431-1961 Optiseal 550 Pre-Cat Clear Sealer

Optiseal 550 is recommended for office and household furniture, kitchen cabinets, as well as many other interior wood applications.

Substrate must be sanded using 120, 150 or 180 grit stearated paper prior to staining or coating. The sealer should be sanded and the next coat applied within eight hours of being sanded. Optiseal 550 cannot be used on metal, old oil or cellulose lacquers. Stain systems used under acid catalyzed systems should be acid stable. Optiseal 550 may be topcoated with pre-catalyzed RAC topcoats such as Opticlear 550 topcoat 431 85XX. AkzoNobel recommends using 825-00XX or 825-09XX series stains or 824-50XX series waterborne stains.

Agitate material before use.  Optiseal 550 must be agitated thoroughly at all times to ensure product consistency and consistent gloss.  Always mix Optiseal 550 while adding hardener and reducers in the recommended mixing ratios.

Apply at 3-5 mils wet on sanded substrate.  Further coats may be applied after complete drying followed by sanding with 280/320 grit stearated paper.  The second and subsequent coats must be applied the same day as the previous coat is sanded.

Maximum film build of Optiseal 550 should not exceed 2 mils dry.  Maximum film build of total coating system must not exceed 3 mils dry.  Contact with metal surfaces should be avoided.

Please note that, as with any other pre-catalyzed product, this material contains, and has the potential to emit, formaldehyde (CAS# 50-00-0). As per the US Department of Labor Standard 29 CFR 1910.1048 covering formaldehyde, section (d)(1)(i) states that “Each employer who has a workplace covered by this standard shall monitor employees to determine their exposure to formaldehyde.” Please refer to the OSHA web site at www.osha.gov for further information.

Optiseal 550 must not be polluted with oil, varnish or the like and must not be sanded with steel wool between the coats.  Optiseal 550 must not be used and dried at temperatures below 64°F or relative humidity above 65%.  During hardening the coating must not be exposed to ammonia vapors.  Ammonia cleaners should not be used for cleaning the finished surface.  This may accelerate discoloration.