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Thanks Dave, we'll give that a try. Sean

What is your final overall size going to be? You can buy poly in rolls up to 100" tall and 400 feet long? Is it going to be illuminated? If it is I think there will always be, upon close scrutiny, a visible seam. Dave Thanks for you quick response... These are 10' tall, internally LED illuminated channel letters with many of them over 100" wide, so seams are required in some places. The white poly has 1st surface vinyl. We would like the seams to be as imperceptible as possible. We are gluing the seams now with a clear backup and getting a 'smudged' result when illuminated. Would appreciate any better ideas. Thanks, Sean

I am looking for ideas on seaming polycarbonate (Lexan) faces with clean, invisible results. I would appreciate any ideas. Thanks, Sean