Yes, you can use Olaplex with heat. You can use your Olaplex hair treatment with heat as long as it is checked every 3 to 5 minutes.
You must do so because heat works like a catalyst on Olaplex as it will tend to speed up the chemical reaction. If your hair is compromised, it is advisable not to use heat at all until the health, integrity, and strength of your hair are restored through a reparative system. This is as advised by Olaplex.