I am considering using VHB for an exterior signage project I have in Texas. Most signage ranges from .5/lb to 10/lb to be mounted on concrete, metal and wood.

I have looked at the spec sheets for certain exterior rated VHB and it appears the shear strength is and temperature ratings are well beyond my needs, but has there been any longterm testing as far durability? On a 5-10 year scale in extreme variables of heat, cold and humidity? Is there any warranty?

Furthermore, I have seen on some forums that suggest sealing the perimeter of the signs with silicone. Has this