Introduction
Pakistan’s skyline is transforming. From Karachi’s ocean-front towers to Islamabad’s glass-clad government buildings, modern architecture demands materials that are as intelligent as they are beautiful. Glass facades, curtain walls, and structural glazing systems create stunning visuals — but they also create engineering challenges.
The gaps between glass panels, the joints between aluminum frames, and the interfaces between different materials all need to be sealed. Not just filled — but sealed in a way that accommodates movement, resists weather, and lasts for decades.
This is where Silirub WS+ enters the picture.
What is Silirub WS+?
Silirub WS+ is a high-performance, one-component neutral silicone sealant developed specifically for weather sealing applications in the facade industry. Manufactured by Soudal — a global leader in sealants and adhesives — this product represents the pinnacle of silicone technology.
The “WS” stands for Weather Seal, and the “+” indicates its enhanced formulation for demanding applications. It’s the sealant of choice for:
· Glass curtain wall installers
· Facade contractors
· Window and door fabricators
· Double glazing manufacturers
· Architectural metal workers
Available across Pakistan through Soudal Pakistan, Silirub WS+ brings world-class facade sealing technology to local projects.
Neutral Cure Technology
Unlike acidic (acetic acid-curing) silicones that release vinegar-like odors and can corrode metals, Silirub WS+ uses neutral cure technology. This means:
· No corrosion of aluminum, steel, or coated metals
· Low odor during application — better for occupied buildings
· Compatibility with sensitive materials
· MEKO-free formulation — safer for applicators
Exceptional Movement Capability
With >800% elongation and 50% movement accommodation, Silirub WS+ handles:
· Thermal expansion of glass and metal frames
· Building settlement and wind sway
· Seismic movement in high-risk zones
· Daily temperature cycling
Temperature Resilience
From -60°C to +180°C, this sealant performs in every Pakistani condition:
· Northern areas winter: Well below freezing
· Summer roof surfaces: Well above 60°C
· Industrial heat: Near machinery and ducts
Primary Applications in Pakistan
High-Rise Facades (Karachi, Lahore, Islamabad)
Modern towers with glass curtain walls demand precision sealing. Silirub WS+ is used for:
· Vertical and horizontal joint sealing
· Interface between glass and aluminum
· Perimeter seals around vision panels
· Expansion joint weather seals
Commercial Storefronts
From banks to shopping malls, storefront glazing needs reliable seals:
· Entrance door perimeter sealing
· Display window installation
· Aluminum frame glazing beads
Residential Window Installation
Quality window installers across Pakistan trust Silirub WS+:
· Frame-to-wall connection seals
· Glass-to-frame bedding
· Weather seals for sliding windows
Industrial Glazing
Factories and warehouses with glazed areas benefit from:
· Roof light sealing
· Saw-tooth roof glazing
· Clerestory window installation
Compatibility Guidelines
DO Use With:
· Float glass, tempered glass, laminated glass
· Anodized and coated aluminum (with activator)
· Galvanized and stainless steel
· Concrete, masonry, stone (with primer)
· Double glazing units (polysulphide/silicone sealed)
· Powder-coated surfaces (with activator)
DON’T Use With:
· Natural stone (marble, granite, travertine) — may stain
· Polycarbonate — use Silirub PC instead
· Polyethylene (PE), Polypropylene (PP), PTFE
· Bituminous substrates
· Continuous water immersion applications
· Structural glazing adhesive applications
Frequently Asked Questions (FAQs)
Q1: Why can’t I use it on natural stone?
Some sealants contain plasticizers or by-products that can migrate into porous stone, causing staining (yellowing or darkening). For marble, granite, and other natural stones.
Q2: Is Silirub WS+ paintable?
No. Like most high-performance silicones, Silirub WS+ is not paintable. Paint will not adhere properly and may peel or crack. It’s available in black, which is the standard color for facade joints.
Q3: What primers and cleaners should I use?
Based on TDS recommendations:
· Porous surfaces (concrete, masonry): Primer 150
· Non-porous surfaces (glass, metal): Soudal Activator or Surface Cleaner
· Powder-coated aluminum: Soudal Surface Activator recommended
· General cleaning: Soudal Surface Cleaner or Swipex
Q4: Can it be applied in winter?
Yes, within +5°C to +35°C application temperature range. In northern Pakistan winters:
· Store product at room temperature before use
· Ensure surfaces are frost-free and dry
· Allow extra curing time
· Consider using Primer 150 for better adhesion
Q5: What safety precautions should I take?
Follow standard precautions:
· Use in well-ventilated areas
· Wear protective gloves
· Avoid eye and skin contact
· Consult MSDS for detailed information
· Keep out of children’s reach
Conclusion
Silirub WS+ isn’t just another silicone — it’s a precision-engineered solution for the unique challenges of facade and glazing weather sealing. From its neutral cure technology to its exceptional movement capability, every aspect is designed for one purpose: creating seals that last as long as the building itself.
For Pakistan’s growing skyline, for architects who demand the best, and for contractors who take pride in their work Silirub WS+ is the professional choice.
Call to Action
Ready to specify Silirub WS+ for your next facade project?
Contact PATSA Pakistan:
· Find your nearest dealer in Karachi, Lahore, Islamabad
· Request technical data and MSDS
· Get project-specific application advice
· Inquire about bulk pricing for large developments
PATSA Pakistan — Sealing Pakistan’s Finest Buildings.
