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).

This product is suitable for experienced professional users only

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• Features & Benefits
• Areas of Application
• Cure Mechanism
• Chemical Resistance
• Method of Application
• Further Information
• Typical Product Data

Features & Benefits

• This product is suitable for experienced professional users only
• 1-component polyurethane based joint sealing compound
• Specifically formulated for caulking joints in traditional timber marine decking
• Well suited for highly exposed open joints within the maritime environment
• 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
• Meets the requirements set out by the International Maritime Organisation (IMO)

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.

Cure Mechanism

Sikaflex-290 DC PRO 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 in the product data sheet).

Chemical Resistance

Sikaflex-290 DC PRO offers effective long-term resistance to fresh water, seawater and mild aqueous cleaning agents. The sealant is not resistant to solvents, acids, caustic solutions and chlorine containing cleaners. A brief contact with fuels or lubricants has no significant effect on the durability of the sealant.

Method of Application

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.

Application

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.

Removal

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!

Further Information

The information herein is offered for general guidance only. Advice on specific applications is available on request from our technical team on 0113 2455450 (option 2) or send a message to [email protected].

It is highly recommended using the Sika Teak Maintenance System composed of Sika Teak C+B and Sika Teak Oil to preserve the teak deck.

Copies of the following publications are available on request:

• Sika Marine Application Guide
• Sika Pre-Treatment Chart
• For Marine Applications
• General Guidelines
• Bonding and Sealing with Sikaflex

Typical Product Data

For further values, please refer to the safety data sheet.

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