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Seamless integration with your waterproofing system is critical. Hi-Flex 50 ensures your flexible seals and bond breakers perform without compromise. This MS Polymer sealant delivers the high movement capability and robust adhesion needed to prevent system failure. It maintains waterproofing integrity across crucial joints and transitions. Expect durable, flexible seals that last.
Hi-Flex 50 was engineered as a high-performance, flexible MS Polymer sealant specifically for the Adheseal Everflex waterproofing membrane range. It creates an ideal bond breaker and sealant that prevents system incompatibilities. This formulation ensures long-term waterproofing integrity, offering superior flexibility, UV and weathering resistance, and outstanding primeless adhesion across a range of substrates. It resists gassing and bubbling, even in humid conditions.
Hi-Flex 50 is easy to gun, non-slump, and tools smoothly. Apply it within temperatures of 5°C to 40°C. Tool immediately after application, within 10 minutes, using a moistened spatula for a smooth finish. For cleanup, wet sealant and tools respond to Xylene. Remove cured sealant mechanically or by softening with solvent and scraping. For skin cleaning, use Adheseal Hand Wipes.
Surface preparation is key. Ensure all surfaces are sound, dry, and clean. For non-porous substrates like aluminium or waterproof membranes, roughen lightly then clean and pre-treat with Adheseal 50A Surface Prep. For porous substrates like concrete or brick, prime with Everflex Supaprime Sealant Primer. Always control joint depth with a compatible backer rod to prevent three-sided adhesion.
Hi-Flex 50 commonly functions as the final flexible seal within multi-stage waterproofing systems. For example, in parapet and hood assemblies, it follows the application of Everflex VBS Bitumen Primer and Everflex WPUV UV-Stable Waterproofing Membrane membranes, creating a durable and flexible finish layer before any topcoat. This ensures all critical movement joints and transitions are sealed, preventing water ingress at vulnerable points in the build-up. Its proven compatibility with the Everflex range makes it a reliable choice for system integrity.
When selecting a flexible sealant from the Adheseal Hi-Flex family, consider the specific demands of your project. Choose Hi-Flex 50 for its superior flexibility (+/- 25% movement), excellent UV and weathering resistance, and critical compatibility as a bond breaker with Adheseal Everflex waterproofing membranes. Its non-staining and non-gassing properties are ideal for applications where appearance and long-term integrity matter, particularly in humid or exposed conditions. If your project does not require these specific waterproofing system compatibilities or high-performance attributes, other Hi-Flex products may offer a different balance of properties.
Yes, it is designed for compatibility. Hi-Flex 50 works as a bond breaker and fillet sealant with Adheseal Everflex Aqua-Ban, WPM, WPUV, and SMP membranes.
Hi-Flex 50 is non-staining as per ASTM C510. However, for all stone applications, a preliminary stain testing program is recommended. For marble and granite, Adheseal S100 is typically recommended after testing.
No, Hi-Flex 50 is not for internal swimming pool applications. It should not be exposed to high levels of chlorine or long-term water immersion.
Hi-Flex 50 provides a movement capability of up to +/- 25%. This rating is confirmed by ASTM C719 testing, making it suitable for dynamic construction joints.
No, it is resistant to gassing. The formulation is designed to eliminate bubbling even in high humidity applications, ensuring a clean finish.
| Application | Key benefit | Primary trades |
|---|---|---|
| Bond breaker for waterproofing membranes | Ensures flexible joints compatible with Everflex membranes, preventing stress points and membrane failure. | Waterproofers, Builders |
| Sealing construction joints in facades and panels | Offers +/- 25% movement capability (ASTM C719) with excellent UV and weathering resistance, maintaining a durable, flexible seal. | Builders, Commercial Facade Contractors |
| Sealing joints in prefabricated buildings or concrete panels | Provides a permanently elastic and dustproof seal with strong adhesion, accommodating differential thermal movement. | Precast Concrete Installers, Builders |
| General perimeter and expansion joint sealing | Resists gassing and bubbling, even in high humidity, and is non-staining (ASTM C510), ensuring a clean, long-lasting finish. | Builders, Tilers, Glaziers |
| Bonding lightweight components and display signs | Achieves strong, primeless adhesion on common building materials including powder coat, fibreglass, and various metals. | Sign Installers, Shop Fitters, Manufacturers |
Ensure substrates are clean, dry, and free from oil, dust, or curing agents. For porous surfaces like concrete, allow a minimum 28-day cure and wipe using a two-cloth method with Xylene. For metal or powder-coated surfaces, lightly abrade and wipe with Adheseal 50A.
Prime using Everflex Supaprime and allow 30–120 minutes drying time before applying sealant.
No primer usually required. Use Adheseal 50A surface prep for metals and waterproof membranes.
Design joints with a 2:1 width-to-depth ratio. Use open-cell backer rod to control sealant depth and avoid three-sided adhesion by using bond breaker tape. Mask joint edges for clean lines if needed.
Min. 5mm width/depth, backer rod recommended above 10mm.
Min. 12mm wide. Ensure UV exposure is considered in dimensioning.
Cut nozzle at 45° angle for joint sealing or 90° for adhesive use. Insert 600ml sausage into a sealant gun and apply a continuous bead, pushing the sealant forward to avoid air entrapment.
Use a 45° nozzle and fill joint fully. Tool within 10 minutes using a moistened spatula for a smooth finish.
Use a triangular bead, approximately twice as high as it is wide. Press surfaces together to compress bead to ≥2mm.
Allow Hi-Flex 50 to cure at a rate of approximately 3mm per 24 hours (25°C, 50% RH). Paintable with acrylic and oil-based paints. Ensure the sealant is fully cured before painting.
Test flexibility of coating. Rigid coatings may crack under joint movement.
Use Xylene for tools while wet. Cured sealant must be removed mechanically.
Wear gloves and safety glasses. Nitrile Rubber gloves are suitable for intermittent contact. Always wash hands before eating, drinking, or using the toilet.
Natural ventilation is adequate under normal use conditions. Ensure proper ventilation in enclosed spaces during application.
Store in a cool, dry, well-ventilated place, out of direct sunlight and away from foodstuffs. Keep containers closed when not in use. Dispose of according to state or local regulations.
Proper surface preparation is crucial for adhesion and long-term performance. This guide outlines requirements for common materials.
Includes aluminium, waterproof membranes, anodized aluminium, stainless steel, PVC, galvanised steel, powder coated metals, and glazed tiles.
Surface prep: Slightly roughen the surface with a fine abrasive pad. Clean thoroughly using the two-wipe process with a suitable cleaner/solvent like Xylene.
Primer: Optional, but recommended for optimal adhesion in critical high-performance applications (e.g., multi-story buildings, highly stressed joints, extreme weather, or water exposure). Use Adheseal 50A surface prep. Apply with a clean cloth and allow 30 minutes to 2 hours before sealant application.
Includes concrete (cured 28 days minimum), aerated concrete, cement-based renders, mortars, and bricks.
Surface prep: Ensure surfaces are structurally sound, dry, and free of dust, loose material, oils, grease, and curing compounds. Substrate must be free from surface water and continual dampness.
Primer: Optional, but recommended for optimal adhesion and long-term performance in critical applications. Use Everflex Supaprime applied by brush. Allow 30 minutes to 2 hours before sealant application. Avoid excessive application to prevent puddling.
For metals like copper, brass, titanium-zinc, and plastics like PVC, an adhesion test is advised. Always perform compatibility tests if contact with potentially incompatible materials is expected.
| Property | Value |
|---|---|
| Product Type | MS Polymer |
| Curing System | Neutral, Moisture Curing |
| Tack-Free Time | 30 minutes @ 25°C, 50% RH |
| Density Specific Gravity | 1.64 +/- 0.05 ASTM D1475 |
| Flammability | Non Flammable |
| Cure Rate | 3.0mm per 24hrs |
| Consistency | Non-Sagging, Smooth Thixotropic |
| Elongation At Break | 200% approx. ASTM D412 |
| Suitable Joint Width | 5 – 50mm |
| Application Temperature | 5°C to 40°C |
| Service Temperature | -40°C to 100°C |
| Movement Capability | +/- 25% ASTM C719 |
| Hardness Shore A | 35 approx. ASTM D2240 |
| VOC | 1.5% (USEPA) |
| Shelf Life | 12 months |
| Staining | Non-staining as per ASTM C510 |
| Colour | Grey (RAL 7047) |
| Packaging | 600ml Sausage |
Here are some common examples on where Adheseal Hi-Flex 50 used by our customers.
