
JS8621-H Foam Gun with ON/OFF valve (Yellow and black plastic handle)
A black metal-bodied foam gun with a yellow plastic handle and an ON/OFF valve, at 340 g.

Product Overview
A black metal-bodied foam gun with a yellow plastic handle and an ON/OFF valve, at 340 g. The two-colour treatment is the point: a yellow handle on a black body is visible in a van and on a site, and it makes a distributor's range recognisable at a glance.
Why Buyers Choose This Model
Two-Colour Treatment
A black metal body with a yellow plastic handle, which is a finishing specification rather than a tooling change. Visible on a site and distinctive in a branded range.
Metal Body With A Plastic Handle
Metal where the foam and pressure are, plastic where neither is. That is the cost split that puts this in the mid tier.
ON/OFF Valve
Shut off flow at the gun between beads, rather than breaking the canister seal each time.
340 g, 40 Per Carton
Packed two per inner box and 40 per master carton at 38 x 34 x 52 cm, the standard foam gun carton.
Where It Is Used
- Trade insulation and gap filling
- Sites where tools get mislaid
- Distributor ranges needing a visually distinct model
- Own-brand foam ranges using colour as the identifier
The Buyers This Model Suits
Own-Brand Programmes
Uses handle colour as the brand cue across a foam range, which is cheap to change and immediately recognisable.
Site Crews
Loses black tools on black surfaces, and a yellow handle solves it.
Trade Distributors
Wants a metal-bodied gun at mid price with an ON/OFF valve.
What It Fixes
Tools Lost On Site
A yellow handle is the cheapest possible answer to that, and it costs nothing in tooling.
A Range That All Looks The Same
Handle colour differentiates models on a shelf where the bodies are identical.
Breaking The Canister Seal To Stop Flow
The ON/OFF valve handles it at the gun.
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 | 340 /g |
|---|---|
| Packing | 2PC/ inner box, 40pcs/ CTN |
| Color | black metal body with yellow plastic handle, or customized |
| Carton Size | 38*34*52 |
| Colour options | black metal body with yellow plastic handle, or customized |
| Packing | 2PC/ inner box, 40pcs/ CTN |
| Minimum order | 2000pcs for a customised version |
| Customisation | Colour, packing method, carton appearance and logo |
How This Model Is Made
Parts for the JS8621-H are produced in our own workshops in Jinli Town, Zhaoqing. This model is predominantly a moulded product, made on our five horizontal and three vertical injection moulding machines, which run up to 10,000 mould open-and-close cycles per day. 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
Shake the canister and thread it home fully before opening the valve.
Step 2
Close the ON/OFF valve between beads instead of removing the canister.
Step 3
Fill to roughly half depth and let the foam expand into the remainder.
Step 4
Flush with cleaner before the canister comes off, since the barrel is uncoated.
How It Compares In Our Range
The ON/OFF valve group, differentiated by handle treatment.
| JS8621-G | All-black metal with a plastic-dipped trigger at 290 g. |
|---|---|
| JS8621-I | All-black metal at 350 g, the heaviest in the group. |
| JS8621-F | Red plastic handle, with a silver or Teflon coated tube option, 290 g. |
JS8621-H Questions
What are the specifications?
340 g net weight, black metal body with a yellow plastic handle, ON/OFF valve. Packed two per inner box and 40 per carton at 38 x 34 x 52 cm.
Can the handle be a different colour?
Yes. The two-colour treatment is a paint-line and moulded-part choice rather than a tooling change, so other combinations are available at the 2,000 piece minimum.
Is the barrel coated?
No. The coated options are JS8621-D and the Teflon coated tube version of JS8621-F.
How does it compare with the all-black models?
Mechanically it is the same class. JS8621-G is 290 g with a plastic-dipped trigger and JS8621-I is 350 g all black. This model's difference is the yellow handle.
What is the minimum order quantity?
2,000 pieces for a customised version, per colour combination.
Trades That Use This Model
Insulation And PU Foam Application
Canister foam guns built around the one thing that kills them, cured foam in the barrel
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
Why PU Foam Guns Fail And What To Specify Instead
Foam guns are almost never worn out. They are written off because foam cured inside the barrel. Two specification choices change that.
Quote The JS8621-H
Send the quantity and your colour and packing requirements, and we will confirm the minimum and a production date.



