
JS8625-B 15-inch pneumatic silicone gun
The 15 inch pneumatic gun at 600 g, with a 350 KG frame tolerance and the same adjustable regulating valve as the rest of the pneumatic range.

Product Overview
The 15 inch pneumatic gun at 600 g, with a 350 KG frame tolerance and the same adjustable regulating valve as the rest of the pneumatic range. The extra barrel length takes larger packs while keeping the frame rating and the valve behaviour of the 9 inch model.
Why Buyers Choose This Model
15 Inch Barrel
Takes packs the 9 inch model cannot, while staying shorter and more manoeuvrable than the 18 inch version in a confined assembly area.
Adjustable Valve
Dispensing ratio and speed are set precisely at the valve, giving control over output during application rather than at purchase.
600 g With 350 KG Tolerance
The same frame rating as the 9 inch model in a longer body, so nothing is given up mechanically for the extra length.
Consistent Results In Demanding Conditions
Tailored for professional construction work and built to withstand demanding environments while delivering consistent results.
Where It Is Used
- Assembly work with larger sealant packs
- Production areas too tight for an 18 inch gun
- Professional construction with a portable compressor
- Repeat dosing where output must not vary
The Buyers This Model Suits
Assembly Shops
Uses larger packs than 300 ml but works in spaces where an 18 inch barrel is awkward.
Professional Construction Crews
Has a portable compressor on site and wants pneumatic output away from a factory.
Distributors Covering The Middle
Needs the middle length so the pneumatic range has three real steps rather than two.
What It Fixes
Barrel Length Versus Access
15 inch is the compromise that fits most work without limiting pack size to 300 ml.
Output Drifting Between Operators
A valve setting is a number that can be written down, unlike trigger feel.
Frames Rated Below The Air Supply
350 KG tolerance means the gun is not the weak link in a compressed-air setup.
How It Is Built
Pneumatic Operation
This silicone gun operates pneumatically, requiring connection to an air hose to dispense silicone smoothly and effortlessly.
Adjustable Valve
Equipped with an adjustable valve, you can precisely control the dispensing ratio and speed, ensuring optimal control during construction.
Efficiency
The pneumatic mechanism ensures high efficiency, making it an ideal choice for professional construction projects where speed and accuracy are crucial.
Uniform and Aesthetic Dispensing
The JS8625-B silicone gun ensures uniform and aesthetically pleasing silicone dispensing, adding a more professional look to your construction projects.
Professional Construction
Tailored for professional construction tasks, the JS8625-B can withstand demanding work environments and deliver consistent results.
User-Friendly
The ergonomic design and pneumatic operation make the silicone gun easy to use, reducing operator fatigue during prolonged use.
Published Figures For This Model
Every value below comes from our own product specification. Where a figure is not published we leave it out rather than estimating it.
| Net Weight | 600g |
|---|---|
| Packing | 1PCS/inner box, 12pcs/ CTN |
| Color | Frosted Purple, or customized |
| Carton Size | 52*55*45 |
| Push Force | According to the regulating valve change |
| Maximum Tolerance | 350KG |
| Drive Ratio | According to the regulating valve change |
| Colour options | Frosted Purple, or customized |
| Packing | 1PCS/inner box, 12pcs/ CTN |
| Minimum order | 1000pcs for a customised version |
| Customisation | Colour, packing method, carton appearance and logo |
How This Model Is Made
Parts for the JS8625-B are produced in our own workshops in Jinli Town, Zhaoqing. This model uses both routes: its moulded components come off our five horizontal and three vertical injection moulding machines, and its metal parts come off our fifteen automatic punching machines, nine automatic lathes and three welding machines. Tooling is designed and cut in our own mould room, which is why a change to this model does not queue behind another factory's schedule.
Quality Control
- Every model is weighed against its declared net weight during production, so the carton weight on your packing list matches what arrives.
- Stamped parts are produced in house on 15 automatic punching machines and 9 automatic lathes, so dimensional consistency is controlled at source rather than inspected on arrival.
- Moulded parts come off 5 horizontal and 3 vertical injection moulding machines running up to 10,000 mould open-and-close cycles per day, with tooling maintained in our own mould room.
- The quality management system was certified to ISO 9001:2015 in August 2023, with a certificate valid to 31 July 2026.
- Cartons are counted against the packing list as they are loaded into the container at our own factory door.
Certifications
The quality management system was certified to ISO 9001:2015 in August 2023, under standard GB/T19001-2016, for the manufacture and sale of glass caulking guns and sealant guns. The certificate on file runs to 31 July 2026; ask us for the current renewal status before relying on it. A TUV Rheinland assessment was obtained in 2016.
Customisation Options
- Aluminium Tube Anodizing And Colouring: More than 10 colours available; the surface can be given a frosted texture.
- Aluminium Tube Painting: Up to 10 colours with customisable patterns.
- Aluminium Tube Laser Engraving: Engraved logos, text and patterns on stamped fittings and aluminium tubes.
- Self-Adhesive Logo Labels: Applied to the product in the position the buyer specifies.
- Multi-Colour Logo Printing: Paint screen printing in any colour, with several colours printed at once.
- Tag And Product Screen Printing: Screen printed tags and product markings, multi-colour capable.
Getting The Best Out Of It
Step 1
Connect to the air hose with the regulating valve at its lowest setting.
Step 2
Raise the valve gradually while testing on scrap until the bead matches the joint.
Step 3
Record the valve setting against the product for repeatability between shifts.
Step 4
Disconnect air before loading, and keep the air line drained of moisture.
How It Compares In Our Range
Pick by barrel length first, since the valve behaviour is identical across the three.
| JS8625-A | 9 inch at 500 g for 300 ml bottles, same 350 KG tolerance. |
|---|---|
| JS8625-C | 18 inch at 750 g with a 400 KG tolerance, packed 12 per carton. |
| JS8622-B | A manual three-bearing gun at 180 KG, if no air supply exists. |
JS8625-B Questions
What are the force figures?
Push force and drive ratio change with the regulating valve setting, so no fixed value is published. The frame tolerance is 350 KG, the same as the 9 inch model.
Why choose 15 inch over 18 inch?
Access. The 15 inch is 600 g against 750 g and shorter, which matters in a tight assembly area. The 18 inch has a higher 400 KG tolerance if you need it.
Does it need a dedicated compressor?
It connects to a standard shop air hose. Our published materials do not state a required supply pressure, so confirm with us before sizing a compressor.
What colour is stock?
Frosted purple, with custom colours available. Minimum order 1,000 pieces.
How is it packed?
One piece per inner box, 12 pieces per master carton at 52 x 55 x 45 cm.
Trades That Use This Model
Tile And Stone Installation
Epoxy grout guns, pointing guns and slab lifters for tiling and stonework
Window And Door Manufacturing
Glazing, perimeter foaming and gap filling for window and door plants and installers
Construction Sealing And Waterproofing
Cartridge, sausage and powered guns for joint sealing and waterproofing trades
Guides That Cover This Model
Choosing A Two-Component Gun By Mix Ratio
The ratio is built into the gun's linkage, so a 1:1 gun cannot dispense a 1:4 product. Match the gun to the cartridge, every time.
Planning MOQ Packing And Container Loading
How to build a mixed order from published carton dimensions, and what the minimum order quantity actually applies to.
Quote The JS8625-B
Send the quantity and your colour and packing requirements, and we will confirm the minimum and a production date.


