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Roofers Flash 'N' Patch: A Technical Overview
Roofers Flash 'N' Patch is a premium hybrid acrylic sealant formulated as a thick, brush-grade flashing compound. Designed for demanding external environments, it delivers long-lasting elasticity, UV stability, and superior adhesion to roofing substrates. This flexible sealant bridges gaps and cracks caused by movement, weather exposure, and substrate ageing, while remaining paintable and non-staining. With excellent handling characteristics and broad temperature tolerance, it is ideal for maintenance, emergency patching, and permanent waterproofing on most Australian roof types.
Core Features & Specifications
- Hybrid acrylic formulation with advanced movement capability (±25%)
- Strong adhesion to Colorbond®, brick, timber, PVC, aluminium, and more
- High UV resistance for exposed outdoor conditions
- Remains flexible from 5°C to 90°C — perfect for hot roofs and cold nights
- Paintable after 24 hours — blends easily with exterior finishes
- Non-toxic, non-hazardous, and low-VOC (32g/L)
- Water clean-up for uncured product
The Roofers Flash 'N' Patch Advantage
- Handles joint expansion and contraction without cracking
- Safe to use around residential and sensitive building environments
- Can be applied with a brush — no caulking gun or specialist tools required
- Performs reliably under both hot tin roofs and shaded gutter zones
- Ideal for trade professionals seeking a flexible, permanent fix
Best Practices: Do's & Don'ts
Do
- Apply with a short-bristled brush in a single direction
- Ensure the substrate is clean, dry, and grease-free before application
- Wait at least 24 hours before painting over the applied area
- Use in dry conditions where rain is not expected for 24 hours
Don't
- Do not apply on wet or damp surfaces
- Do not overwork the product — thick brush strokes are preferred
- Do not use as a structural joint filler
- Do not store open containers in hot or unventilated areas
Applications in Practice: Trade Scenarios
For Roofers (On-Site Installer): Gutter Seal & Patch
The Engineering Challenge
Leaks at gutter joins and around penetrations often occur due to metal expansion and UV damage. Fast fixes that remain flexible are essential.
The System-Based Solution with Roofers Flash 'N' Patch
Brush on a 2mm thick layer over the cleaned joint, feathering out onto surrounding surface. Allow to dry for 24 hours before exposing to moisture or paint.
Best Practice Note
For best performance, apply during the cooler part of the day to reduce skin-over time and ensure even film thickness.
For Builders (Remedial Specialist): Cracked Tile Sealing
The Engineering Challenge
Cracked concrete or terracotta tiles can allow water ingress during heavy storms, especially on ageing roofs or poorly sealed valleys.
The System-Based Solution with Roofers Flash 'N' Patch
Apply directly over cracked tiles after surface prep. Product bridges movement and prevents further damage while awaiting replacement or repainting.
Best Practice Note
Do not apply if rain is forecast within 24 hours. Always test on porous tiles for absorption prior to full application.
Performance Benchmark: Roofers Flash 'N' Patch vs. Standard Alternatives
| Metric | Roofers Flash 'N' Patch | Standard Acrylic Sealant | Advantage |
|---|---|---|---|
| Movement Capability | ±25% High Flexibility | ±10% | Withstands wider expansion and contraction |
| UV Resistance | UV Stable Long-Term Exposure Safe | Moderate | Better longevity in direct sunlight |
| Paintability | After 24 hrs Compatible | Variable | Simplifies finish blending |
| Toxicity | Non-Toxic Safe to Use | Contains Solvents | Better for health and environment |
Frequently Asked Questions
How thick should Roofers Flash 'N' Patch be applied?
Roofers Flash 'N' Patch should be applied at a thickness of 1.5mm to 2mm using a short-bristled brush. Apply in one direction to ensure an even, continuous film over the surface.
Can I paint over Roofers Flash 'N' Patch?
Yes, it is paintable after 24 hours. Ensure the surface is fully cured and dry before applying water-based or acrylic exterior paints. Always test for compatibility with specialty coatings.
Is Roofers Flash 'N' Patch safe to use around drinking water or food prep areas?
While non-toxic and non-hazardous, Roofers Flash 'N' Patch is not certified for use in potable water or food prep zones. Use a product approved for those specific applications if required.
What materials does Roofers Flash 'N' Patch adhere to?
It adheres strongly to Colorbond®, zincalume, aluminium, PVC, timber, brick, blockwork and other common roof substrates. Always ensure surface is clean and dry prior to application.
Can I apply Roofers Flash 'N' Patch if rain is forecast?
No. Roofers Flash 'N' Patch should not be applied if rain is expected within 24 hours. It must cure in dry conditions to ensure full adhesion and performance.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Roof penetration and flashing joint sealing | Flexible and waterproof seal that accommodates movement and prevents ingress | Roofers, Plumbers, Builders |
| Cracked tile or sheet metal patching | Rapid repair solution that resists UV and temperature stress | Handymen, Maintenance Crews |
| Sealing gutters, valleys, and stormwater junctions | Brush-grade application allows full coverage and feathered sealing | Gutter Installers, Roofing Contractors |
| General-purpose flashing repairs | Bonds to Colorbond®, aluminium, PVC, and timber without primer | Glaziers, Builders, Property Maintenance |
| Emergency waterproofing in remote or exposed locations | Can be applied by brush without tools or equipment; no caulking gun needed | Remote Contractors, Field Repairers |
Applying Roofers Flash 'N' Patch: Enhanced Protocols & Best Practices
-
1. Prepare the Substrate
Ensure the surface is completely dry, clean, and free of dust, grease, moss, or flaking materials. Surface moisture will affect bond strength.
Method A: Water Wash
Use a hose or pressure washer to remove dirt and loose debris. Allow to dry thoroughly before applying.
Method B: Solvent Wipe (for metals/plastics)
Use isopropyl alcohol or a mild solvent to remove oil or grease from metal and plastic substrates.
Timing: Surface must be dry for at least 2 hours prior to application.Pro Tip: Do not apply if rain is forecast within 24 hours. -
2. Apply Roofers Flash 'N' Patch
Apply using a short-bristled brush in a single direction. The ideal coat thickness is 1.5mm to 2mm to create a durable waterproof seal.
Method A: Standard Application
Brush generously across the joint or gap, feathering edges outward by 30–50mm for sealing coverage.
Method B: Layered Application
For deep joints or areas under movement stress, apply two coats at 90° angles, allowing the first to fully dry before re-coating.
Timing: Working time per coat: approx. 10–15 minutes at 20°C.Pro Tip: Avoid excessive brushing — this can cause streaking or air entrapment. -
3. Allow Full Cure
The product cures through evaporation of water. Protect the area from rain or moisture for at least 24 hours post-application.
Timing: Full dry time: 24–48 hours depending on coat thickness and weather.Pro Tip: Faster cure in warm, low-humidity conditions. Avoid application late in the day during winter. -
4. Optional Painting
If painting over the sealant, allow at least 24 hours for full skin formation and dry time. Use compatible acrylic or water-based paints.
Timing: Minimum 24 hours dry time before painting.Pro Tip: Always test a small area for paint compatibility before full application.
Limitations & Safety
Product Limitations
Not suitable for application on wet or damp surfaces — always allow full drying before use.
Do not use in permanently submerged conditions such as ponds, tanks, or water features.
Avoid applying if rain is expected within 24 hours — moisture will interfere with curing.
Not intended for structural or load-bearing joints.
Safety & Handling Requirements
Personal Protective Equipment
Wear gloves and safety glasses during application. Avoid prolonged contact with skin or eyes.
Ventilation
Use in a well-ventilated area. Although low in VOCs, ensure airflow when working indoors or in enclosed roof spaces.
Storage Precautions
Keep containers sealed when not in use. Store below 30°C out of direct sunlight and away from frost.
Emergency First Aid
Eyes:
Rinse thoroughly with clean water for 15 minutes. Seek medical attention if irritation persists.
Skin:
Wash affected area with soap and water. Remove any contaminated clothing.
Inhaled:
Move to fresh air. If symptoms develop, seek medical advice.
Swallowed:
Rinse mouth with water. Do not induce vomiting. Contact a doctor immediately.
Refer to the SDS for full health and safety guidelines.
Roofers Flash 'N' Patch Application Guide
Colorbond® & Zincalume®
Surface Preparation
Clean the surface with water and mild detergent to remove dust and oil. Rinse and dry thoroughly before application. Do not abrade pre-painted surfaces.
No primer typically required
Roofers Flash 'N' Patch bonds well to metal cladding with proper surface preparation.
Timber (Treated or Untreated)
Surface Preparation
Ensure timber is dry and free from dust, oils, or preservatives. Light sanding may help promote adhesion if the surface is glossy.
No primer typically required
Product performs well on most timber surfaces without primer.
PVC & Plastics
Surface Preparation
Wipe with isopropyl alcohol or mild solvent to remove plasticisers and oils. Ensure surface is dry before application. Test for compatibility on unknown grades.
Primer recommended for optimal adhesion
Use primer if surface is oily or adhesion is marginal. Always conduct adhesion test first.
Contact Adheseal Technical Support for suitable primerBrick & Blockwork
Surface Preparation
Remove dust, efflorescence, and loose mortar. Brush or air blast the surface and ensure it is fully dry before application.
No primer typically required
Excellent adhesion to dry masonry surfaces with clean edges.
Aluminium
Surface Preparation
Degrease with solvent, rinse, and dry. Light scuffing can help improve grip if the surface is very smooth or anodised.
Primer optional
Primer may enhance long-term performance under water exposure.
Adheseal Primer 600
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