Packaging Size: 750 ml can (as commonly supplied)
Packaging Type: Aerosol Can
Colour: Light Yellow / Off-White (after curing)
Brand: Dowsil
Product Type: Polyurethane Expanding Foam
Compatible Materials: Concrete, Brick, Wood, Aluminium, uPVC, Metal
Country of Origin: Made in India
Availability: In Stock
In today’s fast-paced construction and fabrication industry, achieving a perfect, airtight seal in gaps and cavities is a major challenge. Traditional mortars and fillers often crack or fail to provide thermal and sound insulation. Dowsil PU Foam (Polyurethane Foam) is a high-performance, one-component expanding foam designed to solve these problems permanently.
Whether you are installing premium uPVC windows, wooden door frames, or sealing complex architectural voids, Dowsil PU Foam provides a structural, insulating, and waterproof barrier that lasts for decades. At Poly Prime Industry, we specialize in providing genuine Dowsil PU Foam 750ml cans to contractors and installers in Delhi, ensuring that every project achieves the highest standards of energy efficiency and soundproofing.
Dowsil PU Foam is an aerosol-based product that reacts with atmospheric moisture to expand and cure. Once discharged, the foam undergoes a rapid expansion process, filling every nook and cranny of the cavity before hardening into a rigid, cellular structure.
High Expansion Ratio: A single 750ml can of Dowsil PU Foam can expand significantly, covering large volumes with minimal product usage. This makes it highly cost-effective for large-scale projects.
Controlled Expansion: While the foam expands powerfully, it is engineered for “controlled expansion,” meaning it won’t exert excessive pressure that could warp or bend sensitive window or door frames.
Airtight & Watertight: Once cured, the closed-cell structure of the foam prevents air leakage and water ingress, making the building’s envelope more secure.
One of the standout features of Dowsil PU Foam is its insulation capability. It effectively blocks the transfer of heat, helping to maintain indoor temperatures and reduce electricity bills (Air Conditioning/Heating costs). Additionally, its dense structure acts as a superior sound barrier, making it ideal for soundproofing rooms near busy Delhi roads.
Dowsil PU Foam is a versatile “grab-all” filler. It provides excellent primerless adhesion to:
Masonry: Concrete, bricks, and cement plaster.
Metals: Aluminum, galvanized steel, and iron.
Wood & Plastics: uPVC window profiles, wooden door frames, and PVC pipes.
Insulation Boards: Polystyrene and other synthetic materials.
Cheap PU foams often shrink or continue to expand long after application, leading to cracks or frame misalignment. Dowsil PU Foam is formulated for high dimensional stability. Once it has cured, it remains stable without shrinking, ensuring the seal stays tight for the life of the building.
After the foam has fully cured (usually within 1-2 hours), it becomes rigid yet easy to handle. You can easily:
Trim/Cut: Use a standard cutter to remove excess foam for a flush finish.
Sand: Smooth the surface for a clean look.
Paint/Plaster: The cured foam is compatible with most paints, plasters, and sealants.
The versatility of Dowsil PU Foam makes it a must-have for various construction and fabrication tasks:
This is the most common use. It fills the “perimeter gap” between the window/door frame and the wall. It provides structural support to the frame while ensuring the edges are completely insulated against dust, rain, and noise.
Ideal for filling large holes in walls where pipes or electrical conduits pass through. It prevents pests, insects, and air from traveling through these openings.
Used to seal gaps in roofing sheets, skylights, and attic insulation. It is also excellent for bonding insulation panels to walls or ceilings.
Used in the construction of recording studios, home theaters, and office partitions to eliminate “flanking noise” that travels through gaps in the structure.
Because of its high thermal resistance, it is widely used in sealing joints in cold storage units, refrigerated trucks, and around air conditioning ducts.
| Feature | Technical Detail |
| Product Name | Dowsil PU Foam |
| Packaging | 750 ml Aerosol Can |
| Base | One-Component Polyurethane |
| Tack-Free Time | 8-12 Minutes |
| Cutting Time | 45-60 Minutes |
| Full Cure Time | 24 Hours |
| Fire Class | B3 (Standard Construction Grade) |
| Temperature Resistance | -40°C to +90°C (Cured) |
To get the maximum yield and bond strength from your Dowsil PU Foam, follow these expert tips:
Preparation: Clean the gap of all dust and grease. Crucial Tip: Lightly spray the surface with water using a mist sprayer. Moisture helps the foam expand more evenly and cure faster.
Shake Well: Shake the can vigorously for at least 20-30 seconds to mix the internal components.
Application Position: Always hold the can upside down during application. This ensures the propellant pushes the foam out correctly.
Fill Partially: Only fill the cavity about 50-60% of the way. Remember, the foam will expand to fill the rest of the space.
Protection: PU foam is sensitive to UV light. If using it outdoors, always cover the cured foam with a layer of paint, plaster, or a UV-stable sealant like Dowsil 789.
When you are sealing critical gaps in a high-budget project, the quality of the foam matters. Poly Prime Industry is your trusted wholesale partner in Delhi for all Dowsil products.
100% Genuine Dowsil Stock: We guarantee original products with the correct pressure and chemical composition. No “half-filled” or counterfeit cans.
Fresh Inventory: PU foam has a specific shelf life. We maintain a fresh stock at our Krishna Nagar warehouse, ensuring the foam expands to its full potential.
Bulk Wholesale Pricing: We cater to large-scale contractors and window fabricators with the best bulk rates in the Delhi NCR region.
Ready for Immediate Dispatch: We understand that site work can’t stop. We keep ready stock for fast delivery to Delhi, Noida, Gurgaon, and beyond.
Q1. How much area does one 750ml can cover?
One 750ml can of Dowsil PU Foam can yield between 30 to 40 liters of expanded foam, depending on the temperature and humidity.
Q2. Is Dowsil PU Foam fireproof?
It is a standard B3 grade construction foam, which means it is combustible. For fire-rated applications, a specific “Fire-Rated PU Foam” should be used.
Q3. Can I reuse a can if I don’t finish it?
If you are using a “Gun Grade” can, you can leave it attached to the gun with the valve closed. For “Nozzle Grade” cans, you must clean the nozzle and valve with a PU foam cleaner immediately after use to prevent the foam from hardening inside.
Q4. Where can I buy Dowsil PU Foam in Delhi?
Poly Prime Industry is your authorized wholesale source. You can pick it up from our warehouse or have it delivered to your site.
For professional results in insulation and gap filling, there is no substitute for Dowsil PU Foam. It is the bridge between a “good” job and a “perfect” one.
