11
Buy in Bulk and Save!
Price Per Unit: $7.71
Price Per Box: $6.94
Use Hypersil 911 for: General glazing, weatherproofing construction joints, sealing building cladding, perimeter sealing of windows & doors.
Pasco Hypersil 911 is a high-performance, 100% Neutral Cure Silicone Sealant designed to deliver durable, flexible, and waterproof seals for a wide array of applications in the Australian construction and glazing industries. Formulated for exceptional longevity, Hypersil 911 boasts excellent UV stability and weathering resistance, making it ideal for both internal and external use. Its neutral cure chemistry ensures it will not corrode metals like aluminium or steel and won't react with concrete or masonry substrates, offering superior adhesion across common building materials including glass, metals, concrete, ceramics, and painted surfaces. Offering ±25% joint movement capability and available in an extensive colour range, Hypersil 911 provides a reliable and aesthetic finish for general glazing, curtain walls, construction joints, building cladding, and perimeter sealing tasks.
Primer Information: Hypersil 911 typically exhibits excellent adhesion to clean, dry, sound surfaces without the need for a primer. For critical applications, unusual substrates (like some plastics or stone), or to ensure optimal long-term performance in demanding environments, adhesion testing is always recommended. Contact Adheseal or Pasco technical support if specific surface preparation advice is required.
Cure Time: This sealant forms a skin in approximately 8-10 minutes at 20°C and 50% relative humidity, allowing for tooling shortly after application. Full cure for a 10mm deep joint at 25°C typically takes 5-7 days. Curing relies on atmospheric moisture and will be slower in deeper joints or cooler/drier conditions.
Coverage Rate: Coverage depends on joint dimensions. As a guide, a 300ml cartridge will seal approximately 8.3 linear metres of a 6mm wide x 6mm deep joint, or 3 linear metres of a 10mm wide x 10mm deep joint. Refer to the coverage table in the TDS for estimates based on various joint sizes.
Service Temperature Range: Once fully cured, Hypersil 911 performs reliably across an extremely wide temperature range from -62°C to +170°C, suitable for all Australian climate extremes.
Chemical Properties: As a 100% Neutral Cure Silicone, Hypersil 911 is low odour and non-corrosive. It cures by reacting with atmospheric moisture, releasing Methyl Ethyl Ketoxime (MEKO) during the process (ensure adequate ventilation). It has good resistance to general weathering and water.
Key Features of Pasco Hypersil 911
- 100% Neutral Cure Silicone: Provides excellent long-term durability, flexibility, and adhesion without corroding metals or reacting with alkaline substrates like concrete. Low odour compared to acetoxy silicones.
- Highly Flexible (± 25% Movement): Accommodates significant joint movement caused by thermal changes, vibration, or material expansion/contraction, ensuring seal integrity.
- Excellent UV & Weathering Resistance: Resists degradation from sunlight, rain, ozone, and temperature extremes, making it ideal for exposed applications throughout Australia.
- Superior Adhesion: Bonds strongly to a wide range of common construction and glazing materials, including glass, aluminium, steel, concrete, ceramics, and painted surfaces.
- Extensive Colour Range: Available in a broad selection of colours (including Translucent, White, Greys, Black, Earth Tones) to match various architectural finishes.
- Easy Application & Tooling: Non-slumping consistency allows for easy application in vertical and horizontal joints. Tools off smoothly for a professional finish.
- Low VOC Content: Contains only 31 g/L VOCs, contributing to better air quality on site.
Why Choose Pasco Hypersil 911:
- Long-Term Reliability: Trust in a 100% silicone formulation designed for durable performance against Australian weather conditions.
- Versatile Application: One sealant covers numerous common tasks in glazing, construction, and perimeter sealing, simplifying inventory.
- Substrate Compatibility Assurance: Neutral cure chemistry provides peace of mind when sealing against metals, concrete, and other sensitive substrates.
- Aesthetic Finish: Achieve the desired look with an extensive range of standard colours to complement building designs.
- Ease of Use for Professionals: Consistent quality, good gunnability, and smooth tooling properties support efficient and high-quality installation.
When to Choose Pasco Hypersil 911 versus Alternatives:
- Choose Hypersil 911 over Acetoxy Cure Silicone when: Sealing against metals (aluminium, steel), concrete, masonry, or plastics; when low odour is required (internal use); or when improved adhesion to certain substrates is needed.
- Choose Hypersil 911 over Polyurethane (PU) Sealants when: Superior UV stability is critical for long-term colour and flexibility retention in exposed joints, a wider service temperature range is needed, or paintability is *not* required.
- Choose Hypersil 911 over Acrylic Sealants when: Joint movement (±25% vs ±10-15%), weather resistance, UV stability, or water resistance are important factors (i.e., virtually all external or demanding internal applications).
- Consider other options when: The sealant needs to be painted (use paintable PU or Acrylic); for structural glazing applications (use specified structural silicones); for aquariums; for permanent water immersion; for trafficable joints; or for use on polycarbonate (use Pasco Hyperclear).
Trade-Specific Applications for Pasco Hypersil 911:
For Glaziers:
- General Window & Door Glazing: Reliable sealing between glass and frames (aluminium, steel, timber - check compatibility).
- Perimeter Sealing: Weather sealing around window and door frames where they meet the building structure (brick, concrete, cladding).
- Curtain Walls: Sealing non-structural joints and weather seals in curtain wall systems.
- Performance Benefits: Excellent adhesion to glass/metal, ±25% movement, UV stable, wide colour choice.
For Builders & Carpenters:
- Perimeter Sealing: Sealing gaps around installed windows, doors, and penetrations to prevent drafts and water ingress.
- Construction Joints: Sealing control joints or movement joints in facades, walls, and floors (non-trafficable).
- Sealing Fixtures: Non-structural sealing around vents, pipes, and other fixtures where flexibility and weather resistance are needed.
- Performance Benefits: Good movement capability, weather resistance, adheres to common building materials.
For Cladding Installers:
- Weather Sealing Joints: Sealing vertical and horizontal joints between cladding panels (e.g., fibre cement, metal composite panels - check compatibility).
- Perimeter Seals: Sealing around the edges of cladding systems where they meet other building elements.
- Performance Benefits: ±25% flexibility accommodates panel movement; excellent UV/weather resistance ensures long-term seal.
For Caulking Professionals:
- General Purpose Sealing: A reliable go-to sealant for a wide range of architectural sealing tasks requiring flexibility and durability.
- Colour Matching: Extensive colour range allows for matching to various substrates and finishes.
- Application Properties: Good tooling and non-slump characteristics facilitate neat, professional results.
- Performance Benefits: Versatile, durable, easy to work with.
Application Information
- Required Tools: Standard caulking gun (manual or battery), nozzle cutter, backing rod (open cell PE), tooling spatulas/tools, cleaning cloths, solvent (methylated spirits for glass/metal, mineral turpentine for immediate cleanup).
- Joint Design: Ensure correct joint width-to-depth ratio. Use backing rod to control depth and prevent three-sided adhesion. Recommended depths: Equal to width for 6-10mm joints, 10mm depth for 10-20mm joints, half width for 20-25mm joints.
- Tooling Technique: Dry tool immediately after application using appropriate spatula for a smooth, concave finish. Ensure sealant is pressed firmly against joint sides.
- Clean Up: Remove excess uncured sealant immediately with a cloth dampened with mineral turpentine. Cured sealant typically requires mechanical removal.
Storage and Shelf Life
- Storage Requirements: Store cartridges in a cool, dry place with temperatures kept below 28°C. Protect from direct sunlight and moisture.
- Shelf Life Information: Minimum 12 months from date of manufacture when stored correctly in original, unopened cartridges.
- Temperature Considerations: Avoid storing in very hot conditions. Ensure product is at a reasonable temperature before application for optimal consistency.
Certifications and Compliance
- While specific AS/ISO classifications aren't listed in this TDS, the product properties (±25% movement, neutral cure, UV stability) align with requirements for high-quality general-purpose architectural sealants used in Australian construction.
- Low VOC content (31 g/L) contributes positively to environmental considerations.
Frequently Asked Questions About Pasco Hypersil 911
Q: Is Pasco Hypersil 911 paintable?
A: No, Hypersil 911 is a 100% silicone sealant and cannot be painted over. Paint will not adhere properly to the cured silicone surface. Choose from the extensive range of colours available to match your application, or select a paintable sealant type (like polyurethane or acrylic) if painting is essential.
Q: Can I use Hypersil 911 on polycarbonate sheets (e.g., Lexan)?
A: No, the TDS specifically states not to use Hypersil 911 for polycarbonate plastic sheeting. Pasco recommends using their Hyperclear product for polycarbonate applications. Using the wrong sealant can cause cracking or adhesion issues with polycarbonate.
Q: Is Hypersil 911 suitable for sealing around natural stone tiles?
A: Caution is advised. While neutral cure silicones are generally better than acetoxy cures for stone, some natural stones can still be susceptible to staining (migration of silicone fluid into the stone pores). Always test Hypersil 911 on an inconspicuous area or offcut of the specific stone first to check for compatibility and potential staining before proceeding with the main application.
Q: How long does Hypersil 911 take to fully cure?
A: Full cure depends on the depth of the sealant, temperature, and humidity. For a typical 10mm deep joint at 25°C, it takes approximately 5-7 days to cure completely through. It will skin over much faster (8-10 minutes), allowing tooling, but full strength and properties develop over the longer cure period.
Q: Can I use Hypersil 911 to seal joints in a shower recess?
A: Yes, Hypersil 911 is suitable for sealing perimeter joints (wall/floor junctions, around fixtures) in showers and bathrooms due to its excellent water resistance and flexibility. However, it is not recommended for joints subject to permanent water immersion, such as the base of a shower floor if water tends to pool there constantly.
Q: What does 'Neutral Cure' mean for a silicone sealant?
A: Neutral cure means the sealant releases a neutral chemical (like an alcohol or oxime - in this case, MEKO) as it cures, rather than acetic acid (vinegar smell) like traditional acetoxy cure silicones. This makes it non-corrosive to metals and safe for use on alkaline materials like concrete and masonry. It also generally results in lower odour during application.
Use Pasco Hypersil 911 for:
- General Glazing: Sealing glass into frames (aluminium, timber*, steel*) in windows, doors, and shopfronts (*check compatibility/prep).
- Weatherproofing Joints: Sealing construction joints, expansion joints (non-trafficable), and control joints in facades and general construction.
- Building Cladding Seals: Sealing joints between cladding panels (metal, composite*, fibre cement*) to provide a weather seal (*check compatibility/prep).
- Perimeter Sealing: Creating weatherproof seals around window and door frames where they abut walls (brick, concrete, render, cladding).
- Curtain Walls: Sealing weather seals and non-structural joints in curtain wall systems.
- General Purpose Sealing: Versatile sealant for tasks requiring flexibility, durability, and UV resistance (e.g., sealing vents, skylights - non-polycarbonate).
- Kitchen & Bathroom: Sealing around benchtops, splashbacks (non-stone*), vanities, shower screens, and fixtures (*not for permanent immersion).
Why Use Pasco Hypersil 911 for:
- Durable Weather Seals: Provides long-lasting protection against rain, wind, and sun due to 100% silicone composition and UV stability.
- Accommodating Movement: ±25% flexibility prevents seals from failing when building materials expand, contract, or vibrate.
- Protecting Sensitive Materials: Neutral cure chemistry ensures no corrosion of metals or damage to alkaline substrates like concrete.
- Matching Building Finishes: Extensive colour range allows sealant joints to blend seamlessly with various architectural colours and materials.
- Professional Results: Easy application and tooling properties help trades achieve neat, high-quality sealant joints efficiently.
- Reducing Call-Backs: High performance and durability minimise the risk of premature seal failure and costly repairs.
How to apply Pasco Hypersil 911:
- Surface Preparation: Ensure joint surfaces are clean, dry, sound, and free from dust, oil, grease, rust, old sealant, or other contaminants. Clean glass and metals with methylated spirits, wiping dry with a clean cloth.
- Joint Design & Backing Rod: Ensure the joint is correctly designed for the expected movement (±25%). Select the appropriate diameter open cell polyethylene backing rod (allowing 25% compression) and insert it into the joint to control sealant depth and prevent three-sided adhesion. Refer to TDS for recommended depth based on joint width.
- Prepare Cartridge & Nozzle: Cut the tip off the cartridge seal. Cut the nozzle tip at a 45° angle to the desired bead size. Insert the cartridge into a standard caulking gun.
- Apply Sealant: Apply Hypersil 911 into the joint, ensuring firm, continuous pressure to wet out both sides of the joint completely. Avoid air bubbles. Maintain a consistent bead size.
- Tool Sealant: Within the skin time (8-10 minutes), immediately tool the sealant surface using a suitable clean spatula or tool. Apply light pressure to ensure good contact and achieve a smooth, concave finish that is flush with the adjoining surfaces.
- Clean Up: Remove any excess uncured sealant immediately from surfaces and tools using a cloth dampened with mineral turpentine. Cured sealant is difficult to remove and usually requires scraping or cutting.
Pasco Hypersil 911 limitations:
- Not Paintable: Paint will not adhere to the cured silicone surface. Select appropriate sealant colour.
- Not for Structural Glazing: Cannot be used where the sealant is the primary structural bonding agent for glass.
- Not for Aquariums: Not formulated or tested for aquarium safety.
- Not for Permanent Immersion: Unsuitable for joints constantly submerged in water (e.g., swimming pools, tanks, below waterline).
- Not for Trafficable Joints: Cannot withstand foot or vehicular traffic (e.g., floor expansion joints).
- Not for Polycarbonate: Specifically advised against for use on polycarbonate sheeting (use Pasco Hyperclear).
- Incompatible Materials: Avoid contact with bitumen, asphalt, tar, or certain rubbers/plastics that may bleed oils or plasticisers (e.g., EPDM, neoprene), which can cause discolouration or adhesion loss.
- Stone & Plastic Testing: Always test for staining and adhesion on natural/reconstituted stone and plastics before full application.
Safety precautions when using Pasco Hypersil 911:
- Personal Protective Equipment (PPE): Wear suitable protective clothing, chemical-resistant gloves (e.g., nitrile), and safety glasses or face shield. Avoid skin and eye contact.
- Ventilation: Use only in well-ventilated areas. Curing process releases Methyl Ethyl Ketoxime (MEKO), which can irritate respiratory system. Ensure good airflow, especially indoors.
- Handling: Keep out of reach of children. Avoid eating, drinking, or smoking while handling. Wash hands thoroughly after use.
- First Aid: Consult the Safety Data Sheet (SDS) for full details. Eyes: Rinse immediately with plenty of water for 15 mins, contact Doctor or Poisons Information Centre (Ph 13 11 26). Skin: Wash affected area with hand cleaner then soap and water. Inhalation: Move to fresh air, seek medical advice if irritation persists.
- Disposal: Dispose of cured sealant and empty cartridges according to local council regulations. Do not dispose of uncured product into drains or waterways.
Pasco Hypersil 911 can be used on the following substrates:
- Glass: All common types used in glazing.
- Metals: Aluminium (mill finish, anodised, powder coated*), Steel (mild, stainless, galvanised). Non-corrosive neutral cure is ideal.
- Concrete & Masonry: Cured concrete, brickwork, blockwork, render. Neutral cure prevents reaction with alkalinity.
- Ceramic Tiles: Glazed and unglazed tiles.
- Painted & Powder Coated Surfaces: Ensure coating is sound and well adhered. (*Test compatibility).
- Natural & Reconstituted Stone: *Testing on an inconspicuous area is essential* to check for potential staining or adhesion issues before full application.
- Most Plastics: *Testing is recommended*. Good adhesion generally expected to PVC, ABS etc., but compatibility can vary. *Specifically NOT for Polycarbonate*.
- Note: All surfaces must be clean, dry, sound, and free from contaminants. Use methylated spirits for cleaning glass/metals.
- Choosing a selection results in a full page refresh.