Thin-to-thick transition
Lotions, shampoos and gels may be too thick for simple gravity filling but not as heavy as industrial pastes.
Viscous liquid filling
Viscous liquid filling machines for thick, sticky and slow-flowing products.
A practical route for products that sit between standard liquid filling and full paste filling, including gels, lotions, shampoos and semi-viscous products.
Piston and volumetric fillingSemi-auto to automatic linesUK advice and support
10–5000mlcommon dosing ranges
Pistoncontrolled viscous fills
Line-readyfill, cap and label
Viscous liquid filling
Not sure whether you need a liquid filler or a paste filler?
Use this route when your product is thicker than a free-flowing liquid but may not need a heavy paste filler. Terms such as viscous liquid filling machine, thick liquid filler, gel filling machine and high-viscosity liquid filler all need the same practical specification check.
Viscosity alone is not enough. Foaming, tailing, solids, temperature, fill size and container opening all influence the equipment route.
Product behaviourViscosity, temperature, particulates, aeration, stringing, settling and whether the product changes during the day.
Fill requirementTarget fill volume, tolerance, dose range, container neck opening, headspace and whether the fill is by volume, level or weight.
Container and closureJar, bottle, tub, cartridge, pail or jerrycan dimensions, cap style, labelling area and pack stability on conveyors.
Production targetRequired bottles per minute or per hour, number of SKUs, changeover frequency, cleaning process and operator involvement.
Foamy products
Detergents and shampoos can need slower filling, diving nozzles or product handling adjustments to avoid foam and trapped air.
Sticky products
Honey, syrup and gels need clean cut-off and may need heating or a different feed arrangement.
Not sure whether it is liquid or paste?
Send the product, viscosity notes and container details. The specification can be narrowed before you commit to one machine family.
What counts as a viscous liquid?
A viscous liquid is thicker than a free-flowing liquid and may need slower filling, different pumps, larger nozzles or positive-displacement dosing.
Is a viscous liquid filler the same as a paste filler?
There is overlap. Some products sit between liquid and paste, so the machine route should be selected after reviewing viscosity, foaming, stringing and container type.
Can viscous liquid fillers handle shampoo and gels?
Yes, many viscous liquid applications include shampoos, gels, lotions and detergents, but foaming and product compatibility need checking.