Does a technique with Crackle Tex need to be sealed?

Yes. Seal with Artisan Enhancements™ sealers or wax.

Note: If creating a multi layered finish – adding more layers of paint, plaster, glaze, or a color wash – once crackle layer of paint is dry, a thin layer of Artisan Enhancements™ Clear Topcoat may be needed to protect the crackle paint/plaster layer from reopening with moisture.