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Carnation
Carnation

Wood Preservative Red

Behr 1-gal. Redwood Oil-Latex Stain 

Wood Preservative Red Behr 

http://www.homedepot.com/p/BEHR-1-gal-Redwood-Oil-Latex-Stain-00901/100184240         $9.58 

This is low cost and seems to work well.  Cleans with water.