I had a customer ask me the other day if I knew of a product that would keep pests(Roaches/water bugs) from coming into her house. Her neighbor has been known to have roaches/water bugs frequently. She has an exterminator come quarterly but she wanted to know if I new of a granular product that repels them from coming inside like a barrier. I guess she means to put on the lawn and mulched beds around the house. I don't do apps but she just wanted some advice. Anyone ever run into this?