Overview Reviews Product Description The X-5 solid paint marker is recommended where marking temperatures vary rapidly from 150°F to 900°F (66°C to 482°C). This hot surface paint crayon is ideal for very rough surfaces such as open-hearth ingots, forging, hot slabs, and other metals. Markal - TEMPIL - LA-CO Catalog Product Videos Custom Field Product Reviews Write a Review Write a Review × Markal Heat Stik® 150F-900F Hot Surface Paint Crayon - White 82520 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *