Product information "Universal Maintenance Lacquer"
Uses
For the maintenance of high-build glaze coated wood windows and foil-covered UPVC windows in interior and exterior areas.

Characteristics
Waterbased product. Dries quickly, resistant to yellowing. Sheen level: silk gloss.
https://www.koenignorthamerica.com/media/f4/11/f4/1699344499/TDS_514500_Universal-Maintenance-Lacquer_2021-43.pdf