Okay, top seam is sealed. Unscented talcum powder purchased. I will get it up and some pictures taken tomorrow. Weather permitting..............just kidding.
About the Cuben tape. Joe advised me not to use it saying that it can delaminate and leave a mess. He said he guaranteed the seam for the life of the tarp. Stating he would repair or replace the tarp if the seam failed. He said he would not honor the guarantee if I taped it.