ARBO Professional Skeleton Sealant Gun 400ml – Yellow

The ARBO Professional Skeleton Sealant Gun is a robust, high-thrust manual applicator designed for professional mastic, glazing, construction and joint-sealing work.

Recognised by its durable yellow cartridge frame and black professional handle, this heavy-duty applicator provides a powerful 12:1 mechanical advantage. The increased thrust helps dispense medium and high-viscosity sealants, hybrid polymers, mastics and cartridge-applied adhesives with less trigger effort.

The open skeleton frame accepts standard 310ml, 380ml and 400ml cartridges, together with selected 150ml coaxial cartridges. A smooth trigger mechanism and pressure-release control help produce an even bead while reducing product run-on.

Key Features

• Professional skeleton frame construction for daily trade use
• Powerful 12:1 mechanical advantage ratio
• Suitable for low to high viscosity sealants and adhesives
• Accepts 310ml, 380ml and 400ml standard cartridges
• Also compatible with selected 150ml coaxial cartridges
• Pressure-release control to reduce product run-on
• Smooth trigger action for controlled bead application
• Painted steel frame — durable yellow and black finish
• Open skeleton frame for quick cartridge loading and monitoring
• Curved plunger-rod hook for convenient storage

Suitable Applications

• Applying silicone and construction sealants
• Applying hybrid polymer and MS polymer sealants
• Dispensing mastics and cartridge-applied adhesives
• Glazing and frame sealing
• Window and door installation
• Kitchen and bathroom fitting
• Interior and exterior joint sealing
• General building, joinery and maintenance work

Technical Specification

High-Thrust Performance

The 12:1 mechanical advantage delivers substantially more thrust than a standard 7:1 skeleton gun, making the ARBO Professional particularly well suited to medium and high-viscosity products such as hybrid polymer sealants, grab adhesives and construction mastics.

Cartridge Compatibility

This gun is designed for standard rigid cartridges in 310ml, 380ml and 400ml sizes, plus selected 150ml coaxial cartridges. It is not suitable for unsupported foil or sausage packs. Select a combination or sausage gun for foil-packed products.

Frequently asked questions

What cartridge sizes does the ARBO Professional gun accept?

It accepts standard 310ml, 380ml and 400ml rigid cartridges, plus selected 150ml coaxial cartridges.

What does 12:1 mechanical advantage mean?

The mechanism multiplies the force applied to the trigger by a factor of 12, delivering significantly more thrust than a standard 7:1 gun and making it easier to dispense thicker, more viscous products.

Can it be used with Arbosil and Arbomeric sealants?

Yes. It is compatible with the full range of ARBO cartridge sealants and adhesives in 310ml and 380ml sizes.

Can it dispense foil sausage packs?

No. This model is designed for rigid cartridges only. An enclosed combination or sausage gun should be used for foil-packed products.

Is a cartridge included?

No. The product consists of the applicator gun only.

Browse our complete selection of fillers, caulks and sealant accessories. Compatible ARBO sealants and adhesives are also available at Hart Wholesale.