HP-9900Neutral structural silicone sealant
The highest-strength grade in the neutral range — ≥1.8 MPa tensile, service from −50°C to +150°C — for structural bonding and sealing on curtain walls.

At a glance
Key figures
590 ml, 20 pcs/ctnNet weight
15–30 minutes (at 25°C)Skinning time
−50°C to +150°CService temperature
+5°C to +40°CApplication temperature
Technical data sheet
HP-9900 specifications
| Property | Value |
|---|---|
| Appearance | Smooth paste, available in various colors |
| Density (20°C) | 1.55 ± 0.05 g/cm³ |
| Curing method | Neutral cure, room temperature |
| Skinning time | 15–30 minutes (at 25°C) |
| Curing time | 48–72 hours (depending on thickness) |
| Application temperature | +5°C to +40°C |
| Service temperature | −50°C to +150°C |
| Tensile strength | ≥1.8 MPa |
| Elastic modulus | 0.6–1.0 MPa |
| Elongation at break | ≥200% |
| Shore A hardness | 30–40 |
| Water / UV / ozone resistance | Excellent |
| Color | White, black, customizable |
| Net weight | 590 ml, 20 pcs/ctn |
Values as published in the product datasheet and on the packaging. Typical values, not a specification. Always run a compatibility and adhesion test on the actual substrate before full application.
Features
What it does
Single componentReady to use, no mixing required.
Neutral cureNo acidic components, so no corrosion on building materials.
High strength and adhesionSuperior bond strength for demanding structural work.
Medium to high modulusBalances elasticity against structural stiffness.
Excellent flexibilityRetains elongation and water-tightness after cure.
Outstanding weather resistanceResists aging, UV, ozone and temperature extremes.
Applications
Where it goes
- Structural bonding of glass, stone, aluminium panel curtain walls and insulation panels
- Offset or butt joint sealing of glass in curtain walls and skylights
- High-rise and industrial structural bonding
- Semi-hidden and fully hidden frame curtain wall designs
Not sure this is the right grade?
Send us the substrate and joint width — we will name one.
Same range
Other grades in this range
Compare the figures before you decide.

HP-8800
Neutral curtain-wall silicone sealant
Curing method · Neutral cure, room temperature
Skinning time · 15–25 minutes (at 25°C)
Skinning time · 15–25 minutes (at 25°C)

HP-7000
Neutral silicone sealant for glass and stone
Curing method · Neutral cure, room temperature
Skinning time · 15–30 minutes (at 25°C)
Skinning time · 15–30 minutes (at 25°C)

HP-2000
Neutral weatherproofing silicone sealant
Curing method · Neutral cure, room temperature
Extrudability · Good extrudability within 4°C to 40°C
Extrudability · Good extrudability within 4°C to 40°C

BY-6000
Neutral silicone sealant
Curing method · Natural drying and curing
Net weight · 300 ml, 24 pcs/ctn
Net weight · 300 ml, 24 pcs/ctn
Enquiries
Order HP-9900
Tell us the volume and destination port. You get a datasheet and a price, usually within 24 hours.

