What is the working time? Monica P. December 02, 2020 15:51 Updated The work time is 25-30 min Related articles Have you performed any experiments that prove no/little yellowing over time? What is the ProArt heat resistance? Does it contain both HALS and UV stabilizers for UV protection against yellowing? Can I use a brush to spread this product or does it have to be poured? Using a torch or heat gun to remove resin bubbles… Comments 0 comments Article is closed for comments.