CLEARSEAL – NANO PENETRATING GRAVEL SEALER
Deep-Penetrating Protection for Gravel Roads and Bases
Clearseal is a nano-modified top sealer sprayed onto gravel surfaces, penetrating up to 60mm deep to strengthen the gravel matrix and render it hydrophobic — delivering durable, water-resistant performance beyond conventional surface seals.
THE CHALLENGE WITH GRAVEL SURFACES
Gravel roads and bases deteriorate rapidly due to:
- Water ingress during rainfall
- Loss of fines through erosion and traffic
- Surface softening and deformation
- Dust generation and frequent regrading
Conventional surface seals and bitumen sprays:
- Sit only on the surface
- Crack, peel, or wash away
- Do not strengthen the underlying gravel
- Require frequent reapplication
WHAT IS CLEARSEAL?
Clearseal is an advanced nano-modified penetrating top sealer specifically developed for gravel roads, gravel bases, and unbound layers.
Unlike traditional surface treatments, Clearseal:
• Penetrates deeply into the gravel layer (up to 60mm)
• Binds gravel particles internally
• Strengthens the gravel matrix
• Makes the treated layer hydrophobic
• Maintains natural surface appearance
The result is a stronger, more stable, and water-resistant gravel surface.
HOW CLEARSEAL TECHNOLOGY WORKS
– Deep Nano Penetration
– Nano-scale particles migrate into the voids between gravel and fine particles, achieving penetration depths of up to 60mm.
– Internal Particle Binding
– Polymer chains bind fines and aggregate together, improving interlock and load distribution.
– Hydrophobic Performance
– Clearseal chemically alters the treated layer to repel water, significantly reducing moisture absorption.
– Strength Enhancement
– Reduced moisture sensitivity improves stiffness, load-bearing capacity, and resistance to deformation.
APPLICATION PROCESS
• Shape and compact gravel surface
• Ensure surface is clean and dust-free
• Spray Clearseal evenly over the surface
• Allow penetration into the gravel layer
• Light curing period
• Open to traffic
No surface coating. No membrane. Penetration-based performance.
KEY PERFORMANCE BENEFITS
• Structural Improvement
• Strengthens gravel base and surface layers
• Improves load distribution
• Reduces rutting and corrugation
• Moisture Resistance
• Hydrophobic treatment repels water
• Prevents softening during rainfall
• Maintains performance in wet conditions
• Maintenance Reduction
• Reduced need for grading
• Lower dust generation
• Extended maintenance intervals
• Cost Efficiency
• Lower lifecycle cost than surface seals
• Reduced material loss
Faster and simpler application and minimal disruption
CLEARSEAL VS CONVENTIONAL SURFACE SEALS
Conventional Bitumen-Based Seals
– Surface-only application
– Prone to cracking and peeling
– Washed away by rain
– No internal strengthening
Clearseal Nano Technology
– Penetrates up to 60mm deep
– Strengthens gravel internally
– Long-lasting hydrophobic protection
– Durable performance under traffic and weather
IDEAL APPLICATIONS
• Gravel roads
• Rural and access roads
• Mining haul roads
• Construction site roads
• Gravel base layers prior to surfacing
Clearseal is effective as both a standalone gravel treatment and a preparatory layer before further surfacing.
ENGINEERING-LED APPLICATION
Clearseal applications are supported by:
- Site condition assessment
- Gravel grading evaluation
- Application rate design
- Technical guidance and supervision
- Ensuring consistent penetration, performance, and durability.
WHY CHOOSE CLEARSEAL BY KOBEL NANO
- Proven nano-modified technology
- Deep penetration, not surface coating
- Hydrophobic strengthening of gravel
- Reduced maintenance and lifecycle costs
- Designed for African conditions
Strengthen and Protect Gravel — From Within
Upgrade gravel performance without expensive surfacing.