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Price Per Box: $9.81
Hi-Flex Construction +: A Technical Overview
Hi-Flex Construction + is a single-component, high-build MS polymer hybrid sealant that delivers primerless adhesion on most common construction substrates. The low-modulus formulation accommodates ±50% joint movement with excellent UV and weathering resistance, even in harsh Australian conditions. The Easy Tool – Low Mess formula guns smoothly and finishes cleanly, forming a permanent, elastic, dust-proof seal that resists bubbling in high humidity. Non-corrosive and low-VOC, it’s suitable for internal and external applications where reliability and clean presentation matter.
±50%
Joint Movement Capability (ASTM C920 Class 50)
Core Features & Specifications
- MS Polymer Hybrid; single-component, high-build; low odour; low VOC.
- Primerless adhesion to most non-porous substrates; strong bond on common building materials.
- Movement capability ±50%; low modulus for stress relief in dynamic joints.
- Excellent UV & weather resistance; non-staining, non-bleeding finish.
- Cure rate ~2–3 mm/24 h (at 23–25°C, 50% RH); skin ~10–15 min; working time ~25 min.
- Service temp −40°C to +100°C; application +5°C to +40°C.
- Shore A ~29 (14 days); elongation >600% (ISO 37); modulus ~0.41 MPa @100% (ASTM D412).
- Lap shear ~0.65 MPa (ASTM C961); UV resistance: 500 h – Good.
- Colours: White (9003), Grey (7047), Black (9011); 600 ml sausages.
The Hi-Flex Construction + Advantage
- Saves time: primerless on most non-porous substrates and easy tooling cuts clean-up and labour.
- Fewer call-backs: elastic recovery and low modulus manage movement without cracking.
- Site-tough: resists gassing/bubbling in humid conditions for a consistent finish.
- Versatile: bonds/seals across metals, masonry, timber, plastics and coated substrates.
- Professional finish: non-staining, paintable (test first; non-flexible paints may crack).
Proactive Troubleshooting
Scenario: Three-sided adhesion in facade joints
Potential Outcome: Restricted movement causes cohesive/adhesive failure or substrate stress.
Adheseal Best Practice: Use correct backer rod or bond-breaker tape to ensure two-sided adhesion per joint design guidance.
Scenario: Applying over dust, release agents or damp concrete
Potential Outcome: Poor adhesion and bubbling; premature failure.
Adheseal Best Practice: Clean using the two-wipe method with suitable solvent; ensure substrates are dry and concrete is cured (≥28 days) before application.
Applications in Practice: Trade Scenarios
For Builders (On-Site Applicator): Precast/Tilt-Up Expansion Joints
The Professional's Challenge
Movement and thermal cycling on exposed panels demand a flexible, UV-stable sealant that tools cleanly and stays put without primer delays.
The Adheseal Solution
Design joints at ~2:1 (width:depth). For 20 mm width, target ~10 mm depth with backer rod. Gun Hi-Flex Construction + and tool within 10–15 min for a smooth, elastic finish rated to ±50% movement.
Best Practice Note
Mask edges for crisp lines and remove tape before skin forms. Avoid trapping air while filling—continuous, steady bead prevents bubbles.
For Glaziers (Specifier/Installer): Perimeter Window Sealing
The Professional's Challenge
Modern facades require primerless bonding to powder-coated aluminium and glass with reliable UV stability and neat, low-mess presentation.
The Adheseal Solution
Lightly abrade non-porous frames, clean with appropriate surface prep, then apply a continuous bead and tool off for a weather-tight, non-staining seal that can be painted if required (test compatibility).
Best Practice Note
Maintain two-sided adhesion around frames by using bond-breaker tape on flat interfaces to allow thermal movement without stress.
For Fabricators (Business Owner/Operator): Aluminium & Panel Assembly
The Professional's Challenge
Need a clean, non-corrosive adhesive/sealant to bond dissimilar materials and manage differential movement with minimal rework.
The Adheseal Solution
Apply a triangular bead (nozzle cut at 90° then wedged) and compress parts to ≥2 mm final bond line. The low-modulus, high-elongation hybrid manages thermal mismatch without print-through.
Best Practice Note
For critical bonds, pre-treat metals and plastics as directed and verify adhesion with site pull tests before production runs.
Frequently Asked Questions
Do I need a primer on powder-coated aluminium or glazed tiles?
Usually no—Hi-Flex Construction + achieves strong primerless adhesion on many non-porous substrates. For critical or high-exposure applications, light abrasion and surface prep are recommended, with adhesion testing prior to installation.
What joint design should I use?
Aim for a ~2:1 width:depth ratio. Internal joints min 5 mm width/depth; external joints min 12 mm width. Use backer rod for joints >10 mm deep and avoid three-sided adhesion with bond-breaker tape.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Perimeter sealing of windows | Primerless adhesion, clean tooling, UV stability | Glaziers, Builders |
| Curtain walls & facade panels | Low modulus manages thermal movement | Glaziers, Facade Contractors |
| Precast / tilt-up expansion joints | ±50% movement; durable weather seal | Builders |
