Novalk NFH15900 is a one-component (1K) acid curing clear sealer, specifically recommended for sealing massive wood or veneered substrates. This fast-curing product is easy to sand, providing an efficient solution for substrate preparation. As a pre-catalyzed product, NFH15900 requires only reduction with ND5101 (fast thinner) or ND5920 (slower) at 20-40% by volume. For additional hardness/curing speed, 2% to 5% of acid catalyst NCH999 can be added to the product. This acid curing clear sealer ensures a quick and reliable foundation for various wood applications.