Weber Weberseal NS 135

Overview: Weberseal NS 135 is Weber's facade-grade neutral-cure silicone sealant (glass glue), a mid/high-modulus elastic formulation designed for weatherproofing building facades and glass curtain walls. Neutral cure means it does not corrode metals or coated glass; with excellent UV and weathering resistance it withstands long-term rain, sun and temperature swings while accommodating dynamic joint movement.

Key features

• Mid/high-modulus elastic silicone — designed for facade weatherproofing, balancing strength and elasticity
• Excellent weathering — resists UV, ozone and extreme temperature swings, suited to long-term exposed facades
• Neutral cure — releases no acidic gases; does not corrode metals, coated glass or alkaline substrates
• Good joint movement — stays elastic after curing, accommodating dynamic facade joint movement
• Strong adhesion — good adhesion to glass, aluminium, stone and other common facade materials

Applications

• Glass curtain-wall joints — weatherproof sealing between glass panels and aluminium frames
• Facade expansion joints — filling and sealing dynamic joints on building elevations
• External window/door perimeters — weatherproofing exposed window and door frames
• Facade panel joints — sealing between aluminium and stone curtain-wall panels

Why choose Weberseal NS 135

• Facade-grade — stronger weathering resistance than general-purpose sealants, accommodating larger joint movement
• Built for harsh exteriors — designed for Hong Kong facade conditions of strong wind, intense sun and temperature swings
• Neutral cure protects substrates — gentle on aluminium windows, coated glass and stone; will not corrode or stain

Usage notes

Ensure the substrate is clean, dry and free of oil and loose material before application. Wide, deep expansion joints can use a backer rod to control sealant depth and avoid three-sided adhesion. Neutral silicone cures on airborne moisture, so deep joints cure more slowly; "surface dry" and "fully cured" are two stages, and the joint should not be loaded or wetted before it fully cures. Refer to the product Technical Data Sheet (TDS) for joint design, coverage and curing times.

FAQ

What is the difference between NS 135 and NS 105?
NS 105 is a general-purpose sealant for interior and exterior use; NS 135 is facade-grade, with stronger UV and weathering resistance and greater joint-movement capacity, designed for harsh exterior conditions. NS 105 suits general interior and ordinary exterior use, while NS 135 is recommended for high-rise curtain walls and large facade expansion joints.

What is the difference between NS 135 and Dowsil 791?
Both are high-performance neutral-cure facade sealants with similar positioning, both suited to facade and curtain-wall weatherproofing; the choice usually comes down to the project's specified brand and supply.

Most products typically in stock; individual items welcome to enquire. For detailed technical data and application method, refer to the product Technical Data Sheet (TDS), or WhatsApp Wah Hing for a quote.