Sevin Insect Killer Concentrate and Sevin Insect Killer Ready to Spray are non-staining formulations that can be used on plants, trees, soil and lawns, and on building foundations up to a maximum height of 3 feet. Limit other outdoor applications of these products to spot or crack-and-crevice treatments, as instructed on the product labels. Non-staining Sevin Insect Killer Ready to Use2 can also be used on outdoor surfaces such as patios, decks and around windows as instructed on the product label. Used according to label instructions, these products will not stain most home siding, but it is recommended to test a small area of siding first.