 15776
Adliya, Bahrain
Tel: +973 17738188
Sika Egypt for Cons.
Chem. S.A.E.
El Obour City
Cairo, Egypt
Tel: +202 46100714
Sika Pakistan (Pvt.) Limited
141-CCA, Phase lV, DHA
Lahore
Tel: +92 42 35694266/67
Cure Mechanism
Sikaflex
®
-291i cures by reaction
with atmospheric moisture. At low
temperatures the water content of
the air is generally lower and the
curing reaction proceeds slower
(see diagram 1).
Diagram 1: Curing speed for Sikaflex
®
-291i
Chemical Resistance
Sikaflex
®
-291i is resistant to fresh
water, seawater, limewater,
sewage effluent, diluted acids and
caustic solutions; temporarily
resistant to fuels, mineral oils,
vegetable and animal fats and 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.
Method of Application
Surface preparation
Surfaces must be clean, dry and
free from grease, oil and dust. The
adhesion of the sealant can be
improved by wiping the joint with
an appropriate Sika
®
activating
agent and Sika
®
Primer if required.
Advice on specific applications is
available from the Technical Ser-
vice Department of Sika Industry.
Application
Cut off the tip of the nozzle to suit
joint width and apply the sealant
with a suitable hand operated or
compressed-air gun, taking care to
avoid air entrapment.
Do not apply at temperatures
below 10°C or above 40°C. The
optimum temperature for substrate
and sealant is between 15°C and
25°C.
Tooling and finishing
Tooling and finishing must be
carried out within the tack-free time
of the sealant. We recommend the
use of Sika
®
Tooling Agent N.
Other finishing agents or lubricants
must be tested for suitability / com-
patibility.
Removal
Uncured Sikaflex
®
-291i can be
removed from tools and equipment
with Sika
®
Remover-208 or an-
other suitable solvent. Once cured,
the material can only be removed
mechanically.
Hands and exposed skin should be
washed immediately using Sika
®
Handclean towels or a suitable
industrial hand cleanser and water.
Do not use solvents!
Overpaintability
Sikaflex
®
-291i can be overpainted
with most conventional paint
systems. The paint must be tested
for compatibility by carrying out
preliminary trials and the best
results are obtained if the sealant
is allowed to cure fully first,
especially in the case of baked
enamels. Please note that non
flexible paint systems may impair
the elasticity of the adhesive,
impair joint movement and lead to
cracking of the paint film.
PVC based paints and paints that
dry by oxidation (oil or alkyd resin
based) are generally not suitable to
overpaint Sikaflex
®
-291i.
Further Information
Copies of the following publications
are available on request:
- Material Safety Data Sheets
- Sika Pre-Treatment Chart for
Marine Applications
- General Guidelines Bonding and
Sealing with Sikaflex
®
Packaging Information
Tube 100 ml
Cartridge 300 ml
Unipack 400 ml
Unipack 600 ml
Value Bases
All technical data stated in this
Product Data Sheet are based on
laboratory tests. Actual measured
data may vary due to circumstan-
ces beyond our control.
Health and Safety Information
For information and advice re-
garding transportation, handling,
storage and disposal of chemical
products, users shall refer to the
actual Material Safety Data Sheets
containing physical, ecological,
toxicological and other safety-re-
lated data.
Legal Notes
The information, and, in particular, the
recommendations relating to the appli-
cation and end-use of Sika products,
are given in good faith based on Sika's
current knowledge and experience of
the products when properly stored,
handled and applied under normal
conditions in accordance with Sika's
recommendations. In practice, the
differences in materials, substrates and
actual site conditions are such that no
warranty in respect of merchantability
or of fitness for a particular purpose,
nor any liability arising out of any legal
relationship whatsoever, can be in-
ferred either from this information, or
from any written recommendations, or
from any other advice offered. The user
of the product must test the product’s
suitability for the intended application
and purpose. Sika reserves the right to
change the properties of its products.
The proprietary rights of third parties
must be observed. All orders are ac-
cepted subject to our current terms of
sale and delivery. Users must always
refer to the most recent issue of the
local Product Data Sheet for the prod-
uct concerned, copies of which will be
supplied on request.
Time [days]
0
0 2 4 6 1 2
6
2
4
8
1 2
1 0 8
1 0
23°C (73°F) / 50% r.h.
Th
ic
knes
s
of
c
ur
e
[m
m
]
10°C (40°F) / 50% r.h.