Thomas G. Marshall wrote:
A friend of mine has purchased enough of Dow Symmatrix for a fairly large
sized deck. Grey color which is officially called "driftwood" apparently.

It is yellowing in the sun while sitting in the driveway. Almost to the
same yellow that old newspaper gets after a few decades out in the open.

The salesman told her words to the effect of "That's an industry wide
problem with gray composites: they yellow due to the tannin within the wood
particles but it'll fade back to gray in a week."

Seems sketchy to me.

It's been a few weeks and it's only staying yellow.

Has anyone seen this? My composite decking was Rhino Deck, and it faded
just fine from brown to light light brown with no yellowing---not much
information for my friend but it was the only comparison I had.

Any suggestions? She's nervous enough to return the entire thing.

Assuming there is a warrenty on the product I would send the company a
letter confirming the salesmans comments and wait a week or two. If the
stuff goes to an acceptable color then all is well, if not then you
need to arrange a return,

In my opinion if this is a known issue then the customer should be
advised of it. I would hate to have a half built deck that turned a
urine yellow color...it would freak me right out.