Need Help Problem with 3M Matte Black Controltac

[bERT bRYAN]

Hey guys new member here. 2 times lately I've had problems after using 3M matte black controltac. One time I lettered a flat poly carb face, and another time I lettered a poly carb pan face. Both times it was full coverage with reverse weed lettering. Both faces bubbled up like crazy after 2 or 3 weeks. I cleaned both with 70% alcohol, layed the vinyl dry. The pan face was facing south and catching a lot of sun, but the matching one was facing north and did not bubble up. It was almost like the poly carb was out gassing. Has anybody else had this problem?

 

[letterman7]

Polycarb does outgas. Were they fresh new faces?

 

[Christian @ 2CT Media]

Unless treated, polycarbonate is hydroscopic. So full coverage non permeable films will bubble especially if there is a heat source behind it.

 

[bERT bRYAN]

Polycarb does outgas. Were they fresh new faces?

Yes they were new faces straight from the supplier. Do you have to give them some cure time possibly?

 

[MikePro]

+1 hydroscopic polycarb. its a curse really.

 

[bERT bRYAN]

Unless treated, polycarbonate is hydroscopic. So full coverage non permeable films will bubble especially if there is a heat source behind it.

Oh wow, I never knew that about Polycarbonate. Is there a way to treat them to avoid this? And I've never had this problem with translucent, is it a permeable vinyl as opposed to the matte black controltac I've been using?