Interlux Inter-Prime Wood Sealer. Specially formulated to seal the grain and stop varnish from soaking into the wood, allowing future coats of varnish or paint to dry without high and low spots. Good for sealing plywood to resist cracking and checking. Suitable for interior or exterior use. For use above the waterline. Can be applied by spray, brush or roller. Gloss finish. Clear. Quart.