Dowsil 995 Silicone Structural Sealant
Dowsil 995 Silicone Structural Sealant
📋 Product specifications are for reference only.
All product details should refer to the official manufacturer documents. For official product data sheets or technical enquiries, please contact us via WhatsApp.
Dowsil 995 is a globally recognised silicone structural sealant designed for structural glazing of curtain wall systems. Tested to hurricane and impact-resistance ratings, it delivers high joint movement capability with excellent adhesion to glass and aluminium without primer. Compliant with US, China, and European structural glazing standards. Supplied by Wahhing Construction Waterproofing Materials.
Dowsil 995 — High-Performance Silicone Structural Sealant
Dowsil 995 (formerly Dow Corning 995) is a one-component, neutral-cure silicone elastic adhesive formulated specifically for structural glazing of curtain walls. Once cured, it forms an exceptionally tough elastic rubber that delivers durable, flexible, and waterproof structural bonds. Dowsil 995 is one of the most widely specified structural sealants for curtain wall projects worldwide, with extensive use in Hong Kong high-rise construction.
Key Features
- Structural bonding — capable of withstanding wind loads to support glass and panels
- High joint movement capability
- Hurricane and impact-rated window/door certification
- Primer-free — excellent adhesion to coated glass, enamel glass, reflective glass, aluminium, and more
- Odourless, non-corrosive cure
- Outstanding weatherability — UV, ozone, and extreme temperature resistant
- Compliant with global structural glazing standards (US, China, Europe)
Applications
- Structural curtain walls — structural bonding of glass curtain wall assemblies
- Protective glazing — hurricane/impact-rated windows and doors
- Structural joints in small to mid-rise buildings
- Bonding of coated and reflective glass
- Exterior glass retention on high-rise facades
Why Hong Kong curtain wall projects choose Dowsil 995
Hong Kong's high-rise skyline and extreme typhoon-season winds demand the highest performance from structural sealants. Dowsil 995 offers:
- Hurricane-rated certification: tested to hurricane and impact standards, ensuring reliable bonds under extreme weather
- Primer-free adhesion: bonds directly to most glass and aluminium substrates, saving application steps
- Dow brand reliability: Dowsil (formerly Dow Corning) is the global leader in silicone sealant technology
- Long-term weatherability: resists UV, ozone, and extreme temperatures for lasting structural seal performance
Specifications
| Item | Specification |
|---|---|
| Type | One-component neutral-cure silicone structural sealant |
| Movement capability | High |
| Primer | Not required for most substrates |
| Certification | Hurricane/impact-rated; US/China/EU standards |
| Packaging | 300ml cartridge |
| Colour | Black |
Dowsil 995 vs 795 vs 791
| Model | Application | Structural | Features |
|---|---|---|---|
| Dowsil 995 | Structural curtain wall bonding | Structural | Hurricane-rated, highest mechanical strength |
| Dowsil 795 | Structural sealing | Structural | Medium modulus, versatile structural seal |
| Dowsil 791 | Weatherproofing | Non-structural | General weatherproofing, most widely used |
Dowsil 995 is the highest-grade structural sealant in the Dowsil range, used where glass must be bonded to withstand wind loads. 795 is also structural but with slightly lower mechanical strength. 791 is a weatherproofing sealant not intended for structural bonding.
FAQ
What is the difference between Dowsil 995 and 795?
Both are Dowsil structural silicone sealants. 995 has higher mechanical strength and is specifically designed for hurricane/impact-rated glazing. 795 suits general structural sealing with a broader application range. Use 995 for demanding curtain wall projects; 795 for general structural sealing.
Can Dowsil 995 be used for general weatherproofing?
Yes, but it is not cost-effective for that purpose. Dowsil 995 is a premium structural sealant. For general weatherproofing, Dowsil 791 provides adequate performance at a lower cost.
How does Dowsil 995 compare to other structural sealant brands?
Dowsil (formerly Dow Corning) is the global leader in silicone sealant technology, and the 995 series has decades of proven field performance. Its advantages include more stringent hurricane/impact test certifications, primer-free adhesion to a wide range of substrates, and specified use on major Hong Kong curtain wall projects.
Pricing
Contact us via WhatsApp for current Dowsil 995 pricing. We offer counter collection from our Mong Kok store and delivery throughout Hong Kong.
For detailed application methods, coverage rates, and technical parameters, please refer to the official product data sheet.
