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Discover surface-specific solutions built for lasting durability.
Molexicore™ is a proprietary surface protection technology engineered in Australia by JUST SEAL IT®, specialists in natural stone, tile and concrete. It is the technology platform behind every Just Seal It sealer. Every formula is built on the Molexicore™ base and tuned for its surface.
Molexicore™ protects natural materials from within, keeping their integrity, colour and texture intact instead of covering them in a plastic coating. It makes them more durable and longer lasting, without changing what makes them beautiful.
Natural stone, concrete, tile and timber are some of the most beautiful materials in any home or landscape. They are also porous. Outdoors and in high traffic areas, they are under constant attack from the elements.
Almost all of this starts with one thing: water getting into the material. Control the water, and you control the damage.
Molexicore™ is a water based, highly hydrophobic technology designed to work inside a surface rather than on top of it.
Its active molecules are small enough to travel deep into the capillary and pore network of hard surfaces. Once there, they bond within the material itself, forming a water repellent barrier from the inside out. The water and salts that cause damage are dramatically reduced, while the material can still breathe. Nothing is designed to sit on the surface, so the material keeps its natural look and feel.
The bond continues to develop as the treatment cures, reaching full performance over approximately 30 days.
Protecting beautiful materials shouldn’t come at a cost to the people and places around them.
Our stone and concrete formulas, Just Seal It PLUS and Classic, were independently tested on sandstone, one of the most porous and vulnerable natural stones, by Stone Initiatives and Materials Testing Group, a specialist stone testing laboratory in South Australia.
Resistance to salt attack. Tested under Australian Standard AS/NZS 4456.10 (Method A): 15 cycles of soaking in sodium sulphate solution followed by oven drying.
Water absorption. Under full immersion, compared with unsealed stone:
In our own testing, when we broke open a treated sandstone paver, the protection had reached 11mm into the stone. Depth varies with the porosity of each material.
Actual laboratory results achieved on sandstone, a highly porous stone. Results vary with the material.
For more than 15 years, our team at Prestige Surfaces has treated natural stone, concrete and engineered surfaces across thousands of residential, commercial and architectural projects, including work featured on The Block.
Because we are the specialists called back to clean, maintain and restore these surfaces, we see how they perform years later. Surfaces protected with our technology typically hold together well, with few signs of salt damage, efflorescence or deterioration.
Molexicore™ was developed and refined through that experience and tested across stone types, porosities and finishes. Today it is available through Just Seal It, with more than 15,000 surfaces protected.
Molexicore™ is the technology. Each Just Seal It formula is built on the Molexicore™ base and engineered for a specific level of protection and type of surface.
“Penetrating sealer” is a broad label with no defined standard for depth, durability or chemistry. Two products sold under it can differ completely in formulation and performance, and the name alone won’t tell you which one you are buying.
Molexicore™ takes a different approach. It is engineered to measurable performance, independently tested to Australian Standards and proven across thousands of real installations.
Molexicore™ is a proprietary, water based, highly hydrophobic surface protection technology. It bonds within the pore structure of hard surfaces to protect them from the inside out, preserving the material’s natural integrity rather than forming a coating on top. It is developed in Australia by Just Seal It and is the technology behind all Just Seal It sealers.
Every product is built on the Molexicore™ base, then tuned for a different level of protection or type of surface. PLUS, Classic and Wood Sealer are each engineered for their own job.
Yes. Our stone and concrete formulas, Just Seal It PLUS and Classic, were tested on sandstone by Stone Initiatives and Materials Testing Group in South Australia. Under Australian Standard AS/NZS 4456.10 for resistance to salt attack, unsealed stone lost 6.7% of its mass. Stone treated with Classic lost 1.4% (approximately 80% less mass loss) and with PLUS just 0.1% (approximately 98% less mass loss). Both formulas reduced water uptake by approximately 90% in the first hour of full immersion. Results vary with the material. Separately, the Molexicore™ base used in PLUS and Classic was tested by Envirolab, a NATA accredited laboratory, with no PFAS detected.
They are porous. Water soaks in and carries minerals and salts with it. Repeated wetting and drying, salt crystallisation, efflorescence, temperature change and freeze thaw cycles gradually break the material down, leading to staining, fretting and cracking. Keeping water out is one of the most effective ways to help prevent this.
Its active molecules travel into the capillaries and pores of the material and bond within it, creating a water repellent barrier inside the surface. The water and salts that cause damage are dramatically reduced, while the material stays breathable and is designed to look unchanged.
No. Molexicore™ is designed to leave no film, sheen or plastic layer. Because it works within the material, it will not peel, flake or wear off like a surface coating, and the material keeps its natural look and feel.
Just Seal It PLUS and Classic are PFAS free, solvent free, water based and low VOC. The Molexicore™ base they are built on was independently tested by Envirolab, a NATA accredited laboratory, with no PFAS detected across an extended panel of 28 compounds, and no benzene, toluene, xylene or chlorinated solvents.
“Penetrating sealer” is a general, unregulated industry label applied to many different products. Molexicore™ is a specific proprietary technology, engineered and independently tested, and available only in Just Seal It products.
Natural stone (including sandstone, limestone, travertine, granite, bluestone, marble, slate and quartzite), concrete, pavers, tiles, porcelain, grout, terracotta, brick and render. Timber and decking are treated with Just Seal It Wood Sealer, available in Australia and coming soon to the US.
Just Seal It PLUS and Classic are water based, PFAS free and solvent free. The exact composition of each formula is proprietary and is not published.
Molexicore™ is developed in Australia by Just Seal It, backed by more than 15 years of field experience from Prestige Surfaces. It is shipped worldwide.
No. Molexicore™ is available exclusively in Just Seal It products.
Longevity depends on the material, exposure and traffic levels. Because Molexicore™ bonds within the material rather than sitting on top, it does not wear away like a coating. A maintenance application every 3 to 5 years keeps performance at its peak.
Natural stone took millions of years to form. Concrete, timber and tile are chosen for their texture, colour and character. These materials deserve to be defended, not disguised.
Coating them in plastic hides the very thing that made them worth choosing. Molexicore™ does the opposite. It works with the material, not over it, keeping its integrity intact while making it more durable and longer lasting.
Protect what makes it beautiful. Keep it natural.
Molexicore™ is a trademark of Just Seal It Pty Ltd.
