Packaging Size: 300 ml cartridge
Packaging Type: Tube
Colour: White
Brand: Dowsil
Product Type: High-Strength Construction Adhesive
Compatible Materials: Concrete, Brick, Wood, Metal, Glass, Tiles, uPVC
Country of Origin: Made in India
Availability: In Stock
When it comes to protecting a building’s exterior from the relentless forces of nature, engineers and architects worldwide turn to one name: Dowsil (formerly Dow Corning). Dowsil Nails 3450 Weatherproof Silicone Sealant is a premium, high-performance, neutral-curing silicone specifically designed to seal the building envelope against air and water infiltration.
In a city like Delhi, where buildings face extreme heat in summer and heavy rain during monsoons, a standard sealant simply won’t last. Dowsil Nails 3450 is engineered to withstand these specific challenges. At Poly Prime Industry, we are committed to supplying genuine Dowsil Nails 3450 to contractors and fabricators across the NCR, ensuring that every joint we seal contributes to the longevity and safety of the structure.
Dowsil 789 is a one-part, neutral-alkoxy curing silicone. This advanced chemistry makes it superior to traditional “acid-cure” silicones in several ways:
Unlike acetic sealants that release acidic vapors, Dowsil Nails 3450 is non-corrosive. It is 100% safe for use on sensitive architectural materials such as:
Coated Glass: It won’t damage the reflective or low-E coatings.
Metals: Safe for anodized aluminum, galvanized steel, and copper.
Stone & Masonry: It provides excellent adhesion to concrete and brick without the risk of chemical staining.
Time is a critical factor on construction sites. Dowsil Nails 3450 reacts quickly with atmospheric moisture to form a tack-free surface, allowing projects to move forward without long wait times. Its smooth, buttery consistency ensures that applicators can tool the joints easily for a professional finish.
Dowsil Nails 3450 is formulated with a high-purity silicone polymer that is virtually unaffected by sunlight (UV radiation), ozone, or extreme temperature variations. It does not become brittle in the winter or soft and sticky in the summer, maintaining a perfect seal from -50°C to +150°C.
Modern buildings are designed to move. Thermal expansion and wind loads cause joints to widen and narrow. Dowsil Nails 3450 is a medium-modulus sealant with exceptional elasticity. It can stretch and compress repeatedly without losing its bond or tearing, making it ideal for high-rise facades.
Architecture is about more than just strength—it’s about beauty. To match the diverse color palettes of modern building materials, Dowsil Nails 3450 is available in:
Black: For dark-framed curtain walls and ACP.
White: For clean UPVC window perimeters and sanitary finishes.
Grey: To blend seamlessly with concrete and stone cladding.
Clear: For transparent glass-to-glass joints where a hidden seal is required.
In most cases, Dowsil Nails 3450 forms a strong, durable bond with glass and aluminum without the need for a primer, saving both labor costs and material expenses on-site.
The versatility of Dowsil Nails 3450 Weatherproof Silicone Sealant makes it indispensable for:
Façade Glazing: Used as a secondary seal in curtain walls to ensure the system is completely watertight.
Window & Door Perimeters: Providing the final weather-seal between the outer frame (Aluminum/UPVC) and the building’s masonry or concrete.
Expansion Joints: Sealing joints in exterior elevations that are subject to high movement and environmental stress.
ACP Cladding: The preferred choice for sealing gaps between Aluminum Composite Panels (ACP) due to its UV stability and flexibility.
Roofing & Skylights: Sealing skylights and metal roofing components where water-tightness is non-negotiable.
| Feature | Technical Detail |
| Brand | Dowsil (Formerly Dow Corning) |
| Model | 3450 Weatherproof Silicone |
| Packaging | 500 ml Cartridge |
| Cure Type | Neutral Alkoxy |
| Application Temp | +5°C to +40°C |
| Service Temp | -50°C to +150°C |
| Movement Capability | ± 25% / 50% |
| Shelf Life | 12 Months from Date of Manufacture |
For a warrantable, long-lasting seal with Dowsil Nails 3450, follow these expert steps:
Clean: Ensure surfaces are clean, dry, and frost-free. Use a “Two-Wipe” cleaning method with a lint-free cloth and a solvent (like IPA) for non-porous surfaces.
Backing: Use a closed-cell PE Backing Rod to control the sealant depth. This ensures the sealant only bonds to the side walls, allowing for maximum flexibility.
Apply: Use a professional caulking gun to apply a continuous bead of Dowsil Nails 3450. Ensure the sealant fills the joint completely to avoid air pockets.
Tool: Tool the sealant within 10-15 minutes using a spatula. This presses the sealant against the joint surfaces for optimal adhesion and creates a smooth, professional aesthetic.
As a premium wholesale distributor in Delhi (Krishna Nagar), Poly Prime Industry provides the reliability that project managers and contractors need.
100% Genuine Dowsil Stock: The market is full of expired or counterfeit products. We guarantee that every cartridge of Dowsil Nails 3450 we sell is 100% original and direct from authorized channels.
Fresh Inventory: We monitor batch dates strictly. Our Dowsil Nails 3450 stock is always fresh, ensuring you get the maximum shelf life and peak performance on-site.
Ready Bulk Stock in Delhi: Whether you need 10 boxes or 100, we maintain a ready inventory of Black, White, Grey, and Clear colors for immediate pickup or delivery.
Competitive Wholesale Rates: We offer the best bulk pricing in the Delhi NCR region, helping you keep your project costs low without sacrificing quality.
Q1. Can Dowsil Nails 3450 be used for structural glazing?
Dowsil Nails 3450 is a Weatherproofing sealant. While it has great strength, it is designed for sealing gaps against weather. For Structural bonding (where the silicone holds the glass panel in place), we recommend Dowsil Nails 3450 or Wacker SG79.
Q2. Is Dowsil Nails 3450 safe for natural stone?
Dowsil Nails 3450 is a neutral-cure silicone and is generally safe. However, for highly porous stones like white marble, we always recommend a small patch test to ensure there is no “fluid migration” or staining.
Q3. How long does Dowsil Nails 3450 take to fully cure?
It skins over in about 15-20 minutes. A full deep-cure (through the entire bead) usually takes 7 to 14 days, depending on the humidity and joint thickness.
Q4. Where can I buy Dowsil Nails 3450 wholesale in Delhi?
Poly Prime Industry is your authorized wholesale source in Delhi. We offer competitive rates and fast dispatch across Delhi, Noida, and Gurgaon.
Don’t let your building’s exterior be compromised by low-quality sealants. Choose the global trust of Dowsil Nails 3450 Weatherproof Silicone Sealant. When you partner with Poly Prime Industry, you get the best products and the best service in the industry.
