Sikaflex®-290 DC PRO

Sikaflex®-290 DC PRO

The Professional Deck Caulking Compound

Sikaflex®-290 DC PRO is a 1-component polyurethane based joint sealing compound, specifically formulated for caulking joints in traditional timber marine decking. It exhibits excellent weathering resistance and is therefore well suited for highly exposed open joints within the maritime environment. The sealing compound cures to form a flexible elastomer which allows a fast and easy sanding process.
Sikaflex®-290 DC PRO meets the requirements set out by the International Maritime Organisation (IMO).

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  • Excellent weathering resistance
  • Robust and durable
  • Easy and fast sandable
Sikaflex®-290 DC PRO
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  • Excellent weathering resistance
  • Robust and durable
  • Easy and fast sandable
  • Ideal flow behavior for application
  • Long toolability
  • Unique aspect
  • Resistant to seawater and fresh water

Areas of Application

Sikaflex®-290 DC PRO is designed for caulking of joints in traditional timber decking for boat-, yacht and commercial ship constructions. This product is suitable for experienced professional users only. Test with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.

Product Details

Typical Product Data

Chemical base 1-component polyurethane


Color (CQP001-1) Black
Cure mechanism Moisture-curing
Density (uncured) 1.3 kg/l
Application temperature ambient 5 ─ 35 °C


Skin time (CQP019-1) 90 minutes A
Curing speed (CQP049-1) (see diagram)
Shrinkage (CQP014-1) 3 %
Shore A hardness (CQP023-1 / ISO 48-4) 40
Tensile strength (CQP036-1 / ISO 527) 3 MPa
Elongation at break (CQP036-1 / ISO 527) 600 %
Tear propagation resistance (CQP045-1 / ISO 34) 10 N/mm
Service temperature (CQP513-1) -50 ─ 90 °C


Shelf life (CQP016-1) cartridge /unipack

pail / drum

12 months B

9 months B


CQP = Corporate Quality Procedure A) 23 °C / 50 % r. h. B) storage below 25 °C



Application Information

Surface preparation

Surfaces must be clean, dry and free from grease, oil and dust. In case of timber the use of an adequate Primer, e.g. Sika® Primer-290 DC, is mandatory. Additional surface treatment, for example for deck perimeter sealing, depends on the specific nature of the substrates. Therefore all recommendations must be determined by preliminary tests.



For satisfactory results the adhesive must be applied with adequate equipment such as pump, dosing units or piston operated application guns.
Sikaflex®-290 DC PRO can be processed between 5 °C and 35 °C but changes in reactivity as well as application properties need to be considered. The optimum process temperature (substrates, climate and product) is between 15 °C and 25 °C.


Uncured Sikaflex®-290 DC PRO 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 Sika® Cleaner-350H or a suitable industrial hand cleaner and water. Do not use solvents on skin!



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