11
Pink 600ml Adheseal Hi-Flex Construction Plus sausage: MS hybrid sealant for ±50% joint movement, primerless construction ...
Pink 600ml Adheseal Hi-Flex Construction Plus sausage: MS hybrid sealant for ±50% joint movement, primerless construction ...

Adheseal Hi Flex Construction Plus MS Polymer Sealant

Low-modulus MS polymer sealant for high-movement façade, cladding and window-perimeter joints. ±50% movement with a high-build Easy Tool Low-Mess formula.

Vendor: Adheseal
SKU: 170300008
Availability: In Stock
$11.60
$11.60
Prices do not include GST
Guaranteed safe checkout
  • Apple Pay
  • Google Pay
  • Mastercard
  • Shop Pay
  • Visa
  • Secure SSL encrypted checkout
  • Fast, tracked shipping
  • Easy returns & support
Adheseal tool

Sealant Calculator

Not sure on how much sealant you'll need? Use our calculator to find out.

  • Width + depth presets
  • Instant quantity estimate
Shipping & Delivery

Flat-rate shipping $17.95 + GST (metro and standard zones). Excludes remote/regional/high-cost postcodes and certain items (DG, oversized, long-length, or bagged products 15 kg+). If your order includes any of these, we will contact you to arrange additional freight charges. Online purchases only.

Download Product Data

Download TDS Download SDS
Description  

Adheseal Hi-Flex Construction Plus is a low-modulus MS polymer joint sealant for high-movement façade, cladding, precast concrete and mechanically fixed window-perimeter joints. Its ±50% movement capability makes it a strong choice for exposed construction details where adjoining materials expand and contract at different rates.

Construction Plus is designed for installers who need a flexible, weather-resistant joint with easier application. The high-build Easy Tool Low-Mess formulation helps form a neat joint, while the cured hybrid polymer maintains elasticity without the staining associated with some conventional sealants.

Typical applications

  • Window and façade weatherseals: flexible perimeter sealing around mechanically fixed windows and adjacent façade elements.
  • External cladding joints: sealing moving joints between compatible façade panels, metalwork and supporting construction.
  • Precast and tilt-up panels: expansion and connection joints subject to thermal or structural movement.
  • Prefabricated buildings: movement joints between dissimilar building components.
  • General fabrication: selected aluminium seams, signs and mechanically assembled details where an elastic seal is required.

How it differs from other Hi-Flex products

Choose Construction Plus for a softer, high-movement construction weatherseal. Hi-Flex 50 suits general joint sealing and selected membrane fillets; the firmer Hi-Flex 60 is positioned for higher-modulus panel and component bonding.

Before applying

Joints must be sound, clean and dry, with backing rod or bond-breaker tape to prevent adhesion to the base. Confirm adhesion and priming requirements on coated metals, composites, sensitive substrates and critical façade installations. Paint compatibility should be tested, particularly on moving joints.

Not suitable for structural glazing, mirror bonding, aquariums or continuous water immersion. Avoid bitumen, natural rubber, EPDM and materials that release oils or plasticisers. Stain-test natural stone.

Common Questions  

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

Can it be painted?
Yes, after cure with compatible coatings. Rigid coatings may crack as the joint moves.

Can it be used around swimming pools?
No. It is not for long-term immersion or internal pools with high chlorine exposure.

Is it suitable for window perimeter and facade joints?
Yes. Those are key applications for this low-modulus, high-movement sealant.

Uses & Benefits  
Low-modulus MS polymer sealant for perimeter windows, facade and cladding joints, precast panels and other high-movement construction joints. Accommodates ±50% joint movement to ASTM C 719 and complies with ASTM C 920 Class 50. Service temperature range is -40°C to +100°C after cure. Non-corrosive hybrid chemistry contains no isocyanates, solvents or acids. Can be painted with compatible acrylic, oil and rubber-based coatings after cure.
How To Apply  
Use on clean, dry, sound surfaces. Concrete must cure for at least 28 days. For aluminium, stainless steel, PVC, galvanised steel and glazed tile in demanding applications use Adheseal 50A. For concrete and brick use Everflex Supaprime. Apply sealant 30 minutes to 2 hours after priming. 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. Apply between 5°C and 40°C and tool within about 5 minutes. For adhesive bonding, apply a triangular bead and compress to at least 2mm.
Limitations and Safety Info  
Do not use for long-term water immersion, aquariums or internal swimming pools with high chlorine exposure. Do not use in totally confined spaces. Do not use on lead or copper, bituminous surfaces, natural rubber, EPDM, or materials that leach oils, plasticisers or solvents. Do not use for structural glazing or mirror bonding. Stain-test 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  
  • Concrete, masonry, brick and precast panels.
  • Timber, fibre cement, plasterboard and porcelain.
  • Aluminium, stainless steel, galvanised steel and powder-coated metals.
  • Compatible plastics, fibreglass and waterproof membranes.
  • Natural stone only after stain testing.

Adheseal Hi Flex Construction Plus MS Polymer Sealant Physical Properties

Adheseal Hi Flex Construction Plus MS Polymer Sealant Physical Properties
Property Value
Material Type Hybrid MS Polymer
Curing System Neutral
Density 1.48 ± 0.05 g/cm³
Tensile Strength 0.65 MPa
Elongation ~1100% (ASTM D412)
Movement Capability ±50%
Shore A Hardness ~25 (ASTM D2240)
Modulus 0.41 MPa
Pot Life ≈25 minutes at 23°C and 50% RH
Skin Time ≈10–15 minutes at 23°C to 25°C and 50% RH
Application Temperature +5°C to +40°C
Service Temperature -40°C to +100°C
UV Resistance 500 h – Good (meets industrial standard)
Chemical Resistance Excellent to water & detergents, Moderate to diluted acids/alkalis, Petrol & oil short periods
Coverage Rate 6 mm × 6 mm: 16.7 m, 10 mm × 10 mm: 6.0 m, 12 mm × 12 mm: 4.2 m, 20 mm × 10 mm: 3.0 m, Triangular 10 mm × 10 mm: 12 m
Substrate Compatibility Paintable (test first, non-flexible paints may crack)
VOC Content 1.10% (USEPA)
Certifications & Standards Class 50
Shelf Life 12 months (original packaging)
Storage Conditions Cool, Dry, 10°C to 35°C
Specific Gravity 1.45 +/- 0.05 (ASTM D1475)
Consistency Non-Sagging Paste
Clean Up Xylene / Adheseal Citrus Wipes (for skin)
Staining Non-staining (ASTM C510 & ASTM C1248)

Adheseal Hi Flex Construction Plus MS Polymer Sealant - Use Cases

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

Civil Construction

Facade Panel Movement Joints

When sealing large external panels like curtain walls or precast facade elements subject to significant structural movement.

Its ±50% movement capability and low modulus design accommodate thermal and structural shifts, preventing weather ingress and premature failure.

  • Movement capability ±50% ASTM C719
  • Complies ASTM C920-CLASS 50
  • Non-staining ASTM C1248
  • Hardness Shore A 25

Civil Construction

Precast Concrete Expansion Joints

Sealing expansion joints in precast concrete or tilt-up panels where thermal and structural movement is expected.

Offers robust flexibility and non-staining properties for cementitious substrates, accommodating significant joint movement.

  • Movement capability ±50% ASTM C719
  • Non-staining ASTM C510 concrete
  • Hardness Shore A 25
  • Compatible with concrete, brick

Glazing

Window Perimeter Weatherseal

Sealing around window and door frames exposed to UV, weathering, and dynamic building movement.

Provides durable, flexible weatherproofing with excellent UV and weathering resistance, ensuring long-term seal integrity.

  • Movement capability ±50% ASTM C719
  • Excellent UV and weathering resistance
  • Primerless adhesion on aluminium
  • Non-corrosive to galvanized steel

Alternative Products

Vendor
Example product title
From $11.60
From $11.60
Vendor
Example product title
From $11.60
From $11.60
Vendor
Example product title
From $11.60
From $11.60
Vendor
Example product title
From $11.60
From $11.60
Vendor
Example product title
From $11.60
From $11.60
Vendor
Example product title
From $11.60
From $11.60

Need Help with Adheseal Hi Flex Construction Plus MS Polymer Sealant?

Need more information about this product? Hit the button below and reach out to one of our experts now.

Get In Contact
Recently Viewed Products