Sale!

Flash Harry Liquid Plastic | 20L, Black

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

-8%

Flash Harry Liquid Plastic in Black is a pure acrylic, rubberized waterproofing compound designed for high-performance roof protection and surface coating. Engineered with latex modification, it offers extreme flexibility, superior adhesion, and UV stability—making it ideal for DIY waterproofing across various roof types. Its 350% stretch capacity ensures long-term durability, while its non-flammable nature adds an extra layer of safety. Whether sealing flashings or coating parapet walls, this product delivers reliable coverage and a resilient finish.

Flash Harry Liquid Plastic | 20L, Black Details:

  • Size: 20L
  • Colour: Black
  • Type: Pure acrylic rubberized waterproofing and coating polymer
  • Flexibility: Modified with latex for 350% stretch
  • UV Stability: Maintains integrity under sun exposure
  • Adhesion: Superior bonding to various substrates
  • 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, Black

6 in stock

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Flash Harry Liquid Plastic | 20L, Black
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 is a high-performance waterproofing and coating solution formulated for roofs and exterior surfaces. Its latex-enhanced acrylic base provides exceptional stretch, adhesion, and UV resistance, making it a trusted choice for both residential and commercial applications.

Flash Harry Liquid Plastic Benefits and Features

  • Latex Flexibility: Allows up to 350% stretch for dynamic surfaces
  • UV Stability: Resists degradation from sun exposure
  • Superior Adhesion: Bonds effectively to multiple roof types
  • Non-Flammable: Safe for use in residential environments
  • Quick Drying: Rain-resistant within hours
  • Multi-Surface Use: Compatible with tiled, slate, iron, and timber roofs
  • DIY Friendly: Easy to apply with brush, roller, or spray
  • Protective Finish: Seals joints, ridges, and parapet walls
  • Versatile Coverage: Suitable for both 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. For 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 according to local regulations
  • 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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