Sydney Based + National Delivery
Sydney Based + National Delivery
Silonexx is moisture-activated and chemically bonds permanently into the masonry substrate.
The treated masonry becomes inherently water repellent at the molecular level.
Silonexx is a professional-grade DPC injection fluid for rising damp treatment in brick, stone and masonry construction.
The low-viscosity formulation penetrates the capillary pore network under injection pressure and chemically bonds to the mineral substrate through a moisture-activated reaction.
Silonexx bonds with the silica in the brick and permanently changes its physical composition. Treated masonry becomes inherently water repellent at the molecular level.
Rising damp injection is a year-round service that fits alongside existing waterproofing and remedial work. The technical barrier to entry is lower than most contractors expect, and jobs are typically completed in a single visit.
Silonexx is supplied with a full installation specification. Drill pattern, hole spacing, depth and product volume per wall type are all documented. Follow the spec and the treatment is warrantable.
When warranty is on the table, the installation specification matters as much as the product. Silonexx is built around the Capillary Saturation Zone™ — a defined treatment condition requiring full saturation across the wall width at injection depth.
That specification gives contractors something to stand behind. The treatment is either correctly installed to the “CSZ” standard or it isn’t. There’s no grey area when a client or engineer asks questions.
Australian brick construction varies significantly, particularly in pre-1960s buildings where lime mortar, dense clay brick, rubble fill and salt-affected masonry are common on the same job. Rising damp treatment in these walls requires a fluid that can move through irregular pore geometry under real injection pressures.
Silonexx is formulated and field-tested on Australian substrate conditions. The low viscosity allows the fluid to reach wall junctions, thick sections and areas of variable absorption that slower-moving systems won’t fully penetrate. During injection, product movement through the wall is visible at adjacent holes confirming coverage before you leave site.
Salt damp – rising damp carrying dissolved ground salts into the wall requires the same injection approach but more careful wall assessment beforehand. Salt crystallisation within the pore structure compromises absorption in affected zones. Silonexx handles active salt-affected masonry but the installation spec needs to account for it.
Rising damp moves through masonry via capillary action, moisture drawn upward through the interconnected pore network in brick and mortar. Chemical DPC injection interrupts that process by introducing a reactive silane fluid into the wall at the mortar joint level.
Under injection pressure the fluid distributes through the capillary network across the full wall width. Wall moisture activates the chemistry inside the substrate, where it chemically bonds to the mineral structure and renders the treated zone permanently water repellent. The capillary pathway that was carrying moisture upward no longer functions, the treated masonry repels water at the pore level rather than absorbing it.
The result is a continuous hydrophobic zone at the injection depth, functioning as a chemical damp proof course.
Salt damp and rising damp are both capillary moisture problems in masonry, but salt damp carries an additional complication. As moisture moves through the wall it picks up soluble salts from the ground. When that moisture evaporates inside the wall, those salts crystallise within the pore structure. Over time that crystallisation causes plaster failure, spalling and progressive masonry damage.
Treating salt damp requires the same DPC injection approach as rising damp. The difference is in the wall assessment beforehand. Salt-affected masonry often has compromised pore structure in the zones where crystallisation is heaviest, and that affects how the fluid distributes during injection. Identifying those zones before drilling changes how the installation spec is written.
Fluid injection under pressure is the reliable choice for both conditions in professional remedial work. Deep penetration, fast distribution and visual confirmation of coverage at adjacent holes during injection. For contractors carrying warranty responsibility on a rising damp treatment, being able to confirm product movement through the wall before you leave site is worth a lot.
Both our fluid and cream systems use the same silane chemistry. The difference is how the product gets into the wall.
Fluid injection uses pressure to drive the product through the pore network quickly and deeply. For professional rising damp treatment on complex or thick walls, that speed and depth of penetration gives you reliable coverage and visible confirmation of product movement during the injection process.
Cream systems rely on passive absorption. The product sits in the hole and slowly migrates into the surrounding masonry over time. For less critical walls or smaller DIY applications, cream is a practical and cost-effective choice. It’s a slower process but works well where wall geometry is simple and uniform.
Form: Ready-to-use injection fluid
Application: Chemical damp proof course for rising damp in masonry
Suitable substrates: Brick, block, stone — subject to wall assessment
Delivery method: Pressure injection into drilled mortar joints or masonry
Activation: Moisture-activated silane chemistry
Bond type: Permanent covalent integration into mineral substrate
Vapour permeability: Maintained post-treatment
Installation basis: Capillary Saturation Zone™ specification
Key requirement: Correct drill spacing, depth and product volume per wall type
Is DPC injection a permanent rising damp treatment?
Correctly installed chemical DPC injection is long-lasting — typically measured in decades. Performance depends on continuous barrier formation through the full wall width, correct drill spacing and sufficient product volume. Walls with significant internal voids or ongoing structural movement may need reassessment over time.
Do I need fluid or cream for my rising damp treatment?
For uniform single-skin brick in good condition, cream is a practical option. For thick walls, rubble fill, irregular absorption or salt-affected masonry, fluid injection under pressure gives more reliable and verifiable coverage.
Can you inject sandstone or rubble-filled walls?
Sometimes. Both are higher-risk substrates and require method adjustments. Contact us before specifying for these wall types.
What causes rising damp treatment to fail?
Discontinuous barrier formation is the main cause. Usually the result of incorrect drill spacing, insufficient product volume, undetected internal voids or active salt load compromising absorption in affected zones.
Do you supply to homeowners?
Silonexx is supplied to licensed trades. Correct diagnosis, drill pattern and product volume require field experience to get right consistently.
How do I buy Silonexx?
Through the buy page or contact us directly for trade supply and distribution enquiries.