Sika® Primer-290 DC is a solvent-based primer suitable for experienced professional users only. The colourless to slightly yellow primer reacts with moisture to form a thin layer, acting as a link between substrates and adhesive/sealant.

This primer is designed for the treatment of timber decking strips prior to caulking with Sikaflex®-290 DC or bonding with Sikaflex®-298. It improves adhesion on teak, mahogany, Oregon pine and GRP based on polyester.

PLEASE NOTE: Before application, the substrate 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.

The user should seek manufacturer's advice and perform tests on original substrates before using Sika® Primer-290 DC on materials prone to stress cracking.