How to Kill Weeds in Driveway Cracks

How to Kill Weeds in Driveway Cracks: Permanent Solution

Weeds in driveway cracks are more than unsightly—they're actively destroying your concrete. This guide covers three methods, from quick kill to permanent prevention.

Method 1: Boiling Water (Instant Kill)

Boiling water kills weeds instantly:

• Pour directly into crack
• Kills on contact
• No chemicals
• Repeat daily for 3-5 days until dead

This kills existing weeds but doesn't prevent regrowth.

Method 2: Vinegar + Salt + Soap (Prevents Regrowth)

This natural solution prevents regrowth:

• Mix: 1 gallon vinegar, 1 cup salt, 1 tablespoon dish soap
• Apply to cracks
• Let sit 24-48 hours
• Removes dead weeds and prevents new growth

This kills and prevents regrowth for months.

Method 3: Seal the Crack (Permanent Solution)

Sealing with Sikaflex (or similar polyurethane sealant) stops weeds forever:

1. Kill existing weeds (use method 1 or 2)
2. Clean crack thoroughly
3. Insert backer rod if crack is wide
4. Fill with self-leveling polyurethane sealant

Sealed cracks prevent weeds from taking root permanently.

The Bottom Line

Boiling water kills instantly. Vinegar+Salt+Soap prevents regrowth. Sealing with Sikaflex stops them forever. For permanent results, always seal the crack after killing weeds.

Need help with weed removal and crack sealing? Contact Local Concrete Contractor. We provide permanent solutions that eliminate weeds and protect your driveway.