Durable Joint Sealing for Concrete, Cladding, and Façade Systems
Protects your structure from water ingress, movement cracks, and long-term deterioration.
Where systems meet, we seal the gaps
At MPM Waterproofing, our joint sealing work protects the weakest points in your structure: the expansion and control joints between concrete panels, cladding junctions, window frames, and façade systems.
We apply flexible, UV-stable sealants designed to absorb movement, repel moisture, and maintain long-term performance across a range of substrates and environments. Our work is widely used in new builds, re-clads, and remedial projects throughout Auckland and Northland, using Sika and Ardex approved sealant systems.
We ensure joints are correctly cleaned, primed, and backer-rodded prior to sealant application, and we match the right products to suit the substrate, expected movement, and exposure conditions.
Applications
Concrete expansion joints
Flexible joint sealants applied to concrete panels to allow for thermal and structural movement.
Roof and deck joints
Seals between membrane sections or across concrete decks where movement needs to be absorbed.
Precast panel joints
Seals between tilt-slab or precast concrete units to prevent moisture ingress and maintain visual uniformity.
Remedial joint repairs
Re-sealing of cracked, failed, or non-compliant joints as part of a remedial project.
Facade and cladding systems
Used around windows, cladding junctions, and flashings for weathertight, clean-edge finishes.
New builds and commercial fit-outs
Applied as part of new developments to meet consent and durability requirements.
Our Process
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We assess the joint type, substrate condition, exposure environment, and expected movement at your Auckland site to determine the correct sealant system and preparation requirements before work begins.
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We select suitable sealants and backer rod profiles based on substrate, joint width, movement rating, and UV exposure. A detailed quote and scope of work will be provided before any work begins.
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Joints are mechanically cleaned, primed, and backer rod is installed to ensure correct sealant depth, adhesion width, and movement performance in line with manufacturer requirements.
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Our applicators apply sealants in accordance with manufacturer specifications, tooling each joint to a clean, uniform finish suited to the substrate and exposure conditions.
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Completed joints are inspected under MPM's QA process. We provide photographic records, checklists, and PS3 documentation where required on completion.
Where joint sealing is used
Joint sealing plays an important role in maintaining the performance of the building envelope. Wherever two building elements meet, a flexible sealant system is required to allow movement while preventing water and moisture ingress.
Typical applications include:
Structural movement joints in concrete slabs and structural frames
Podium decks, roof terraces and exterior walkways
Cladding and façade panel joints
Window and door perimeter sealing
Mechanical and plumbing service penetrations
Parking structures and commercial floor slabs
Correctly installed sealant systems allow buildings to accommodate natural movement caused by temperature changes, settlement and structural loading while maintaining long-term weather protection.
NZBC-Compliant Systems
All installs meet or exceed New Zealand Building Code.
Full System Warranties
Backed by manufacturers and our own QA process.
Licensed & Certified
Fully trained installers using approved systems.
30+ Years of Experience
Hands-on waterproofing expertise across all sectors.
Clear, Reliable Communication
We turn up when we say we will and keep you informed.
Trusted by Top Builders
We work with leading contractors and developers.
Let’s Talk Waterproofing
Whether you’re planning a new project, looking for technical advice, or need support on a current job, the MPM Waterproofing team is here to help. Reach out to book a site visit, request a quote, or speak with one of our team members.
Other Waterproofing Services We Offer
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MPM Waterproofing protects foundations, basements, lift pits, and other below-grade structures across Auckland and Northland with high-performance tanking systems. Our installations block groundwater pressure, prevent moisture ingress, and safeguard concrete for long-term structural durability.
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MPM installs premium sheet and liquid roofing membranes designed to withstand New Zealand’s harsh climate. Our roofs provide reliable leak protection, strong UV resistance, and long service life with minimal ongoing maintenance.
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Our membrane decking solutions create dry, durable living spaces for balconies, terraces, and walkways. MPM combines precise installation with visually clean finishes to ensure every surface remains watertight and built for daily use.
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MPM Waterproofing specialises in podium-level systems that support landscaping, paving, and recreational areas. Our solutions offer strong waterproofing performance, efficient drainage, and long-term protection for complex outdoor spaces.
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MPM designs and installs green roof membranes that promote healthier buildings and sustainable environments. Our systems manage drainage, protect against root intrusion, and maintain waterproof integrity beneath soil, planting, and irrigation layers.
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A warm roof system keeps all insulation above the substrate, creating a continuous thermal barrier. MPM installs warm roof assemblies that prevent condensation, improve energy performance, and extend the lifespan of the roofing structure.
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Our liquid-applied membranes create seamless, flexible waterproofing that adapts to complex shapes and details. MPM uses advanced products for roofs, decks, planters, and remedial work where a continuous protective coating is essential.
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MPM Waterproofing ensures bathrooms, laundries, and kitchens are fully sealed before tiling or finishing. Our wet-area systems prevent leaks, protect substrates from moisture damage, and support long-lasting, compliant interior builds.
Approved Products, Suppliers & Industry Affiliations
