Heat Reflectant Paint
Different Names
When a paint is referred to as heat reflectant (with an 'a') or reflectent (with an 'e') as opposed to heat reflective, there is no difference in the implications to the product.
It's just poor grammar, as the word has been invented. Reflectant is actually a Dutch word that means 'applicant', or 'candidate'.
So while the correct word to use would be reflective, this doesn't rule out a product which is referred to as heat reflectant. What does rule a product out, or in, is it's
SRI - Solar Reflectance Index.