Will be replacing the cut section in below:

Note the use of the white, plastic, expansion strips already present.
I can't find out who the original contractor is to do this or to find out what he used (he was a sub and pool company out of business). I think I found a product that is similar if not the same:

It is from:
http://www.stegmeier.com/index.php?o...=92&Itemid=120
They call it:"Frontier Deck Joint . Frontier Deck Joint is an extruded PVC deck joint material available in 12 foot lengths. This product is placed into freshly poured concrete to create an effective weakened plane. Frontier Deck Joint's design features "T" members that provide a water stop. If a full expansion is necessary, or a detailed pattern is desired, use Frontier Deck Joints in combination with Frontier Rigid Hold."
The item is .6" wide x 1.3" high. If I use the Frontier Rigid Hold:

, it is same width and 3" high.
Aside from how it might look (perhaps odd), which, if either system, should I use?
Since it is around a pool, I am thinking this plastic stuff will protect toes/feet from a raw concrete edge. I could use a rounding-over masonary edging tool but that also might look a bit odd since it would be the only place in the pool area where that treatment would be used.
I know this is a 1st world problem, but I've come this far and don't want to screw it up!
TIA for any advice.

Note the use of the white, plastic, expansion strips already present.
I can't find out who the original contractor is to do this or to find out what he used (he was a sub and pool company out of business). I think I found a product that is similar if not the same:

It is from:
http://www.stegmeier.com/index.php?o...=92&Itemid=120
They call it:"Frontier Deck Joint . Frontier Deck Joint is an extruded PVC deck joint material available in 12 foot lengths. This product is placed into freshly poured concrete to create an effective weakened plane. Frontier Deck Joint's design features "T" members that provide a water stop. If a full expansion is necessary, or a detailed pattern is desired, use Frontier Deck Joints in combination with Frontier Rigid Hold."
The item is .6" wide x 1.3" high. If I use the Frontier Rigid Hold:

, it is same width and 3" high.
Aside from how it might look (perhaps odd), which, if either system, should I use?
Since it is around a pool, I am thinking this plastic stuff will protect toes/feet from a raw concrete edge. I could use a rounding-over masonary edging tool but that also might look a bit odd since it would be the only place in the pool area where that treatment would be used.
I know this is a 1st world problem, but I've come this far and don't want to screw it up!
TIA for any advice.