1 inch PU foam cleaner spray valve for HVAC ductwork sealing

1. What is it?

PU foam with a long stem is a specialized two-component polyurethane foam (1k pre-polymer and 2k systems also exist) dispensed from an aerosol can through an elongated, rigid plastic straw-like applicator. This stem allows for precise, deep, and targeted application into hard-to-reach cavities, gaps, and voids that are impossible to reach with a standard short nozzle.

2. What are the primary use cases?

Its primary use case is precision application in construction, manufacturing, and maintenance. Key applications include:

• Installing Doors & Windows: Snaking foam deep into the rough opening around a window or door frame to ensure complete insulation and sealing without overspray on visible surfaces.

• Deep Cavity Wall Insulation: Filling the deep voids in masonry, concrete blocks, or behind sheathing where a standard nozzle cannot reach, improving thermal and acoustic performance.

• Pipe & Conduit Sealing: Sealing around pipes, electrical conduits, and cables where they penetrate walls or floors, creating fire, smoke, and air seals deep within the penetration.

• HVAC & Ductwork Sealing: Applying foam into gaps around ducting in tight attic or crawl space areas.

• Automotive, Marine, and RV Manufacturing/Repair: Precise application for sound dampening, insulating irregular cavities in doors and body panels, and sealing compartments.

• Appliance Insulation: Filling specific cavities in refrigerators, freezers, or water heaters during manufacturing or repair.

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3. What problems does it solve?

• Incomplete Sealing: Standard nozzles can't reach deep enough, leaving gaps and cold bridges in the center of a wall cavity.

• Messy Overspray: The long stem delivers foam exactly where it's needed, minimizing waste and preventing unsightly foam on finished surfaces, bricks, or glass.

• Inefficient Use of Material: Allows users to fully empty the can by reaching into the deepest application points, ensuring no product is wasted.

• Difficulty Accessing Tight Spaces: Solves the problem of insulating and sealing cavities that are narrow, deep, or have complex geometries.

• Labor Inefficiency: Reduces the need for makeshift solutions like attaching tubes to short nozzles, which are often unstable and messy.

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JINCHENG aerosol valve manufacturers has been a seasoned valve product manufacturer and exporter for more than ten years. Our high quality products, such as aerosol valves, aerosol caps and aerosol cans are exported to more than 50 countries in Europe, America and Asia. Our main products are air freshener aerosol valve, insecticide spray aerosol valve, butane gas aerosol valve, carburetor cleaner aerosol valve, ribbon spray aerosol valve, snow spray aerosol valve,paint spray aerosol valve, fluid spray aerosol valve, portable stove gas aerosol valve, 360 degree aerosol valve, powder spray aerosol vave. Also we have expanded the export market of aerosol metering valves, aerosol caps and aerosol cans. All products have won high reputation from our clients all over the world.

At the same time, our products have received the international recognition and reached the standards of ISO9001. We welcome clients from all over the world to negotiate business with us. We sincerely hope that we can cooperate with you and develop together!.

With the business purpose of "quality first, integrity based", we always take meeting the needs of users as our only goal and provide users with quality products and excellent services. Technical expertise and excellent performance of our products are the directions of our efforts. Hope we can cooperate in the new year of 2012 to creat more achievements!

Our major exports include butane gas stove valve, butane gas tin cans, camping gas cartridge, folder sprayer(nozzle) with extention tube and insecticide aerosol plastic cap with extention tube.

Butane gas stove valve with red cover

Aersol sprayer / nozzle / trigger with extention tube and lock

Butane gas tin cans  / camping gas tin cans / cartridge gas tin cans

Aerosol plastic insecticide spray cap with extention tube 

Gas lighter refill valve with adaptor /  lighter gas refiller valve with adaptor