I have some extensive pre-wiring to do in and around a very ornate hardscape. I need to be running wire up knee walls that will have a rubble stone veneer applied to them. As there is so much mortar used in rubble wall construction I want to be able to protect the wire jacket from the lime in the mortar. Do you know of a small dia. flexible, thin wall tubing or conduit that I can use for this application. I checked in at HD and found 1/2 poly pipe, but it is too thick and rigid for the application. Thanks.