The Friendly Local Sealing Service You Can Trust
At A1 Silicone Seal Services, we offer more than just joint sealing—we offer peace of mind. Based in Sydney, our team specialises in silicone caulking and expansion joint sealing for residential, commercial, and civil projects. We’re known for our clean finishes, reliable workmanship, and friendly, no-fuss service that gets the job done right.
We believe that sealing isn’t just a final touch—it’s a critical layer of protection against moisture, movement, drafts, and long-term damage. Our team works closely with builders, developers, and homeowners alike to install and maintain expansion joint systems that stand the test of time.
Whether you need bathroom caulking or large-scale polyurethane sealing on a commercial façade, we apply every bead with precision, experience, and care. With flexible, appointment-based service and a passion for quality, we make sure your joints are sealed for performance, not just appearance.
Sealing Showers, Baths & Vanities
Bathrooms are one of the most moisture-prone areas in any home or building. We seal around your shower, tub, and vanity with high-performance silicone to prevent water leaks, mould growth, and tile damage. Our team ensures the finish is clean, professional, and built to last.
Kitchen Splashbacks, Sinks & Benchtops
In kitchens, sealing is essential to stop water, grease, and crumbs from slipping between benchtops, splashbacks, and cabinetry. We apply food-safe, mould-resistant sealants in seamless lines that match your surfaces and stand up to daily wear and tear.
Floor & Wall Junctions, Internal Corners & Verticals
Over time, movement between floors and walls can cause cracks or separation. Our expert caulking ensures these junctions are flexible and sealed tight, absorbing minor shifts while protecting against dust, pests, and water ingress.
Windows, Doors & Skirting Boards
We seal around internal and external door frames, windows, and skirting to prevent drafts, pest entry, and moisture buildup. Our work not only improves comfort but also helps maintain energy efficiency by keeping your space properly insulated.
Mirrors, Shower Screens & Glass Edges
We carefully seal mirrors and shower screens to prevent moisture build-up behind the glass, which can lead to corrosion and detachment. Our team uses clear or colour-matched sealants to ensure a sleek, invisible finish.
Powder Rooms, Laundries & Utility Spaces
Wet utility areas need just as much protection as bathrooms. We seal cabinetry, floors, walls, and plumbing junctions in these spaces to keep moisture out and surfaces clean. Our discreet, precise application enhances hygiene and durability.
Expansion Joint Sealing for Buildings
Expansion joints are vital for absorbing movement caused by temperature changes, settling, or vibration. We work alongside developers and builders to ensure the correct expansion joint system is selected and installed. This prevents cracking, structural stress, and water damage in buildings of any size.
Civil, External & Polyurethane Joint Sealing
For concrete panels, driveways, balconies, retaining walls, and blockwork, we use polyurethane and silicone systems suited to high-movement and outdoor environments. These heavy-duty sealants are UV-stable, weather-resistant, and long-lasting—ideal for external sealing and structural protection.
Fire-Rated Sealant & Passive Protection
Our team applies certified fire-rated sealants for areas such as electrical boxes, service penetrations, and passive fire systems. These slow the spread of fire and comply with Australian building regulations, giving you critical protection in high-risk zones.
FAQs – Silicone & Joint Sealing Services
Why is professional silicone sealing important?
DIY caulking often fails due to poor surface prep or incorrect application. We use professional-grade products and methods to ensure lasting results and clean finishes.
What’s the difference between caulking and joint sealing?
Silicone caulking is typically used for internal finishes and smaller joints, while polyurethane joint sealing is suited to larger gaps and structural expansion joints.
How long does your sealing work last?
Our sealant systems are designed to last 10–20 years, depending on usage and environmental exposure.
Can you help choose the right sealant system for my project?
Yes. We regularly advise builders and developers on the most suitable expansion joints and caulking systems to ensure long-term performance and compliance.
Do you service both small and large projects?
Absolutely. With a large, skilled team, we handle everything from residential bathrooms to large-scale construction sealing.
Why Choose A1 Silicone Seal Services?
The Friendly Local Sealing Experts
We’re Sydney-based and genuinely care about our work and our clients.
Services That Exceed Expectations
From small bathrooms to commercial buildings, we take every job seriously.
Experts in Expansion Joint Systems
We don’t just seal—we advise, guide, and ensure long-term structural integrity.
Flexible Scheduling
We work by appointment to fit your project timeline.
No Gaps, No Worries
Our motto says it all: we deliver airtight, watertight finishes that you can trust.
Clean, Professional Results
Every finish is neat, every bead is uniform, and every project is left spotless.
Let’s Get to Work!
Call A1 Silicone Seal Services Sydney today and find out why we’re trusted by builders, developers, and homeowners across the city.
Looking for expert silicone sealing in Sydney?
Call
0415 977 776 to get started.