High solid water-based sealer, special for protecting the ends of beams, poles and other wooden structures exposed to humidity and weathering. Also suitable for sealing longitudinal cracks. It prevents the penetration of moisture into the wood, preventing the formation of mold and thus extending the life of the protective coating and of the product in general. Transparent, it has excellent resistance to UV rays. The product can be colored with Waterbased Pigments. Apply as a first product or as an intermediate in the case of traditional water or solvent-based finishing cycles. Apply as a last product in the case of oil finishing cycles, to allow this material to penetrate into the wood.