Patching Where Bitumen Meets Concrete
Kerbs, crossovers, gutters and slab edges
Where bitumen meets concrete — at kerbs, gutters, driveway crossovers and slab edges — the joint is where potholes and cracks start. Patch broken areas with Asphalt in a Bag, which bonds to both surfaces, and seal narrow gaps with Rubberised Crack Filler.
By the Permanent Pothole Solutions team · Updated 26 October 2026
Concrete and asphalt move differently with temperature, so the join opens up and lets water in.
Which product?
- Gaps up to 9mm: Rubberised Crack Filler
- Wider gaps: pack with sand or backer rod to within 6mm of the surface, then seal
- Broken or missing bitumen: 7 Gauge or 10 Gauge, compacted against the concrete
10 Gauge Mix
View product →Concrete & joins guideFixing Potholes in Concrete
Read the guide →Getting a good bond
Clean the surface of dust, loose material and old filler, then compact firmly so the mix is pressed against the concrete. The co-polymer in Asphalt in a Bag is what lets it adhere to concrete, steel and wood as well as asphalt.
Choosing the right gauge
| Mix | Compacted lift | Best for |
|---|---|---|
| 5 Gauge | 12.5–20mm | Shallow repairs and fine finishes (made to order) |
| 7 Gauge | 17.5–28mm | Driveways, footpaths, shallow potholes |
| 10 Gauge | 25–40mm | All-purpose pothole and road repairs |
| 14 Gauge | 35–56mm | Deeper potholes and heavy-duty repairs |
Coverage at a glance
- 15kg bag/bucket ≈ 0.13 m² at 50mm
- 20kg bag/bucket ≈ 0.17 m² at 50mm
- 1 tonne bulk bag ≈ 8.7 m² at 50mm
Need an exact number? Use the Asphalt Calculator.
Why Asphalt in a Bag
- Permanent. Expands and contracts with the road surface, so the patch moves with the pavement instead of breaking away.
- Cures on impact. Curing is activated by compaction — tamp it or roll it and it sets.
- Bonds to anything. Adheres to asphalt, concrete, steel and even wood.
- Any weather. Apply from -26°C to 49°C, in rain, or straight into a pothole full of water.
- No tack coat. No pre-coating or priming. Open, pour, compact.
- Traffic-ready. Application is up to five times faster, and it can take traffic immediately.
Related
Patching Where Bitumen Meets Concrete FAQs
Will the patch be black on concrete?
How do I seal the gap between bitumen and concrete?
Can Asphalt in a Bag be used on concrete?
Fix it once.
Fix it permanently.
Talk to our team about Asphalt in a Bag, Rubberised Crack Filler and bulk supply.