It is the cheapest tool in the van and the one that ruins a day fastest when it lets you down. A caulking gun that drips, that you have to pump twice to shift a bead, or that snaps its trigger halfway down a run of skirting will cost you far more in wasted sealant and rubbed-out beads than the gun ever cost to buy. Decorators, plasterers, kitchen fitters, glaziers and everyone doing a bit of everything reach for one of these several times a day, so it is worth getting the right one.
This is a straight, practical guide to the caulking guns worth buying in the UK right now. We cover cheap skeleton guns, proper manual guns like the Cox Powerflow, and the cordless options from DeWalt and Milwaukee that have crept onto sites over the last few years. No jargon, just what matters when you are cutting in mastic all day.
Our quick verdict
For most tradespeople, a Cox Powerflow manual gun is the sweet spot. At around £35 to £45 it costs several times what a builders’ merchant skeleton gun does, but the smooth thrust, proper drip control and the fact it lasts years rather than months make it the honest choice for anyone using sealant every day.
If you are on the tools occasionally or you keep losing guns off shared sites, do not overthink it — a decent own-brand or Everbuild skeleton gun at a fiver to fifteen quid will do the job, and you will not cry when it walks. Buy two.
If you already run a battery platform and you are laying a lot of grab adhesive or long runs of sealant on commercial jobs, a cordless gun earns its keep. The DeWalt DCE560 is the go-to for adhesives and foil packs; the Milwaukee M12 PCG is the smoother tool for pure sealant if you are on M12 already.
At a glance: the caulking guns compared
| Gun | Type | Cartridge | Approx price | Best for |
| Cox Powerflow | Manual | 400ml | £35–£45 | Daily wet-trade use |
| Fischer heavy-duty | Manual | 310–400ml | £20–£30 | Occasional heavy beads |
| Everbuild / own-brand skeleton | Manual | 310ml | £5–£15 | Second gun / apprentices |
| DeWalt DCE560 | Cordless 18V | 300ml + foil | £130–£150 body | Adhesives & grab bonds |
| Milwaukee M12 PCG310 | Cordless 12V | 310ml | £185–£200 body | High-volume sealant work |
Prices are inclusive of VAT and reflect typical UK retail at the time of writing from Screwfix, Toolstation and Amazon UK. Cordless prices are for the bare tool — add a battery and charger if you are not already on the platform.
The best caulking guns for UK trade in 2026
Cox Powerflow — best manual gun for daily use
The Powerflow is the gun most experienced decorators and wet-trade lads end up with. The thrust ratio is high enough to shift stiff, cold silicone without wrecking your hand, the trigger has a smooth pull rather than the sharp snap of a cheap skeleton gun, and the drip control actually works — release the trigger and the plunger backs off, so you are not chasing runs down the wall. Cartridge and foil-pack versions are available, and spares are easy to get. At £35 to £45 it is not cheap next to a skeleton gun, but spread over the years it lasts, it is the value pick.
Fischer and other heavy-duty manual guns — best for occasional heavy beads
If you only reach for a gun now and then but when you do it is heavy grab adhesive or intumescent mastic, a mid-range heavy-duty manual gun in the £20 to £30 bracket gives you most of the thrust of a Powerflow without the full price. They are less refined on drip control and the handles are not as comfortable over a long day, but for intermittent use they are plenty.
Everbuild and own-brand skeleton guns — best budget option
The classic open-frame skeleton gun costs between a fiver and fifteen quid and every merchant sells them. They flex under load, they drip unless you twist the rod back yourself, and the cheapest ones bend if you lean on them. But they work, they are everywhere, and they are cheap enough to keep spares in the van and hand to the apprentice. For light, occasional sealant jobs there is no shame in one.
DeWalt DCE560 — best cordless for adhesives
The DCE560 is an 18V XR cordless gun that takes both 300ml cartridges and foil sausage packs with the right carrier. Variable-speed trigger, adjustable flow dial and an anti-drip function mean consistent beads with none of the hand fatigue of manual pumping — which matters if you are laying grab adhesive on a full day of dry-lining or bonding. Around £130 to £150 body-only, so it is an investment, but if you are already on DeWalt 18V and doing volume it pays back fast in speed and wrists.
Milwaukee M12 PCG310 — best cordless for sealant work
Milwaukee’s M12 caulking guns are the smoother, lighter option for pure sealant. The 310ml cartridge version suits standard mastic tubes; there is also a 600ml sausage-pack model for high-volume commercial work. The M12 platform is compact and light in the hand, and the anti-drip and consistent flow give you tidy beads with far less effort. Around £185 to £200 body-only — steep, but on M12 already and cutting in mastic all day, it is a genuinely nice tool.
Manual or cordless — which do you actually need?
Be honest about your volume. If you use sealant a few times a week, a good manual gun is all you will ever need and a cordless is money you do not need to spend. The Cox Powerflow will out-live several cheap cordless batteries and never needs charging.
Cordless earns its place when you are laying long, continuous beads or stiff adhesives for hours — commercial mastic runs, dry-lining grab adhesive, kitchen and bathroom fit-outs day in day out. The consistent flow gives a tidier finish and your hands are not wrecked by four o’clock. If that is your work, the DeWalt or Milwaukee is worth it; if it is not, it is a luxury.
Buyer’s guide: what to look for
Thrust ratio
This is how hard the gun pushes for a given squeeze of the trigger. A higher ratio (12:1 or 18:1) shifts stiff, cold sealant and adhesive with less effort. Cheap skeleton guns are often around 7:1, which is fine for warm decorator’s caulk but a struggle with cold silicone in winter.
Cartridge, foil pack or sausage
Most guns take standard C1/C3 cartridges. If you buy sealant in foil sausage packs to cut waste and cost, make sure the gun takes them or has a sausage carrier available — Cox, DeWalt and Milwaukee all offer versions that do.
Drip and flow control
An anti-drip mechanism releases pressure the instant you let go of the trigger, so the sealant stops flowing instead of oozing out and running down your fresh bead. On manual guns this is a rod that disengages; on cordless it is electronic. It is the single feature that most separates a good gun from a frustrating one.
Build and comfort
If you are using it all day, a comfortable handle and a smooth trigger matter more than any spec. Pressed-steel skeleton frames flex and dig into your hand; the better manual guns have a proper moulded grip and a smoother action.
FAQs
What thrust ratio do I need for silicone?
For general decorator’s caulk, 7:1 is fine. For silicone and stiffer sealants, especially in cold weather, look for 12:1 or higher — it is the difference between an easy pull and a sore hand by lunchtime.
Are cordless caulking guns worth it?
Only if you use sealant or adhesive in volume every day. For occasional use they are expensive overkill and a good manual gun does the same job. For all-day mastic and grab-adhesive work they save your hands and give a tidier bead.
Why does my caulking gun keep dripping?
Usually because it has no anti-drip mechanism, so pressure stays on the cartridge after you release the trigger. On a basic skeleton gun, twist the push rod a quarter-turn to disengage it after each bead. A gun with proper drip control does this for you.
Can one gun handle both sealant and grab adhesive?
Yes, as long as the thrust ratio is high enough — grab adhesive is stiffer than most sealant. A Cox Powerflow or any of the cordless guns will handle both; a cheap 7:1 skeleton gun will struggle with adhesive in the cold.
The bottom line
Buy a Cox Powerflow and be done with it — it is the tool that suits the widest range of tradespeople and it will out-last a drawer full of cheap ones. Keep a couple of skeleton guns in the van as spares and site-loaners. And if you are cutting in mastic or grab adhesive all day, every day, put a DeWalt DCE560 or a Milwaukee M12 on the list — your wrists will thank you and your beads will look the part.
