Cartridge 300 mL
Chemical base |
1-component polyurethane
|
|
Colour (CQP001-1) |
White, black, aluminium grey, mahogany
|
|
Cure mechanism |
Moisture-curing |
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Density (uncured) |
depending on colour
|
1.3 kg/L
|
Non-sag properties |
Good |
|
Application temperature |
ambient
|
5 °C ─ 40 °C
|
Skin time (CQP019-1) |
60 minutes A |
|
Open time (CQP526-1) |
45 minutes A |
|
Curing speed (CQP049-1) |
(see diagram) |
|
Shrinkage (CQP014-1) |
5 % |
|
Shore A hardness (CQP023-1 / ISO 48-4) |
40 |
|
Tensile strength (CQP036-1 / ISO 527) |
1.8 MPa |
|
Elongation at break (CQP036-1 / ISO 527) |
500 % |
|
Tear propagation resistance (CQP045-1 / ISO 34) |
6 N/mm |
|
Service temperature (CQP513-1) |
4 hours 1 hour
|
-50 °C ─ 90 °C 160 °C 180 °C
|
Shelf life |
12 months B |
CQP = Corporate Quality Procedure |
A) 23 °C / 50 % r. h. |
B) storage below 25 °C |
Surfaces must be clean, dry and free from grease, oil and dust.
Surface treatment depends on the specific nature of the substrates and is crucial for a long lasting bond. Suggestions for surface preparation may be found on the current edition of the appropriate Sika Pre-treatment Chart for Marine Applications. Consider that these suggestions are based on experience and have in any case to be verified by tests on original substrates.
Sikaflex®-291 can be applied at temperatures between 5 °C and 40 °C but changes in reactivity and application properties have to be taken into considerations. The optimum temperature for substrate and sealant is between 15 °C and 25 °C.
Sikaflex®-291 can be processed with hand, pneumatic or electric driven piston guns as well as pump equipment. For advice on selecting and setting up a suitable pump system, contact the System Engineering Department of Sika Industry.
Tooling and finishing must be carried out within the skin time of the product. It is recommended using Sika® Tooling Agent N. Other finishing agents must be tested for suitability and compatibility prior the use.
Uncured Sikaflex®-291 can be removed from tools and equipment with Sika® Remover-208 or another suitable solvent. Once cured, the material can only be removed mechanically.
Sikaflex®-291 can be best painted after formation of a skin. Painting could be improved by treating the joint surface with Sika® Aktivator-100 or Sika® Aktivator-205 prior to paint process. If the paint requires a baking process (> 80 °C), best performance is achieved by allowing the sealant to fully cure first. All paints have to be tested by carrying preliminary trials under manufacturing conditions.
The elasticity of paints is usually lower than that of sealants. This could lead to cracking of the paint in the joint area.