What is Cal-Mask 2900 upper temperature limit? Customer wants to use it as stencil for powder coating process.

What is Cal-Mask 2900 upper temperature limit? Customer wants to use it as stencil for powder coating process.

Cal-Mask 2900 has upper temp limit of 170F with no more than 15 min exposure limit. It will not withstand continuous exposures @ 170F. How long does customer plan to have the premask in the oven? What is the powder coating curing temp?