Sikaflex®-290 DC PRO
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).
- 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
PRODUCT BENEFITS
- 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
| 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 | 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 |
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 1).
Diagram 1: Curing speed for Sikaflex®-290 DC PRO
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.
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!
FAQ
To maintain the color and appearance of a new teak deck we recommend Sika’s Teak Maintenance System. It avoids damage of the caulking joint and is fully compatible with the Sikaflex®-290 DC PRO caulked teak decks.
Step 1:
Mix SikaTeak® C+B with water in a ratio of 1:3
Apply the mixture with a scrubbing brush or sponge
Leave for 10 minutes before rinsing the deck with water
Step 2:
Apply a small amount of SikaTeak® Oil Neutral on a clean cloth or a roller
Allow oil to penetrate the wood for ca. 30 minutes before removing excesses with a cloth
For further details read our application guidelines and our pre-treatment chart.
To replace damaged teak planks from the deck first completely remove the caulking from the joints around any planks that are to be removed.
Remove the damaged plank, taking care not to damage the substrate.
Remove any old adhesives, bedding or other foreign matter from the substrate and remove the jointing material from around the edge of neighbouring planks.
Use Sikaflex®-298 as a bedding compound and pre-treat the teak planks with Sika® Multiprimer Marine or Sika® Primer-290 DC prior to the application according (check pre-treatment chart). Caulk the joints with Sikaflex®-290 DC PRO the teak deck caulking material. Sand deck with a belt sander or flat plate after safe sanding time as indicated in the guideline.
For further details read our application guidelines and our pre-treatment chart.
To ensure a good result after applying your teak deck download the application guideline and follow instructions thoroughly. As surface preparation is key to remove and to clean the surface of dust, dirt, grease, oil, etc. Prepare substrate according to pre-treatment chart.
For the next step, we recommend to use the bedding compound Sikaflex®-298 and to pre-treat the wood plank prior to embedding use Sika® Primer-290 DC or Sika® Multiprimer Marine. After placing the planks into position caulk the joints with Sikaflex®-290 DC PRO, Sika’s teak deck caulking material. Sand deck with a belt sander or flat plate after safe sanding time as indicated in the guidelines.
For further details read our application guidelines and our pre-treatment chart.