Easy to use product with professional results. I previously tried an expensive epoxy based product that was difficult to apply and looked so bad that I thought I’d have to remove the grout. I spoke with Mike and he suggested that I apply the GroutShields stripper (at a higher concentration than normally used) followed by the color sealant. I am not particularly handy but the GroutShields products were easy to apply and have restored my shower floor to its original appearance. Customer support was fantastic – I received a follow-up call to see if I needed additional help. Highly recommended.