How does ant killer gel work?

Workers eat the sugar-based gel and carry the delayed-action dose back into the nest, where it is shared with the brood and the queen. Because the active ingredient is slow, the bait is distributed before it takes effect, so the whole colony is dosed.

Will I see more ants after applying it?

Usually yes, for a few hours. Heavy recruitment to the bait is the sign it is working. Leave the dots alone and do not spray over them.

Is it safe to use indoors with pets and children?

Yes, when applied as directed — small dots inside cupboard voids, behind kickboards, along hidden skirting edges and in cracks, out of reach of pets and children.

Does it work on garden ants coming indoors?

Yes. Black garden ants are the most common UK indoor invader. Bait the indoor trail at the entry point and the outdoor nest is dosed through the returning workers.

Ant killer that destroys the nest, not just the trail

Most ant killer products kill the workers you can see. That clears the trail for a day or two, then a fresh column appears from the same nest. Pest Tech Gel works the other way round: foragers feed on the bait, carry it back underground and share it with the brood and the queen, so the colony collapses instead of relocating.

4.3/5514 verified Amazon reviews

Shop kits & prices Free UK delivery

Nest transfer — workers feed the queen for you
Trails usually thin out within 24 to 36 hours
Odour-free, no fumes, no spraying near food surfaces
Free UK delivery, rated 4.3/5 from 514 Amazon reviews

Choose your kit

Want the full range in one place? See all ant killer gel kits.

Ant killer types compared

How gel bait compares with the ant killer formats sold in UK supermarkets and hardware shops.

Option	Kills the nest?	Indoor use	Timescale	Verdict
Pest Tech Gel ant bait	Yes — carried to the queen	Yes, applied out of reach	24 to 36 hours	Best choice for an indoor trail from an unseen nest
Aerosol / contact spray	No	Fumes near food surfaces	Instant on contact only	Trail returns once the spray dries
Insecticidal powder	Partly	Messy on worktops and floors	Days	Better outdoors, along walls and paving
Liquid bait stations	Yes, if fed	Yes	Days to weeks	Slower, and easy for ants to bypass

Why sprays and powders keep failing

Contact killers and repellent barriers destroy the foraging workers but never reach the brood. A mature garden or wall-void colony simply sends more workers, and heavy spraying can split the nest into satellite colonies that are harder to clear.

Where to put ant killer gel

Pea-sized dots directly beside the trail: along skirting edges, at the entry point where the column comes indoors, under the sink where pipework passes through, and beside door thresholds. Never wipe the trail away first — the pheromone path is what leads workers to the bait.

What happens after you apply

Expect more visible ants for the first few hours as workers recruit to the bait. That is the transfer working. Numbers drop sharply over the next 24 to 36 hours, and the nest is usually silent within a few days.