Thermal Defence is a water-based heat protectant cream made by Curl Keeper, the Toronto-founded curly hair care brand, designed to shield curls from blow-dryers, diffusers, flat irons, and curling wands.
Unlike many heat protectants built around silicones, this one is silicone-free and formulated with wheat protein, panthenol, and plant extracts including chamomile, horsetail, and kelp, which coat strands to help slow and even out heat exposure.
- Cream texture that combs through thick, dense curls
- Water-based — layers under other curl products without buildup
- Silicone-free formula
Because it's a cream rather than a spray, it needs to be worked through soaking-wet hair before other styling products go on, and the bottle should be shaken before each use since some separation is normal for this formula.