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SIKAFLEX
®
291 TECHNICAL DATA SHEET
Sikaflex
®
-291 1 / 2
Technisches Merkblatt
Version 12 / 2005
Sikaflex
®
-
291
Der haftstarke Marine
-
Dichtstoff
Technische Eigenschaften
Chemische Basis
1-
K Polyurethan
Farbe
weiss, schwarz, holz
Härtungsmechanismus
feuchtigkeitshärtend
Dichte vor Aushärtung (DIN 53479)
ca. 1,3
kg/l, farba
b-
hängig
Standfestigkeit
gut
Verarbeitungstemperatur
+5°C -
+40°C
Hautbildezeit
1
ca. 60 min
Durchhärtegeschwindigkeit
(siehe Diagramm 1)
Volumenänderung (DIN 52451)
ca.
-
5%
Härte Shore A (ISO 868 / DIN 53505)
ca. 40
Zugfestigkeit (ISO 52
7 / DIN 53504)
ca. 1,8 N/mm
2
Reissdehnung (ISO 527 / DIN 53504)
ca. 500%
Weiterreisswiderstand (ISO 34 / DIN 53515)
ca. 6 N/mm
Glasumwandlungstemperatur (ISO 4663 / DIN 53445)
ca.
-
45°C
Einsatztemperatur
dauerhaft
Kurzfristig
4 Stunden
1 Stunde
-40°C bis +90°C
160°C
180°C
Haltbarkeit (Lagerung unter 25°C im ungeöffneten Gebinde)
12 Monate
1)
23°C / 50% r.Lf.
Beschreibung
Sikaflex
®
-291 ist ein für den Boots-
und Schiffsbau entwickelter, stand-
fe
ster 1-
Komponenten
-
Polyure
-
than
-
Dichtstoff.
Unter Einwirkung der Luft
feuch
-
tigkeit reagiert dieser zu einem
Elastomer.
Sikaflex
®
-291 erfüllt die Anfor-
derungen der Internationalen Mar
i-
timen Organisation (IMO).
Sikafle
x
®
-291 wird nach dem Qu
a-
litätssicherungssystem ISO
9001
/ 14001 und dem Respo
n-
sible Care Pr
o
gramm hergestellt.
Produktvorteile
- 1-
komponentig
-
elastisch
-
geruchsarm
-
alterungs
-
und
witterungsbestä
n
dig
-
nicht korrosiv
-
überlackierbar
-
schleifbar
-
breites Haftspektrum
-
elektrisch nicht leitfähig
-
Meerwasser
-
und Hydrolyse
-
beständig
Anwendungsbereich
Sikaflex
®
-291 ist ein im Boots- und
Schiffsbau vielseitig einsetz
bares
Produkt und dient der Her
stellung
von elastischen und vibrationsb
e-
ständigen Dich
tungs
fugen im I
n-
nen
- und Aussenbereich.
Sika
-
flex
®
-291 verfügt über ein grosses
Haftver
mögen auf den w
e-
sentlichen, im Schiffsbau verwe
n-
deten Materia
len.
Geeignete U
n-
tergründe sind Holz, Metalle, Grun-
die
rungen und Lackierungen (2-K-
Systeme), kera
mi
sche Mate
rialien,
Kunststoffe (UP-GFK etc.). S
i-
kaflex
®
-
291
darf nicht zur Abdic
h-
tung von span
nungs
riss
ge
fähr
-
deten Kunststoffen (wie PMMA,
PC etc.) verwe
n
det werden.
Für Stabdeckverfugung emp
fehlen
wir Sikaflex
®
-290 DC. In erhärt
e-
tem Zustand kann Sika
flex
®
-
291
probl
emlos g
e
schliffen werden.
Härtungsmechanismus
Technical data sheet
Version 12/2005
Sika ex
®
-291
The strongly bonding marine adhesive
Technical characteristics
Chemical basis
1-component polyurethane
Colour
white, black, natural wood
Curing mechanism
cures by absorbing moisture
Density before curing (DIN 53479)
approx. 1.3 kg/l,
depending on colour
Stability
good
Processing temperature
60 min.
Skin formation time
1
Through-curing speed
(see digiagram 1)
Volume change (DIN 52451)
approx. -5%
Shore A hardness (ISO 868 / DIN 53505)
approx. 40
Tensile strength (ISO 527 / DIN 53504)
1.8 N/mm
2
Elongation at break (ISO 527 / DIN 53504)
approx. 400%
Tear propagation resistance (ISO 34 / DIN 53515)
approx. 6 N/mm
Glass transition temperature (ISO 4663 / DIN 53445)
approx. -45°C
Operating temperature sustained
short-term 4 hours
1 hour
-40°C to +90°C
160°C
180°C
Storage life (storage at less than 25°C in unopened containers)
12 months
1)
23°C / 50% r.Lf.
Description
Sika ex
®
291 is a stable 1-compo-
nent polyurethane sealant developed
for boatbuilding and shipbuilding.
On exposure to atmospheric moisture
it reacts to become an elastomer.
Sika ex
®
291 satis ed the require-
ments of the International Maritime
Organisation (IMO).
Sika ex
®
291 is manufactured in ac-
cordance with the ISO 9001/14001
Quality Assurance System and the
Responsible Care Programme.
Product advantages
- 1-component
- exible
- low odour
- resistant to ageing and weather
- non-corrosive
- can be painted over
- can be sanded
- broad bonding spectrum
- electrically non-conductive
- resistant to seawater and hydro-
lysis
Application Range
Sika ex
®
291 is a versatile product for
use in boatbuilding and shipbuilding
to make exible and vibration-resist-
ant seals in internal and external ar-
eas. Sika ex
®
291 has strong bonding
properties to the principal materials
used in shipbuilding. Suitable sub-
strates include wood, metals, prim-
ers and paint nishes (2-component
system), ceramic materials, plastics
(UP-GFK etc.).
Sika ex
®
291 should not be used for
sealing plastics that are subject to
stress cracking (such as PMMA, PC
etc.).
For timber decking we recommend
Sika ex
®
290 DC. In the cured con-
dition, Sika ex
®
291 can be sanded
without problems.
Curing mechanism
36


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