Repair Systems — Rising Damp
Chemical DPC injection — siloxane liquid
Technical product reference for siloxane liquid chemical damp proof course injection for rising damp treatment in dense masonry — covering pressure injection method, brand comparisons, WTA system compatibility and product selection.
What are siloxane liquid DPC injection systems?
Siloxane liquid chemical DPC injection systems are low-viscosity fluid products injected under pressure into pre-drilled holes in masonry to create a hydrophobic damp-proof barrier against rising damp. The low viscosity of liquid siloxane products allows deeper penetration into dense or fine-pored masonry substrates compared to cream products, making them the preferred injection product where masonry porosity is lower than standard brickwork.
The key distinction from silane cream DPC is the product consistency and application method. Liquid products require the injection holes to be drilled at a slight downward angle or sealed after injection to prevent the product from running out. Low-pressure injection equipment (hand pump or motorised pump) is typically required to achieve controlled dosing. This increases application complexity compared to cream products but ensures uniform distribution across the full wall width in dense masonry.
Like all chemical DPC injection systems, liquid injection treats capillary rise only. Old salt-contaminated plaster must be stripped and replaced with WTA-compliant salt-resistant renovation plaster after injection. The wall must then be allowed to dry before any non-breathable finish is applied.
Do not confuse with:
- Silane cream DPC injection (Dryzone, SikaMur InjectoCream-100) — cream consistency, no pump required, preferred for standard porous masonry
- Surface-applied siloxane water repellents (facade creams, masonry treatments) — surface treatment only, does not create a barrier within the wall
- Crystalline waterproofing injection (PU injection, acrylic injection) — used for active water ingress under pressure — not a rising damp DPC system
- Electro-osmotic damp proofing — different operating principle — confirm evidence base before specifying
Product Reference
2 products — 2 brands — siloxane liquid DPC injection — for dense and low-porosity masonry
System Description
Remmers Kiesol is a concentrated silane/siloxane liquid DPC injection product — the benchmark fluid injection product in Remmers' WTA-referenced rising damp treatment system. Unlike silane cream products, Kiesol is a liquid that relies on the capillary suction of the masonry and/or low-pressure injection to draw the product into the wall cross-section. The active chemistry is potassium methyl siliconate, which penetrates into the pore structure and creates a hydrophobic barrier within the wall. Liquid injection has advantages over cream injection in specific situations: it can penetrate into denser masonry substrates more effectively than cream, and it can be injected under controlled low pressure to ensure even distribution across the wall width. However, it requires injection equipment capable of maintaining low pressure, and the holes must be sealed or drilled at a slight downward angle to prevent the liquid from running out before curing. Kiesol is part of Remmers' complete WTA-referenced rising damp system, which specifies Kiesol or Kiesol C injection followed by Remmers SP renovation plasters. The complete Remmers system provides consistent technical documentation for the full treatment sequence. Confirm current product specification, injection equipment requirements and availability with Remmers Australia.
Technical Properties
- Concentrated silane/siloxane liquid — potassium methyl siliconate base — penetrates masonry pore structure under low pressure or capillary suction
- Lower viscosity than cream — penetrates into denser masonry substrates where cream may not achieve full depth penetration
- WTA-referenced system — Remmers injection and renovation plasters form a coordinated system with consistent technical documentation
Limitations
- Liquid consistency — holes must be drilled at a slight downward angle (10–15°) or sealed after injection to prevent product running out before cure
- Low-pressure injection equipment may be required for thick walls or dense masonry — not a simple cartridge gun application
- Replastering with Remmers SP renovation plaster is mandatory after injection — liquid injection alone does not complete the treatment
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Description
Wykamol (Safeguard Europe) supply siloxane-based liquid DPC injection products as an alternative to their Dryzone cream in situations where liquid injection is preferred — specifically for dense or low-porosity masonry where the cream may not achieve full penetration depth, or where injection pump equipment is available and the specifier prefers a pressure-injected liquid system. Siloxane liquid DPC products from Safeguard/Wykamol use siloxane chemistry that penetrates the masonry pore structure and creates a hydrophobic barrier. The liquid formulation offers very low viscosity for maximum penetration depth into dense substrate pores. Application typically requires injection under low positive pressure using a hand pump or motorised injection pump system. Confirm the current product name and product range for liquid siloxane DPC injection with Wykamol Australia, as product names and formulations in the Safeguard/Wykamol range may vary between markets. Confirm availability and technical support before specifying on a project.
Technical Properties
- Siloxane chemistry — very low viscosity liquid — maximum penetration depth into dense masonry pore structure
- Suitable for dense and lower-porosity masonry where silane cream may not achieve full wall width penetration
- Pressure injection allows controlled dosing across wall width — suitable for thick walls (>450mm) where cream may not fully penetrate
Limitations
- Pressure injection equipment required — not a simple cartridge gun system — increases application cost and complexity
- Holes must be sealed or drilled at an angle — liquid will run out of unsealed holes before curing is complete
- Replastering with salt-resistant renovation plaster is mandatory after injection — liquid DPC alone does not complete the treatment
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Brand Equivalents
Liquid DPC injection products. * Confirm product name and specification with Wykamol Australia before specifying.
| System type | Remmers | Safeguard / Wykamol |
|---|---|---|
| Siloxane/silane liquid — standard liquid DPC injection | Kiesol | Basecourse DPC Fluid* |
| Silane/siloxane cream (cross-reference) | Kiesol C | Dryzone |
Liquid injection requires sealed or angled holes — product will run out of open vertical holes
- Unlike cream products, liquid siloxane will drain from an open vertical hole under gravity — holes must be drilled at a 10–15° downward angle or sealed with a plug after injection
- Low-pressure injection equipment (hand pump or motorised pump) is required to control dosing and achieve uniform distribution across the wall cross-section
- Confirm injection pressure limits with the manufacturer — excessively high pressure may damage mortar or cause the product to bypass the target zone
- As with all chemical DPC systems: replastering with salt-resistant renovation plaster is mandatory after liquid injection — liquid DPC alone does not complete the treatment
Disclaimer
Information is general only. Product selection must be confirmed against project requirements, masonry type and density, manufacturer technical data sheets, and applicable standards including WTA 2-6-99 and BS 6576. Rising damp diagnosis should be confirmed by a qualified building pathologist before treatment. Do not rely on this reference as a substitute for professional advice.