Some highly rated deck stain products are Behr Waterproofing Wood Stain, Sikkens Cetol SRD Semi-transparent Stain and Thompson's WaterSeal Deck & House, according to Consumer Search.
Behr waterproofing stain gets high marks from both homeowners and professionals. The stain is easy to apply and is long lasting, although some users complain that it starts to peel after only about six months. It is unusual in that it resists both mildew and stains and is very esthetically pleasing once applied.
Sikkens semi-transparent stain is also a top pick. It lasts longer than other stains and penetrates the wood, but it is expensive. Reviewers appreciate Thompson's stain for its ease of application and long life.