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Sikaflex-296, Direct Glazing Adhesive for Marine Glass, Exterior, Black, 600 mL

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SIKA

Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.

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Direct glazing adhesive for glass windows in the ship building industry

Sikaflex-296 is a high performance elastic gap-filling 1-C polyurethane direct glazing adhesive that cures on exposure to atmospheric moisture. It is suitable for almost all kind of minearal glazing application in the ship building industry.
Sikaflex-296 meets the regulations set out by the International Maritime Organization (IMO).  

  • Resistant to ageing and weathering
  • Excellent working characteristics
  • Solvent- and PVC-free
  • Low odour
  • Suitable for manual and pump applications
  • Black primerless application possible
  • Wheelmark approved
PRODUCT BENEFITS
  • Resistant to ageing and weathering
  • Excellent working characteristics
  • Solvent- and PVC-free
  • Low odour
  • Suitable for manual and pump applications
  • Black primerless application possible
  • Wheelmark approved
 
Usage
Sikaflex-296 is designed for direct glazing applications in both the OEM and repair Marine markets. It is suitable for use with all types of mineral glass-based windows used in Marine. Before installing laminated safety glasses, which incorporate heating elements in the PVB sandwich layer, contact Sika’s Technical Service Department for advice. Sikaflex-296 can be tooled to a very fine finish and is suitable for exposed joints. Seek manufacturer’s advice and perform tests on original substrates before using Sikaflex-296 on materials prone to stress cracking. Sikaflex-296 is suitable for experienced professional users only. Test with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.  
Packaging

Unipack

600 ml

Typical Product Data
Chemical base

1-component polyurethane

Colour (CQP001-1)

Black

Cure mechanism

Moisture-curing

Density (uncured)

1.2 kg/l

Non-sag properties

Very good

Application temperatureambient

10 ─ 35 °C

Skin time (CQP019-1)

45 minutes A

Open time (CQP526-1)

30 minutes A

Curing speed (CQP049-1)

See diagram 1

Shrinkage (CQP014-1)

1 %

Shore A hardness (CQP023-1 / ISO 48-4)

45

Tensile strength (CQP036-1 / ISO 527)

6 MPa

Elongation at break (CQP036-1 / ISO 527)

450 %

Tear propagation resistance (CQP045-1 / ISO 34)

14 N/mm

Tensile lap-shear strength (CQP046-1 / ISO 4587)

4.5 MPa

Insulation resistance (CQP079-2 / DIN IEC 60167)

108 Ω cm

Service temperature (CQP509-1 / CQP513-1)

-40 ─ 90 °C

Shelf lifecartridge / unipackdrum / pail

9 months B

6 months B

CQP = Corporate Quality ProcedureA)23 °C / 50 % r. h. B)storage below 25 °C
Technical Information
CURE MECHANISM

Sikaflex-296 cures by reaction with atmospheric moisture. At low temperatures the water content of the air is generally lower and the curing reaction proceeds somewhat slower (see diagram 1).

en_PNG_01-en-sikaflex-296-v18-08-final

Diagram 1: Curing speed Sikaflex-296

CHEMICAL RESISTANCE

Sikaflex-296 is generally resistant to fresh water, seawater, diluted acids and diluted caustic solutions; temporarily resistant to fuels, mineral oils, vegetable and animal fats and oils; not resistant to organic acids, glycolic alcohol, concentrated mineral acids and caustic solutions or solvents.

Application Information
Surface Preparation

Surfaces must be clean, dry and free from grease, oil, dust and contaminants.
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. Consider that these suggestions are based on experience and have in any case to be verified by tests on original substrates.

Application

Sikaflex-296 can be processed between 10 and 35 °C (climate and product) but changes in reactivity and application properties have to be considered. The optimum temperature for substrate and adhesive is between 15 °C and 25 °C.Consider the viscosity increase at low temperature. For easy application, condition the adhesive at ambient temperature prior to use.

 

To ensure a uniform thickness of the bondline it is recommend to apply the adhesive in form of a triangular bead (see figure 1).

01-en-triangular-bead-oval-1000

Figure 1: Recommended bead configuration

 

Sikaflex-296 can be processed with hand, pneumatic or electric driven piston guns as well as pump equipment. The open time is significantly shorter in hot and humid climate. The glass must always be installed within the open time. Never join bonding parts if the adhesive has built a skin.

For advice on selecting and setting up a suitable pump system, contact the System Engineering Department of Sika Industry.

Tooling and finishing

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.

Removal

Uncured Sikaflex-296 can be removed from tools and equipment with Sika Remover-208 or another suitable solvent. Once cured, the material can only be removed mechanically. Hands and exposed skin have to be washed immediately using hand wipes such as Sika Cleaner-350H or a suitable industrial hand cleaner and water.

Do not use solvents on skin!