We just moved to a new house. It is 2 years old and has a deck that looks like it was made from treated lumber but never stained and sealed. We received several estimates, most in the same range, except for one which was double the price. They claimed that their product would seal the deck and it would last for the life of the deck. It is from Sealwize and the product is Zerovoc. I have looked for reviews on this product, for I fear it is too good to be true, but haven't found any. Anyone know anything about this product or could anyone make any recommenations?