Clean & Seal Pressure-Treated Deck?

We have 2 new decks made of pressure-treated Hem-Fir 2x6. Both are under cover, but get direct sun for a few hours per day. The decks are unfinished. One has a stains on it from mortar used for a stone skirt on the wall.
I would like to clean and seal the wood, and have 2 questions:
1) What product do you recommend for cleaning mortar residue off unfinished pressure treated wood?
2) What product do you recommend for sealing the pressure treated deck planks?
Thanks,
Rick
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1. Mortar "residue" means nothing to me...what EXACTLY are you talking about?
2. "sealing" is an annual chore...Thompsons and such require re-doing every year. Semi transparent stain however will protect and beautify for 5 years or more.
You do the math.

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snipped-for-privacy@nospam.com says...

A white, chalky stain or ??? left on the wood where the stone mason spilled mortar.

I was told there'd be no math! Can I use a calculator?
;-)
Rick
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