Care Seal Precatalyzed Sealer is a precatalyzed, nitrocellulose, vinyl modified, clear sealer for interior woodwork. This sealer has added U.V. absorber, making it a great option for light colored wood substrates. Care Seal Precatalyzed Sealer is fast drying and has excellent sandability. It is a HAPS free sealer for use under recommended AcromaPro acid cured, precatalyzed clear topcoats.