Continuous spray that works at any angle

Continuous spray is only as good as the line that fills it — and few US manufacturers run commercial bag-on-valve. InSpec Solutions fills BOV and aerosol start to finish in-house: your formula stays air-free, sprays at any angle, and never gets handed to a third-party filler.

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What bag-on-valve actually is

A sealed bag inside the can keeps product and propellant apart

The mechanism

Product never touches propellant

In a traditional aerosol, the product and the propellant mix in the same chamber. In a BOV, the product fills an inner bag and the propellant surrounds it. They never touch. The result: no propellant in the formula, cleaner chemistry, and a spray that works upside-down, sideways, or any angle.

That air-free seal also means longer shelf life, better preservation of active ingredients, and no oxygen degradation, which is why BOV dominates in pharmaceutical topicals and premium sunscreen.

Close view of the rotary bag-on-valve and aerosol filling machine

Why brands switch

A format consumers prefer — and pay more for

Continuous spray is simply a better experience: even, full coverage at any angle, no rubbing it in, and the bag empties almost completely so nothing is left stranded in the package. That experience is why the format carries a $1–4 retail premium over equivalent pumps, and why shoppers who switch tend to stay with it.

The hard part is finding a manufacturer who can run the format. Most can't, and the ones who can are usually at capacity with their existing clients.

Gold aerosol cans staged on the bag-on-valve and aerosol filling line

How it's made

How a bag-on-valve unit gets filled

Can filling

Product is filled into an inner bag inside the can, completely sealed from the propellant from the start.

Valve crimping

The valve is crimped to the can under controlled pressure, creating the hermetic seal that makes air-free dispensing possible.

Gas injection

Compressed gas (nitrogen or compressed air) is injected between the can wall and the bag, creating the pressure that drives consistent spray.

QC & fill-weight check

Every unit is weighed and checked for spray consistency. Out-of-spec units are pulled before they leave the line.

Categories we run on the BOV line

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Continuous-spray SPF

Even, propellant-driven application with no white cast, the premium sunscreen format.

Setting & facial mists

Fine-mist delivery at any angle, including inverted. Ideal for finishing sprays and hydrating mists.

Wound wash & first aid

Sterile delivery, no contamination risk. Sprays upside-down for hard-to-reach wounds.

Pain relief spray

Lidocaine, menthol, and methyl salicylate formats in a hands-free topical delivery system.

Body spray & deodorant

360° application, alcohol and non-alcohol bases, long spray duration.

Baby & sensitive skin

Mineral SPF and fragrance-free mist formulas for gentle, even application.

The manufacturing reality

One of the few US manufacturers running bag-on-valve commercially

There are thousands of contract manufacturers in the US. Only a small number run commercial BOV lines, and most of that capacity is already committed. A brand trying to enter continuous spray often has nowhere to run it.

InSpec has run BOV alongside everyday formats since before spray SPF became a category. If you're ready to move, we can talk timelines and minimums.

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