Forspec ACTFLEX PU300 22kg kit comprising PU300 single-line semi-hard polyurethane foam and PU300 Accelerator for fast-reacting crack injection and leak sealing applications.
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ACTFLEX PU300 22kg Kit Hydrophobic Polyurethane

Sale price$638.00
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ACTFLEX PU300 with Accelerator is a hydrophobic polyurethane crack injection resin designed for efficient and controlled expansion. With an adjustable reaction time using the accelerator liquid, this resin requires minimal water at the injection site. Upon activation, it expands up to 20 times its original size, effectively filling voids and sealing leaks. Ideal for basements, car parks, retaining walls, curtain walls, and various structural cracks, ACTFLEX PU300 ensures long-lasting waterproofing and durability.

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Pickup available at The Waterproofing Shop

Usually ready in 24 hours

Forspec ACTFLEX PU300 22kg kit comprising PU300 single-line semi-hard polyurethane foam and PU300 Accelerator for fast-reacting crack injection and leak sealing applications.

ACTFLEX PU300 22kg Kit Hydrophobic Polyurethane

The Waterproofing Shop

Pickup available, usually ready in 24 hours

22/872 Canterbury Road
Roselands NSW 2196
Australia

+61280213517
ACTFLEX PU300 22kg Kit Hydrophobic Polyurethane
$638.00
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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.

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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

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.

100% Australian Owned & Operated 100% Australian
Owned & Operated
30+ Years in the Waterproofing Industry 30+ Years in the
Waterproofing Industry
Thousands of Products in Stock Thousands of Products
in Stock
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Australia Wide
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Support

Frequently asked questions

View all FAQs
  • What is ACTFLEX PU300 used for?
    Compatibility

    PU300 is a hydrophobic polyurethane crack injection with an adjustable reaction profile - the 2-component design (resin + accelerator) lets you tune the cure speed to match the specific crack and water conditions on site.

  • How does the adjustable cure work?
    Performance

    Mix 10:1 base resin to accelerator for controllable cure timing. Foaming time 150-600 seconds depending on accelerator dose. Faster cure for high-flow leaks, slower cure for deep penetration in dry cracks.

  • Specifications?
    Installation

    Viscosity 450-600 mPa·s. Bond strength to concrete exceeds 2.28 MPa. Elongation greater than 100% (thick) or 250% (thin film). Density 1.12-1.2 g/cm³. Apply at greater than 10°C ambient.

  • When should I use PU300 vs PU200?
    Compatibility

    Use PU300 when you need adjustable cure timing for difficult conditions (heavily wet cracks, deep structural cracks). Use PU200 for standard hydrophobic injection where the fixed cure profile works.

  • What does the cured foam look like?
    Performance

    Light brown closed-cell hydrophobic foam. Immediately waterproofs cracks on water contact. 12-month shelf life when stored sealed. Safe for indoor work with appropriate ventilation.

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