What is a good termite killer spray?

A good termite killer spray depends on whether you are targeting subterranean termites around the foundation or drywood termites inside wood, but professional-grade non-repellent termiticides are considered most effective for lasting colony elimination rather than repellent hardware store sprays. For subterranean termites, the best termite killer sprays used by professionals include Termidor SC which contains fipronil, a non-repellent chemical that termites cannot detect and carry back to the colony on their bodies spreading it through grooming and feeding, killing within days and eliminating colonies within 30 to 90 days, and Taurus SC which also contains fipronil and is a more affordable generic version. Other good professional sprays include Premise 2 containing imidacloprid and Dominion 2L which are also non-repellent and effective as liquid barriers when trenching around foundation. For drywood termites inside wood, good killer sprays include Bora-Care which contains borate that penetrates wood and kills termites that ingest treated wood and provides long-term prevention, and orange oil sprays containing d-limonene like XT-2000 that kill on direct contact when injected into galleries. For DIY spot use, Spectracide Terminate and BioAdvanced Termite Killer are available at hardware stores but have limited reach and are repellent so they may cause budding. Always follow label directions, wear protective gear, and avoid spraying near water sources. For active structural infestations, hiring a licensed professional for liquid barrier or bait system costing $1,000 to $3,000 is recommended over spray alone because colonies have millions of members underground.