Does Matte Dura-Lar need to be sealed when using mediums such as; colored pencil, pastel, graphite, charcoal or crayons?
It is not necessary to seal the Matte Dura-Lar, but a matter of preference desired outcome and framing plans.
If you choose to seal the Matte Dura-Lar we have some suggestions, but we strongly recommend testing yourself and also reviewing the Manufacturers guidelines for their products.
Spray recommendations:
Krylon Workable Fixative
Krylon Gallery Series Archival Fixative (has UV protection)
Lascaux Fixative
Varnish recommendations:
Sennelier Matte UV Protection
Krylon UV Protectant
Acrylic Gel Medium