Unlike moist top-coat sealers that trap water vapor below the surface,MARINE uses proprietary nanotechnology to penetrate beneath the surfaceof wood, coating the wood fibers at the cellular level.This advanced nano-particle technology of MARINE allows it to form asuperior barrier below the surface, protecting from the inside out.MARINE forms a flexible, breathable barrier that allows the wood toexpand and contractMARINE allows wood to age naturally without decay, and can be used to preserve old or new wood, extending its natural life.It is non-film forming and will not alter the natural beauty of thewood. It will not harm people, pets or plants & can be appliedaround or over open water, without harming marine lifeMARINE can also be used as a wood stain and is available in 11 colortints that can be added to the clear formula to enhance the naturalgrain of wood.