Carpenter bees chew round holes into fascia boards, deck rails, and unfinished timber, then return each spring to widen their tunnels. You spot the sawdust piles first, then the fat yellow-and-black bees hovering near eaves and porch beams. Treating the burrows at the right time stops damage before it spreads across the wood. The picks below match different yard sizes, ladder heights, and tolerance for repeat treatments.
The Main Contenders
Raid Wasp and Hornet Killer 17.5 OZ
SpectracidePRO Wasp & Hornet Killer 18 Oz
Spectracide Wasp & Hornet Killer 18.5 Oz Twin Pack
Raid Wasp & Hornet Killer 17.5 Oz 5-Pack
A Deeper Look At The Lineup
The single-can Raid is the familiar yellow-and-black can most folks keep on the garage shelf, and for good reason. It targets wasps and hornets on contact, then leaves a residual film that keeps new arrivals from rebuilding in the same spot. For homeowners staring at a few fresh bee holes in a porch beam, one can is usually plenty for a single treatment pass.
You won’t get the long-distance jet reach that dedicated pro cans offer, so direct application works best when the burrow is reachable from a step stool. The trade-off is a simpler, more forgiving spray pattern that beginners tend to handle without much fuss.
Useful Touches
- Kills on contact and leaves a residual barrier on treated wood surfaces for returning pests.
- Compact 17.5-ounce can fits in one hand and stores flat on a garage shelf.
- Straightforward nozzle pattern suits homeowners who have never used a jet spray before.
- Targets multiple stinging insects in one pass, useful if wasps have moved into the same timber.
Worth Noting
- Shorter spray distance means you’ll need a ladder for burrows above a single story.
- One can runs out fast across a property with multiple nest sites, so plan on backup cans.
- Standard outdoor aerosol cans tend to lose pressure slowly in storage, so check the nozzle before each season.
Who It Suits Best
First-time users with a single low burrow and no interest in climbing a tall ladder.
Consider Something Else When
You spot burrows high under a second-story eave, where the SpectracidePRO Wasp & Hornet Killer 18 Oz reaches further without a ladder.
SpectracidePRO is the upgrade pick for people whose carpenter bee damage lives above head height. The jet nozzle throws a wet stream up to 20 feet, which means you can treat a burrow under a porch roofline without hauling out the extension ladder. It’s a noticeable step up from the single-can Raid above, both in throw distance and in the residual window.
The label states the spray keeps killing returning wasps and hornets for up to four weeks after application. Dielectric breakdown voltage, the electrical resistance rating of the spray, sits at 47,300 volts, which lets you treat nests near outdoor light fixtures without the same worry as a plain water-based spray. That’s a meaningful detail for anyone working around soffit wiring.
Practical Advantages
- 20-foot jet stream reaches second-story eaves from the ground, cutting ladder time.
- Residual action continues killing returning insects for up to four weeks per the label.
- Dielectric breakdown voltage of 47,300 volts makes it safer to use near outdoor wiring.
- Covers wasps, hornets, yellow jackets, and mud daubers in one can.
Points To Note
- Designed for outdoor use only, so it can’t double as an indoor garage treatment.
- Label advises waiting at least 24 hours before knocking down a treated nest.
- One can is the only included unit, so multi-nest properties need extras on hand.
Quick Facts
Made For
Homeowners with burrows under tall eaves, soffits, or detached garage rooflines.
Look Elsewhere When
You need multiple cans for a property-wide pass, where the Spectracide Wasp & Hornet Killer 18.5 Oz Twin Pack offers two cans in one order.
This twin pack from Spectracide targets a wider pest list than most wasp-and-hornet sprays, which makes it the better fit when carpenter bees are sharing wood with ants, scorpions, or tent caterpillars. Two cans in the box means you can treat the deck today and the shed next weekend without running back to the store.
The 18.5-ounce cans sit between the single Raid and the pro 18-ounce in size, and the active profile handles mud daubers and yellowjackets alongside the usual targets. For properties with two or three active burrows, the second can earns its place by removing the panic-buy after the first one empties mid-treatment.
A Few Highlights
- Two 18.5-ounce cans in one order, useful when burrows show up across multiple structures.
- Targets wasps, hornets, yellowjackets, tent caterpillars, scorpions, and ants.
- Larger total volume than the single-can Raid, easing the pressure on multi-nest days.
- Same trusted Spectracide chemistry as the pro version above.
Honest Caveats
- No jet-spray distance is published on this listing, so reach will be shorter than the SpectracidePRO can.
- Label still calls for a 24-hour wait before knocking down a treated nest.
- Two cans take up more shelf space than a single can over the off-season.
Best Suited To
Shoppers managing two or three burrows across a yard who want spare cans ready without a second order.
A Better Fit Elsewhere
High eave burrows where jet reach matters more than extra cans, in which case the SpectracidePRO Wasp & Hornet Killer 18 Oz covers that scenario.
The bulk Raid five-pack is the workhorse option for properties with widespread carpenter bee pressure. Five cans go further than any single-can on this list, which matters when the same wood attracts new burrows every spring. You also get the longest published jet reach of any pick in the lineup at 22 feet.
The cans are smaller at 17.5 ounces each, but the throw distance beats both the standard Raid and the Spectracide twin pack. For tall rooflines and barn-style structures, that extra reach keeps your feet on the ground more often than not.
Key Advantages
- 22-foot jet throw is the longest in this lineup, helpful for barn roofs and two-story peaks.
- Five cans suit a full spring treatment plus reserve cans for the rest of the season.
- Kills on contact and keeps working on returning insects per the label.
- Raid chemistry most homeowners already recognize and trust for stinging pests.
Things To Consider
- Smaller 17.5-ounce cans empty faster than the 18-ounce SpectracidePRO during heavy use.
- Five cans add real shelf bulk, so you’ll want a cool, dry storage spot.
- More cans than a single-nest property typically needs, which leaves extras for next season.
Quick Facts
Perfect Match For
Owners of larger properties, barns, or multi-structure lots with recurring carpenter bee pressure.
Swap It Out When
You only have one low burrow to treat, since the Raid Wasp and Hornet Killer 17.5 OZ single can is the right size for that job.
What To Weigh Before Picking A Carpenter Bee Treatment
Spray Reach Versus Burrow Height. Most carpenter bee damage shows up under eaves, soffits, or deck rails. A 20 to 22-foot jet throw lets you treat second-story wood from the ground and cuts ladder time. Shorter nozzles still work on ground-level beams and low porch ceilings.
Residual Action Versus Repeat Visits. A spray that keeps killing for several weeks after the first pass means fewer trips up the ladder. Lighter formulas may need a second coat within a few days, which adds up across a busy spring.
Can Count Versus Property Size. A single can handles one or two burrows. Properties with three or more active sites benefit from twin packs or bulk packs that leave reserve cans ready. Shelf space matters, since aerosol cans store best in a cool, dry spot away from heat sources.
Spray Around Wiring. Carpenter bees love fascia boards near outdoor light fixtures. A dielectric breakdown voltage rating, the voltage threshold where the spray stops conducting electricity, tells you how safe the spray is to use near live wiring. Higher ratings give you more flexibility on soffits and porch lights.
Key Considerations Across These Picks
Pitfalls Shoppers Hit
Treating on the wrong day is the most common miss. Carpenter bees are most active in late morning, and spraying mid-day risks agitating returning males. Treating at sunrise or sunset, when the bees are slower and most are inside the burrow, gives the spray a better chance to reach the whole gallery.
A second slip is skipping the sealing step. Sprays kill the active adults, but open burrows invite new bees the following spring. Plugging treated holes with wood dowels or exterior caulk after the spray window closes keeps the same tunnel from becoming next year’s nest.
Where The Extra Money Goes
Higher-tier cans in this category buy two things: jet reach and residual window. The SpectracidePRO and the bulk Raid both publish longer spray distances than the basic single can. They also tend to carry stronger residual claims, which means fewer repeat passes across the same wood over a single season.
Frequently Asked Questions
When is the best time to spray carpenter bees? Treat burrows at sunrise or sunset when the bees are least active and most are tucked inside the tunnels. Mid-day spraying risks stirring up returning bees and reduces how much spray reaches the back of the gallery.
Do I need to seal the holes after spraying? Yes. Once the recommended wait window has passed, plug treated burrows with wood dowels and exterior caulk or wood filler. Sealing stops a new pair from reclaiming the same tunnel next spring.
How far can a jet spray reach? The cans in this lineup publish jet throws between 20 and 22 feet. Real-world reach depends on wind, angle, and how full the can is, so expect a few feet less on a breezy afternoon.
Are these sprays safe near outdoor light fixtures? Some cans publish a dielectric breakdown voltage rating, which describes how well the spray resists electrical current. Higher numbers mean safer application near soffit wiring and porch lights, but you should still shut off nearby fixtures when you can.
How many cans do I need for a typical yard? One can handles a handful of burrows on a single structure. Properties with damage across a deck, shed, and garage usually need two or more cans, which is where twin packs and five-packs earn their place.
Bottom Line
Pick the single Raid can for a one-burrow problem, the SpectracidePRO for high eaves, the Spectracide twin pack for multi-nest yards, and the Raid five-pack for property-wide pressure. Match the can to the height of your damage, and your spring should stay a lot quieter around the deck.