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Adheseal Hi-Flex 50 pink 600ml sausage, MS Polymer hybrid sealant for ±25% joint sealing, aluminium bonding, façade waterp...
Adheseal Hi-Flex 50 pink 600ml sausage, MS Polymer hybrid sealant for ±25% joint sealing, aluminium bonding, façade waterp...
Adheseal Hi-Flex 50 pink 600ml sausage, MS Polymer hybrid sealant for ±25% joint sealing, aluminium bonding, façade waterp...
Adheseal Hi-Flex 50 pink 600ml sausage, MS Polymer hybrid sealant for ±25% joint sealing, aluminium bonding, façade waterp...

Adheseal Hi Flex 50 Hybrid MS Polymer Sealant

MS polymer hybrid sealant for construction joints and compatible waterproofing membrane fillets. ±25% movement, with strong adhesion and a Shore A 35 cured profile.

Vendor: Adheseal
SKU: 170300003
Availability: In Stock
$11.60
$11.60
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Description  

Adheseal Hi-Flex 50 is a high-modulus MS polymer hybrid sealant for construction joints, prefabricated panels and fillets beneath selected waterproofing membranes. It combines ±25% joint movement with strong adhesion to many building materials, helping installers form flexible, neat joints without relying on a traditional polyurethane sealant.

Its particularly useful role is in waterproofing preparation. Hi-Flex 50 can be used as a fillet sealant or bond-breaker detail with compatible Everflex membrane systems, including selected Aqua-Ban, WPM, WPUV and SMP applications. System compatibility and the specified membrane detailing still govern the installation.

Common applications

  • Waterproofing details: forming compatible wall–floor junction fillets and bond-breaker details before membrane application.
  • Concrete and prefabricated panels: sealing movement and connection joints in compatible building elements.
  • Metal fabrication: sealing suitable seams and bolted lap joints between adjoining components.
  • Light-duty assembly: fixing compatible lightweight components such as acoustic ceiling tiles or display elements.

Hi-Flex 50, Hi-Flex 60 or Construction Plus?

Choose Hi-Flex 50 when sealing and membrane-detail compatibility are the main priorities. Hi-Flex 60 has a firmer, higher-modulus cured profile for demanding flexible bonding, while Hi-Flex Construction Plus is the softer, higher-movement option for exposed façade and window-perimeter joints.

Application considerations

Joints need sound, dry faces and the correct backing-rod depth; prevent three-sided adhesion. Hi-Flex 50 bonds to many common substrates without primer under suitable conditions, but critical joints, variable coatings and membrane interfaces still require appropriate preparation and compatibility testing.

Not suitable for continuous immersion, aquariums, structural glazing or mirror bonding. Avoid bitumen, EPDM, natural rubber and plasticiser-releasing surfaces, and stain-test sensitive natural stone.

Need to compare the joint-sealing grades? Browse our Hybrid MS Polymer Sealants range for movement capability and intended applications.

Common Questions  

How much movement can Hi-Flex 50 accommodate?
It is rated for ±25% joint movement to ASTM C 719.

Can Hi-Flex 50 be used under waterproofing membranes?
Yes. It is compatible with selected Everflex systems including Aqua-Ban, WPM, WPUV and SMP.

Can it be used in swimming pools?
No. It is not suitable for continuous immersion or internal pools with high chlorine exposure.

Does it contain isocyanates?
No. The formulation contains no isocyanates, solvents or acids.

Uses & Benefits  
Neutral-cure MS polymer sealant for construction joints, prefabricated concrete panels and bond-breaker details under selected Everflex waterproofing membranes. Accommodates ±25% joint movement to ASTM C 719. Service temperature range is -40°C to +100°C after cure. Contains no isocyanates, solvents or acids and is non-corrosive to galvanised and zinc-coated steel. Compatible with selected Everflex membranes including Aqua-Ban, WPM, WPUV and SMP.
How To Apply  
Use on clean, dry substrates. Design joints at a 2:1 width-to-depth ratio. Internal joints require at least 5mm width and depth; external joints require at least 12mm width. For joints deeper than 10mm use open-cell backing rod about 25% larger than the joint width. Do not puncture closed-cell backer rod. For concrete, aerated concrete, brick and mortar in demanding applications use Everflex Supaprime. For non-porous metals and plastics lightly abrade and use Adheseal 50A. Allow primers at least 30 minutes and no more than 2 hours before sealing. For adhesive use, apply a triangular bead and compress to at least 2mm.
Limitations and Safety Info  
Do not use for continuous immersion or internal swimming pools with high chlorine exposure. Do not use in totally confined spaces. Do not use on lead, copper, brass, titanium-zinc, bituminous surfaces, natural rubber or EPDM. Do not use for structural glazing or mirror bonding. Stain-test natural stone before use. Do not apply where active moisture-vapour transmission can cause bubbling. Keep uncured sealant away from cleaning agents, solvents and alcohol.
Suitable Substrates  
  • Masonry, concrete, brick and fibre cement board.
  • Aluminium and powder-coated metals.
  • Timber, plasterboard, stone, porcelain and fibreglass.
  • Rubber and compatible plastics.
  • Selected Everflex waterproofing membranes.

Adheseal Hi Flex 50 Hybrid MS Polymer Sealant Physical Properties

Adheseal Hi Flex 50 Hybrid MS Polymer Sealant Physical Properties
Property Value
Product Type MS Polymer
Curing System Neutral, Moisture Curing
Tack Free Time 30 minutes @ 25°C, 50% RH
Specific Gravity 1.64 +/- 0.05 ASTM D1475
Cure Rate 3.0mm per 24hrs
Consistency Non-Sagging, Smooth Thixotropic
Elongation 200% approx. ASTM D412
Joint Width 5 – 50mm
Application Temperature 5°C to 40°C
Service Temperature -40°C to 100°C
Movement Capability +/- 25% ASTM C719
Shore A Hardness 35 approx. ASTM D2240
VOC Content 1.5% (USEPA)
Shelf Life 12 months
Staining Non-staining as per ASTM C510
Clean Up Xylene, Skin Adheseal citrus

Adheseal Hi Flex 50 Hybrid MS Polymer Sealant - Use Cases

Here are some common examples on where Adheseal Hi Flex 50 Hybrid MS Polymer Sealant used by our customers.

Construction

Flexible building facade joints

Sealing exterior expansion and control joints in concrete panels, metal cladding, or around window/door reveals.

Its high movement capability and excellent UV resistance create durable, non-staining, weather-tight seals in exposed architectural elements.

  • +/- 25% movement ASTM C719
  • Excellent UV resistance
  • Non-staining ASTM C510
  • Service temp -40°C to 100°C

Sheet Metal

Bonding lightweight panels and trim

Adhering aluminium composite panels, facade trim, display signs, or marine fibreglass requiring flexible, non-corrosive bonds.

Offers strong, flexible, primeless adhesion to various surfaces, resisting corrosion and ensuring long-term aesthetic and structural integrity.

  • Primeless adhesion to powder coat
  • Non-corrosive to galvanized steel
  • 200% elongation at break
  • Low VOC 1.5% USEPA

Waterproofing

Waterproofing membrane bond breaker

Prepare concrete roofs, balconies, or podiums for a flexible water-based waterproofing membrane system.

Its MS polymer formulation ensures compatibility with Everflex water-based membranes, providing a flexible, non-staining seal at movement joints for system longevity.

  • Compatible with Everflex WPUV membranes
  • Movement capability +/- 25% ASTM C719
  • Non-bleeding, non-staining ASTM C510
  • Cure rate 3mm per 24 hours

Waterproofing

Wet area waterproofing joints

Create flexible bond breakers and seals in showers, bathrooms, or laundries prior to internal membrane application.

This MS polymer sealant is compatible with internal Everflex membranes, providing a durable, mould-resistant, and elastic joint to prevent membrane failure.

  • Compatible with Everflex Aqua-Ban membranes
  • Resists mould and mildew growth
  • Service temperature -40°C to 100°C
  • Low VOC 1.5% (USEPA)

Roofing

Exposed Exterior Detailing Sealant

Sealing perimeter junctions, flashings, and penetrations on exposed concrete roofs, parapets, and balconies where UV, weathering, and paintability are essential for durability and aesthetics.

As an MS polymer sealant, it offers excellent UV and weathering resistance, maintaining flexibility and adhesion across various building materials. Paintability allows for seamless integration into finished architectural schemes without compromising performance or long-term durability.

  • Excellent UV and weathering resistance
  • Paintable with acrylic, oil, and rubber-based paints
  • Non-bleeding / non-staining (ASTM C510)
  • Non-corrosive to galvanized steel and concrete

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