Dyebrick color stain for brick and mortar (www.dyebrick.com)

Has anyone used this product, known anyone or has any experince of it.
Just moved home and the new property (circa 1960) has had a 14'x14' kitchen extension built on the back using common brick (orange colour), the problem is that the house is built with Rustic multi (think this is the correct term).
So Iam looking to try and get some sort of colour match between the two.


Any other products to try and use would be gratefully appreciated.

Thanks in advance.

Mark