Sika® Primer-290 DC
Sika® Primer-290 DC is a solvent-based colorless to slightly yellow primer, which reacts with moisture and forms a thin layer. This layer acts as a link between substrates and adhesive/sealant. Sika® Primer-290 DC is specifically formulated for the treatment of timber decking strips prior to caulking with Sikaflex®-290 DC or bonding with Sikaflex®-298.
Areas of ApplicationSika® Primer-290 DC is used to improve adhesion on Teak, Mahogany, Oregon pine and GRP based on polyester.
Seek manufacturer’s advice and perform tests on original substrates before using Sika® Primer-290 DC on materials prone to stress cracking.
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.
Solvent-based Polyurethane solution
Colorless, slightly yellow
5 ─ 40 °C
Brush or spray
depending on substrate porosity
≥ 15 °C
< 15 °C
|Shelf life (CQP016-1)|
12 months A
CQP = Corporate Quality Procedure
A) stored in sealed container in up-right position in a dry place at ≤ 25 °C
Sika® Primer-290 DC is a moisture reactive system. In order to maintain product quality it is important to reseal the container with the inner plastic liner immediately after use. Once the surface pre-treatment operation is completed, the cap has to be screwed on.
Dispose of product approx. one month after opening if used frequently or after two months in case of infrequent use.
30 ml cans are for single application only.
If gelling, separation or a significant increase in viscosity is noted, discard the primer immediately.
Never dilute or mix this product with any other substances.
If used on transparent or translucent substrates such as plastics, etc., an adequate UV protection is mandatory.
METHOD OF APPLICATION
Surfaces must be clean, dry and free from grease, oil, dust and contaminants.
Adhesion on substrates may be improved by adding and/or combining pre-treatment processes such as scuffing and cleaning.
Apply a thin but covering coat of Sika® Primer-290 DC with a clean, dry brush.
Be sure that the teak is completely covered by the primer but avoid excess of material.
Primed surfaces should be left for a minimum of 60 minutes before sealing or bonding with Sikaflex® products.
In case of spray application contact the Technical Department of Sika Industry.
Ideal application and surface temperature are between 15 °C and 25 °C.
Sika® Primer-290 DC has to be applied once only. Care must be taken to ensure that this single application gives adequately dense coverage. Consumption and method of application depend on the specific nature of the substrates. Tightly reseal container immediately after each use.
For advice on selecting and setting up a suitable spray equipment, contact the System Engineering Department of Sika Industry.