Repair guide / Before You Repair
How to Identify Asphalt Versus Concrete
Asphalt and concrete use different binders and repair systems. Color alone is unreliable, especially on sealed, dirty, weathered, or previously repaired surfaces.
Product instructions take precedence.
Read and follow the current label, instructions, technical data sheet, and safety data sheet for the exact selected product.
What to do
- Look for construction joints or regularly spaced control joints; these are common in concrete slabs.
- Look at a clean broken edge. Asphalt commonly shows dark binder around aggregate, while concrete commonly shows aggregate held in a cement paste.
- Check whether the surface is flexible pavement with seams and patches or a rigid slab system.
- Treat coatings, sealers, and prior patches as possible sources of confusion.
- If identification remains uncertain, ask a pavement professional before buying material.
Practical notes
Do not chip or excavate merely to identify the surface.
The exact repair product must explicitly name the surface and repair type it supports.
Common mistakes
- Choosing by color alone
- Applying an asphalt product to concrete without product approval
- Assuming a dark coating means the underlying slab is asphalt
Limits and professional help
This guide cannot confirm a material from a text description.
Current instructions for the exact selected product take precedence.
Related guides
Where Patcher fits
Patcher connects photo assessment, product-specific quantity planning, Gem Patch purchasing, and Dashboard. The iPhone app adds camera-based measurement; this guide remains a general educational reference.
See how Patcher worksSources
Product instructions can change. Confirm the current package, technical data sheet, and safety data for the material you use.
To report a correction, email support@patcher.me.