Flash Harry Liquid Plastic is a latex-modified acrylic waterproofing solution designed for both DIY and professional use. Engineered for flexibility and adhesion, it provides a durable coating across a wide variety of roofing and structural surfaces.

Flash Harry Liquid Plastic Benefits and Features

• Latex Modification: Enhances stretch and surface bonding
• UV Resistant: Withstands prolonged sun exposure without degradation
• Multi-Surface Use: Compatible with iron, slate, timber, and tiled roofs
• 350% Stretch Capacity: Adapts to movement and surface shifts
• Rain-Resistant Cure: Final coat withstands rain within 6–8 hours
• Fast Drying: Minimum 30-minute interval between coats
• Application Versatility: Brush, roller, or airless spray compatible
• Non-Flammable: Safe for use in sensitive environments
• Coverage Efficiency: Up to 3m² per liter per coat
• Surface Priming Options: Tailored primers for galvanized, rusted, and porous surfaces

Steps to Follow for Applying Flash Harry Liquid Plastic

Preparation:

1. Clean and dry the surface thoroughly
2. Prime according to surface type:
   • Galvanized iron: Use acid degreasing primer or Frogskin Cleaner
   • Rusted surfaces: Brush down and apply rust converter
   • Porous surfaces: Use Plaster Pal or diluted Liquid Plastic
3. Ensure ambient temperature is between 5°C and 35°C

How to Apply Flash Harry Liquid Plastic:

1. For waterproofing, pre-soak membrane in compound for full saturation
2. Apply first coat thoroughly over membrane
3. For coating, apply two coats minimum using brush, roller, or spray
4. Alternate coat directions at right angles for full coverage
5. Allow 30 minutes between coats; final coat cures in 24–48 hours

Cleanup:

• Clean tools immediately with water
• Remove any spills from surfaces before drying
• Store unused product in a sealed container
• Dispose of empty containers according to local regulations

A Few Scenarios Where the Product Can Be Used:

• Sealing parapet walls and cappings
• Waterproofing around chimneys and skylights
• Coating small flat roofs under 20m²
• Reinforcing ridges, valleys, and roof screws

Other Products You May Need for Your Waterproofing Project

Health and Safety

Always apply Flash Harry Liquid Plastic in well-ventilated areas and avoid contact with skin and eyes. Do not use on surfaces below 5°C or above 35°C. Avoid waterproofing over large gaps exceeding 5mm. This product is not suitable for submerged areas or under-tile applications. Use appropriate primers for surface preparation and follow drying guidelines to ensure optimal performance. Protective gloves and eyewear are recommended during application.

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