SUMPRODUCT and MAX doesnt find me a negative value

i want to find the highest number in a range which , but it should be less than 10.
i am using the formula : =SUMPRODUCT(MAX((B1:B18<10)*B1:B18))

But the problem is the highest value in the range below 10 is -4 , which this formula is unable to find. It returns the value as 0.

thanks