3m VHB for polymetal/angle iron sign sign

[Carl Crabtree]

I'm getting ready to build a 5'x14' monument type sign. What is the best 3m VHB tape to use to attach polymetal to angle iron? Thanks in advance!

 

[J Hill Designs]

the grey stuff I would think...Thats a big sign for no mech. fasteners, tho...I would add LORDS 406/19 if mech fasteners are out of the question design-wise...