A high-performance hot melt crack sealant developed for the long-term sealing and repair of joints and cracks in asphalt and concrete pavements. Engineered to handle extreme conditions, this sealant offers excellent adhesion, high elasticity, and strong temperature resistance from -30°C to 60°C. It is ideal for use on roads, bridges, airport runways, and concrete joints where flexibility and longevity are critical.

Available Packaging:     12.5kg Boxes
Pallet Configuration:     80 Boxes per Pallet
Shelf Life (Unopened): 12 Months

Applications

• Sealing cracks in asphalt pavements
• Pre-treatment of old asphalt prior to overlay
• Treatment of sub-base cracks on concrete roads
• Sealing bridge joints and airport runways
• Joints in reservoir embankments and cement structures

Technical Specifications

***Standards detail included at base of document

Key Features & Benefits

• High Flexibility: Excellent elasticity to handle wide crack movement.
• Superior Adhesion: Bonds effectively to both asphalt and concrete.
• Temperature Resilience: Withstands -30°C cold without brittleness and up to 60°C without flow or wheel-stick.
• Fast Traffic Recovery: Dries within 15–30 minutes, minimising downtime.
• User-Friendly Application: Low viscosity when heated ensures dense pouring and consistent flow.
• Cost-Effective: Delivers high performance at a competitive price point.

Construction Guidelines

1. Preparation: Mark area and position machinery (slotting and filling machines). Preheat the filling machine to 170–200°C.
2. Grooving: Cut grooves to 13–26mm width/depth using suitable saw blade.
3. Cleaning: Remove all dust and debris using manual tools and air compressor/blower.
4. Filling: Fill cracks while the sealant is between 170–200°C. Preheat groove in cold conditions.
5. Curing: Allow 15–30 minutes before reopening to traffic.

For more information or to place an order, contact our team at sales@nzbrush.co.nz or 0800 692 787

Testing Standards

ASTM D5329-2007

Standard Test Methods for Sealants and Fillers, Hot-Applied, for Joints and Cracks in Asphalt Pavements and Portland Cement Concrete Pavements

What it Tests:

• Asphalt compatibility, Flow resistance, Adhesion, Resilience and penetration, Flexibility at low temperatures

Why It Matters in NZ:

• This is a North American standard widely used internationally.
• NZTA (New Zealand Transport Agency) often references ASTM standards when there isn’t a direct NZ-specific alternative.
• It ensures the sealant won't chemically react with New Zealand road-grade asphalt, which varies slightly by region and aggregate type.
• Crucial for roads in high UV, high rain, and freeze-thaw environments (think Central Otago winters vs. Northland summers).

ASTM D6690

Standard Specification for Joint and Crack Sealants, Hot-Applied, for Concrete and Asphalt Pavements

What it Covers:

• Product classification into different types based on elasticity, flow, and thermal resistance. Minimum performance thresholds and Installation temperature ranges

Relevance to NZ:

• Ensures your sealant has the stretch and recovery performance needed for NZ’s common thermal movement cracks, especially in widened road sections or after a harsh winter.

JT/T740-2009

Chinese Standard – Pavement Rubber Asphalt Grouting Glue

What it Covers:

• Penetration (softness), Elastic recovery, Flow at high temperatures, Adhesion in tensile tests

Relevance to NZ:

• This standard is specific to China, where climates range from Siberian cold to tropical — so it's a broad-spectrum durability test.
• Useful for understanding how the sealant performs under extreme temperature swings, which are very relevant in NZ areas like the Mackenzie Basin or the Central Plateau.

Additional Notes for NZTA & Contractors:

• NZTA M/1 Asphaltic Mixes: This sealant is compatible with mixes commonly specified under NZTA M/1.
• Typical Use Cases: Ideal for road widening joints, post-winter maintenance, subbase cracking, and bridge deck transitions.

Construction Advantage: Dense flow during application and fast set times help keep operations efficient, even in variable weather conditions.