Can it be spayed indoors with no open windows?

I would recommend not doing that. It's poison.... I would even venture to say that the only time it is safe to spray poison in a home with no windows open is never...or perhaps if you have no walls or a roof. Even then you may be pushing your luck.

Can I use this outside on a brick house?

Hello, Thank you for your question. We recommend using this product around the base of the foundation of your house. Best, John

Is this product any good for moth infestations?

Doubtful. It’s pretty specific to only the Asian lady beetles, where it’s very effective.

Do you need to keep spraying? How long does an application last?

I've only sprayed it once for far and it's been two months or more since I initially did it. There's enough in there for multiple sprays if needed though, so it should last you quite a long time.

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HARRISAsian Lady Beetle, Japanese Beetle, and Box Elder Killer, Liquid Spray with Odorless and Non-Staining Extended Residual Kill Formula (Gallon)

HARRISAsian Lady Beetle, Japanese Beetle, and Box Elder Killer, Liquid Spray with Odorless and Non-Staining Extended Residual Kill Formula (Gallon)

Product ID: 69665537

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Details

Item Form
Spray
Item Weight
8.8 Pounds
Liquid Volume
128 Fluid
Active Ingredients
Deltamethrin
Brand
HARRIS

⏳Weeks-long residual kill

🌿Odorless & non-staining

💧128 fl oz powerful liquid

Description

🚫🐞 Say goodbye to beetles—keep your space pest-free with confidence!

GENEROUS GALLON SIZE - 128 fluid ounces for multiple applications—perfect for ongoing pest control without constant repurchasing.
ODORLESS FABRIC SAFE - Non-staining, odorless formula that won’t damage your home’s fabrics or leave unpleasant smells.
LONG LASTING PEST DEFENSE - Kills Asian lady beetles & Japanese beetles even after spray dries, ensuring weeks of protection.
EPA REGISTERED RELIABILITY - Backed by EPA registration (No. 3-11) for safe, trusted residential use since 1922.
EXTENDED TRIGGER SPRAYER INCLUDED - Ergonomic sprayer for precise, easy application exactly where pests hide.

Harris Asian Lady Beetle, Japanese Beetle, and Box Elder Killer is a 128 fl oz liquid spray featuring an odorless, non-staining formula with deltamethrin active ingredient. EPA-registered and trusted since 1922, it offers extended residual kill lasting weeks after application, delivered via an included trigger sprayer for effective, repeated pest control in residential settings.