Joint waterproofing remediation in Sydney – sealing external wall joints to prevent water ingress

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Sealant Replacement & Joint Remediation
Removal and replacement of failed, cracked, or deteriorated sealant in façades, windows, expansion joints, and other critical interfaces to restore weatherproofing and movement capability.

Sealants are a building’s first line of defence against water ingress, air leakage, and energy loss. Over time, exposure to UV, thermal cycling, movement, and environmental pollutants causes them to harden, crack, or separate from adjoining surfaces. When this happens, water penetrates the joint, leading to hidden leaks, corrosion, mould growth, and costly structural repairs.

At Atomic Projects, we specialise in complete sealant and joint remediation, restoring the integrity of your building envelope while ensuring the joint can accommodate ongoing structural movement.

Our Sealant Replacement Process

  1. Inspection & Scope Development
    • Identify all joints with adhesion failure, cohesive cracking, or debonding.
    • Assess joint design, width, depth, and movement capability requirements.
  2. Old Sealant Removal
    • Carefully cut and remove deteriorated sealant without damaging adjoining substrates.
    • Grind or clean surfaces to expose sound, contaminant-free edges for new adhesion.
  3. Joint Preparation
    • Install correct backer rod or bond breaker tape to control sealant depth and shape.
    • Prime surfaces where required by manufacturer specifications.
  4. Application of New Sealant
    • Use high-performance polyurethane, hybrid, or silicone sealants selected for UV resistance, movement capability, and service life.
    • Apply under controlled temperature and humidity conditions to ensure optimal curing.
  5. Tooling & Finishing
    • Tool sealant for smooth, even finish ensuring full contact with joint edges.
    • Remove masking and clean surrounding surfaces for a professional result.
  6. Final QA & Documentation
    • Test adhesion and elasticity.
    • Provide photographic and written records for compliance and warranty purposes.

Common Joint Remediation Scenarios

  • Expansion joint sealant failure on façades.
  • Perimeter seals around glazing systems leaking.
  • Wet area joint breakdown in bathrooms, balconies, and podiums.
  • Acoustic and fire-rated sealant replacement.

Why Atomic Projects for Sealant & Joint Works

  • Specialist Rope Access & Swing Stage Teams: We access difficult, high-risk areas without major disruption.
  • Manufacturer-Approved Applicators: Our works meet or exceed warranty conditions.
  • Longevity Focused: Correct sealant selection ensures service life of 10–20+ years in Australian conditions.
  • Airtight & Watertight: Our remediation restores both waterproofing and thermal efficiency.

A failed seal is a silent hazard — the damage happens behind the surface, often for years before it becomes visible. By the time you see it, the problem has already spread. Proactive sealant replacement prevents this hidden damage and extends the lifespan of the building envelope.

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If you’re ready to get started, we're ready to help.

Take the next step and let’s build something that lasts.

 

📞 Call Us: 0410 515 509

✉️ Email Us: hello@atomicprojects.com.au

 

— Ben Tran, General Manager, Atomic Projects

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