Flash Harry Liquid Plastic Overview

Flash Harry Liquid Plastic is engineered for versatile waterproofing across a wide range of surfaces. Its latex-enhanced formulation ensures flexibility and adhesion, making it suitable for both pitched and flat roofs, as well as complex architectural features like skylights and chimneys.

Flash Harry Liquid Plastic Benefits and Features

• Extreme Flexibility: Latex-modified for 350% stretch
• UV Stable: Resists degradation from sun exposure
• Superior Adhesion: Bonds to multiple substrates
• Non-Flammable: Safe for residential and commercial use
• Multi-Surface Compatibility: Works on tiled, slate, iron, and timber roofs
• DIY Friendly: Easy to apply with brush, roller, or spray
• Fast Drying: Rain-resistant within hours
• Durable Finish: Long-lasting protection with full cure in 24–48 hours

Steps to Follow for Applying Flash Harry Liquid Plastic

Preparation:

1. Ensure surface is clean, dry, and free of debris
2. Prime surface based on material type:
   • Galvanized Iron: Use acid degreasing primer or Frogskin Cleaner
   • Rusted Surfaces: Brush down and apply rust converter
   • Porous Surfaces: Prime with Plaster Pal or 50% diluted Liquid Plastic

How to Apply The Flash Harry Liquid Plastic

• Waterproofing:
  1. Use with waterproofing membrane
  2. Saturate membrane thoroughly—pre-soaking is recommended
• Coating:
  1. Apply minimum two coats
  2. Alternate coat directions at right angles
  3. Allow 30 minutes drying time between coats

Cleanup:

• Clean tools immediately after use
• Store remaining product in a sealed container
• Dispose of packaging responsibly

A Few Scenarios Where the Product Can Be Used:

• Waterproofing flat roofs under 20m²
• Sealing around skylights, chimneys, and parapet walls
• Coating roof screws, lap joints, ridges, and valleys
• Protecting timber, iron, slate, and tiled pitched roofs

Limitations

• Not suitable for use under tiles or in areas with permanent water ponding
• Not recommended for lightweight screed applications
• Do not apply over existing bitumen systems
• Avoid waterproofing over gaps larger than 5mm

Other Products You May Need for Your Waterproofing Project

Health and Safety

Always wear protective gloves and eyewear during application. Ensure adequate ventilation when working indoors. Do not apply in extreme temperatures or on wet surfaces. Keep out of reach of children and store in a cool, dry place.

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