ACTFLEX 75FC 600ml Polyurethane Joint Sealant
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ACTFLEX 75FC 600ml Polyurethane Joint Sealant

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ACTFLEX 75 FC stands as a versatile and high-performance polyurethane elastic joint sealant, engineered to meet diverse sealing requirements across various applications. Used to seal and provide waterproofing to corner junctions, gaps, penetrations, cracks, and joints.

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ACTFLEX 75FC 600ml Polyurethane Joint Sealant

ACTFLEX 75FC 600ml Polyurethane Joint Sealant

The Waterproofing Shop

Pickup available, usually ready in 24 hours

22/872 Canterbury Road
Roselands NSW 2196
Australia

+61280213517
ACTFLEX 75FC 600ml Polyurethane Joint Sealant
$250.00
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Frequently bought together

Waterproofing Systems Built for Australian Conditions

Engineered to perform in the most demanding environments.

Pool Waterproofing System

Designed for permanent water immersion. Chlorine, salt & UV stable.

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Retaining Wall System

High performance negative pressure waterproofing for below ground structures.

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Tank Waterproofing System

Potable water safe. Ideal for concrete water tanks and reservoirs.

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System Build-Up Guide

Correct application makes all the difference.

View All Details

Pool System Build-Up

  • 1 Concrete Substrate
  • 2 Crack Repair (if required)
  • 3 ACTFLEX FLEXPLUS
  • 4 ACTFLEX HYDROPLUG
  • 5 ACTFLEX AT MESH
  • 6 ACTFLEX 988 CWP (2 Coats)
  • 7 Tile Adhesive
  • 8 Pool Finish
Pool System Build-Up

Retaining Wall System Build-Up

  • 1 Concrete Substrate
  • 2 Crack Repair (if required)
  • 3 ACTFLEX MS PRO
  • 4 ACTFLEX AT MESH
  • 5 ACTFLEX 988 CWP (2 Coats)
  • 6 Protection Board (Optional)
  • 7 Drainage System
  • 8 Backfill
Retaining Wall System Build-Up

Tank System Build-Up

  • 1 Concrete Substrate
  • 2 Crack Repair (if required)
  • 3 ACTFLEX FLEXPLUS
  • 4 ACTFLEX AT MESH
  • 5 ACTFLEX 988 WMP (2 Coats)
  • 6 Protective Coating (Optional)
  • 7 Water
Tank System Build-Up

Technical overview

ACTFLEX 75FC is a high-performance, single-component moisture-curing polyurethane joint sealant and construction adhesive. Forms a flexible, durable, weather-resistant bond that accommodates differential movement between dissimilar materials. Non-sag thixotropic consistency suitable for vertical and horizontal joints from 10–35 mm wide.

Key applications

  • Sealing expansion & movement joints
  • Bonding dissimilar materials
  • Waterproofing penetrations & overlaps
  • Crack sealing in concrete & masonry
  • Sealing joints in exposed external environments

Surface suitability

  • Concrete
  • FC sheeting
  • Timber
  • Metals
  • PVC (with primer)

Not resistant to alcohols, organic acids, chlorinated hydrocarbons or concentrated fuels. Not vapour permeable. Joint design must follow a 1:1 or 2:1 width-to-depth ratio for proper performance.

Real Projects. Real Results.

View All Projects
  • Pool Renovation Pool Renovation Before After

    Pool Renovation

    Gold Coast, QLD

  • Below Ground Retaining Wall Below Ground Retaining Wall Before After

    Below Ground Retaining Wall

    Sydney, NSW

  • Concrete Water Tank Concrete Water Tank Before After

    Concrete Water Tank

    Perth, WA

  • Commercial Podium Commercial Podium Before After

    Commercial Podium

    Melbourne, VIC

  • Before After

    Swimming Pool Construction

    Brisbane, QLD

How to install

Watch the install

Step-by-step from prep to top coat. Filmed on the tools, not in a studio.

Watch the install poster

Why Choose

The Waterproofing Shop?

We supply premium waterproofing products backed by expert advice, fast service and real-world experience.

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Owned & Operated
30+ Years in the Waterproofing Industry 30+ Years in the
Waterproofing Industry
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in Stock
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Australia Wide
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Support

Frequently asked questions

View all FAQs
  • What is ACTFLEX 75FC used for?
    Compatibility

    75FC is a single-component moisture-curing polyurethane joint sealant for sealing joints, crack filling, bonding, and waterproofing. Bonds to concrete, fibre cement, timber, metals, and PVC (with primer). Non-sag thixotropic - works on both vertical and horizontal joints.

  • What movement does it accommodate?
    Performance

    75FC achieves 550% elongation at break with tear resistance ≥6 N/mm. Suitable for expansion joints, perimeter joints, and dynamic structural joints subject to thermal and load cycling.

  • How is it applied?
    Installation

    Load the 600ml sausage into a heavy-duty caulking gun, prime the substrate if needed (with 700 PU Primer or SuperBond 007 on non-porous surfaces), apply foam backer rod into the joint, then gun the bead and tool with a soapy-water tool.

  • Joint dimensions and coverage?
    Compatibility

    Joint ratios: ≥12mm width = 2:1 width-to-depth, <12mm = 1:1. Approximately 10-12 linear metres of 10x10mm joint per 600ml sausage. Cures at 3.5mm per 24 hours.

  • Service environment?
    Compliance

    Service temperature -10°C to +65°C once cured. Immersion-ready after 5 days full cure. Skin time 65 minutes at 25°C/50% RH gives ample tooling time.

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