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Flash Harry Liquid Plastic | 20L, White

Original price was: R1,922.83.Current price is: R1,769.00.

-8%

Flash Harry Liquid Plastic in White is a high-flex, latex-modified acrylic waterproofing compound designed for long-lasting roof protection and surface coating. With 350% stretch capacity, UV stability, and superior adhesion, it delivers a flexible, non-flammable finish ideal for DIY and professional use. Compatible with tiled, slate, timber, and iron roofs, it seals flashings, parapet walls, and small flat roofs with reliable durability. Quick to apply and fast to cure, it ensures consistent waterproofing across a wide range of exterior surfaces.

Flash Harry Liquid Plastic | 20L, White Details:

  • Size: 20L
  • Colour: White
  • Type: Pure acrylic rubberized waterproofing and coating polymer
  • Flexibility: Latex-modified for 350% stretch
  • UV Stability: Resists degradation from sun exposure
  • Adhesion: Bonds effectively to multiple surfaces
  • Safety: Non-flammable formulation
  • Viscosity: 120–130 Krebs Units at 25°C
  • Application Areas: Pitched and flat roofs, flashings, lap joints, ridges, valleys, skylights, chimneys, roof screws, parapet walls
  • Surface Compatibility: Tiled, slate, iron, and timber roofs
  • Coverage (Waterproofing): 2.0–2.5L/m²
  • Coverage (Coating): 3m²/litre per coat
  • Finish: Flexible, rubberized coating
  • Application Tools: Brush, roller, or airless spray
  • Drying Time: 30 minutes between coats; rain-resistant in 6–8 hours; full cure in 24–48 hours
  • Limitations: Not suitable for submerged areas, lightweight screeds, or over bitumen systems

What’s In The Box?

1 x Flash Harry Liquid Plastic | 20L, White

6 in stock

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Flash-Harry-Liquid-Plastic-20L-White_FHLP5-25
Flash Harry Liquid Plastic | 20L, White
R1,922.83 Original price was: R1,922.83.R1,769.00Current price is: R1,769.00.

Flash Harry Liquid Plastic Overview

Flash Harry Liquid Plastic in White is a versatile waterproofing solution formulated for roofs and exterior surfaces. Its latex-enhanced acrylic base provides exceptional stretch, adhesion, and UV resistance, making it ideal for both residential and commercial applications.

Flash Harry Liquid Plastic Benefits and Features

  • Extreme Flexibility: 350% stretch capacity for dynamic surfaces
  • UV Resistant: Maintains integrity under prolonged sun exposure
  • Multi-Surface Adhesion: Bonds to tiled, slate, iron, and timber roofs
  • Non-Flammable: Safe for residential environments
  • Fast Drying: Rain-resistant within hours
  • DIY Friendly: Easy application with brush, roller, or spray
  • Protective Finish: Seals joints, ridges, and parapet walls
  • Versatile Coverage: Suitable for waterproofing and coating applications

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Steps to Follow for Applying Flash Harry Liquid Plastic

Preparation:

  1. Clean all surfaces thoroughly—remove dirt, grease, algae, and contaminants.
  2. For galvanized iron: Treat with acid degreasing primer or Frogskin Galvanised Iron Cleaner.
  3. For rusted surfaces: Brush down and apply rust converter.
  4. With porous surfaces: Prime with Plaster Pal bonding liquid or a 50% diluted coat of Liquid Plastic.

How to Apply Flash Harry Liquid Plastic:

  1. For waterproofing: Saturate membrane with compound before application.
  2. For coating: Apply a minimum of two coats with brush, roller, or spray.
  3. Alternate coats at right angles for optimal coverage.
  4. Maintain ambient temperature between 5°C and 35°C during application.
  5. Allow 30 minutes drying time between coats; final coat cures in 24–48 hours.

Cleanup:

  • Clean tools with water before the product dries
  • Dispose of waste responsibly
  • Seal unused product in original container
  • Wash hands and skin with soap and water

A Few Scenarios Where the Product Can Be Used:

  • Waterproofing small flat roofs under 20m²
  • Sealing around skylights and chimneys
  • Coating parapet walls and flashings
  • Protecting lap joints and roof screws
  • Reinforcing ridges and valleys on pitched roofs

Other Products You May Need for Your Roof Protection Project:

Health and Safety

Use in a well-ventilated area and wear protective gloves and eyewear during application. Avoid contact with skin and eyes. Do not apply near open flames or heat sources. Ensure surfaces are dry and clean before use. Not suitable for submerged areas or large gaps exceeding 5mm. Follow all safety instructions on the packaging for optimal results.

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Additional information

Weight27 kg
Dimensions31 × 31 × 28 cm

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