Repair Systems — 03 — Facade & External Envelope
Saline-resistant primer & slurry systems
Technical product reference for saline-resistant primer and cementitious slurry systems applied to salt-contaminated masonry and concrete facades before WTA renovating render as part of a complete salt-attack remediation system. Covers products from Remmers, Mapei, and Rockcote.
What are saline-resistant primer and slurry systems?
Saline-resistant primers and cementitious bonding slurries are substrate preparation products applied to salt-contaminated masonry and concrete facades immediately before the application of WTA-classified salt-resistant renovating render. They provide a bonding bridge between the salt-retardant substrate treatment and the renovating render layer.
Product Reference
3 products — 3 brands — saline-resistant primer and slurry systems — scroll to view all
Remmers Vorspritzmörtel SP (WTA Spray Slurry)
WTA cementitious spray slurry — salt-affected substrate primer
System Description
Remmers Vorspritzmörtel SP is a WTA-compliant cementitious spray slurry (Vorspritzmörtel) applied to the substrate immediately before WTA renovating render application on salt-contaminated facades. It provides a bonding slurry layer that bridges the salt-retardant treatment and the renovating render. Confirm product name, application method, coverage, and system sequence with Remmers Australia. TODO: owner confirm — Remmers Vorspritzmörtel SP specification, WTA compliance and Australian availability.
Technical Properties
- WTA cementitious spray slurry
- Applied to substrate after salt-retardant treatment before WTA render
- Provides bonding key for renovating render
Limitations
- Applied wet — apply renovating render within correct time window — confirm from TDS
- TODO: owner confirm — Remmers Vorspritzmörtel SP specification and availability
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Mapei Renderfix / Polymer Bonding Slurry for Salt Substrates
Polymer bonding slurry — salt-affected substrate render primer
System Description
A polymer-modified cementitious bonding slurry applied to salt-affected masonry and concrete substrates before salt-resistant or breathable render. Confirm the specific Mapei product for polymer bonding slurry on salt-contaminated substrates with Mapei Australia technical — the Mapei range includes bonding and priming products suited to this application. TODO: owner confirm — specific Mapei product for saline-resistant primer/slurry on salt-affected substrates.
Technical Properties
- Polymer-modified cementitious bonding slurry
- Applied to clean salt-treated substrate before render
- Improves render adhesion on salt-contaminated surfaces
Limitations
- TODO: owner confirm — specific Mapei product for saline-resistant primer/slurry on salt-affected substrates
- Apply render within timing window specified in TDS
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Rockcote Saline Primer / Salt Substrate Slurry
Saline-resistant primer / cementitious slurry — salt-affected facade
System Description
Rockcote / Saint-Gobain Weber supplies primer and slurry products for salt-affected facade substrates. Confirm the specific Rockcote product for saline-resistant primer or bonding slurry on salt-contaminated substrates with Saint-Gobain Weber / Rockcote technical. TODO: owner confirm — Rockcote product for saline primer/slurry on salt-affected substrates.
Technical Properties
- Saline-resistant primer or cementitious slurry
- Applied before salt-resistant render
- Confirm product, coverage and application sequence with Rockcote technical
Limitations
- TODO: owner confirm — specific Rockcote saline primer/slurry product
- Confirm application timing window
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Comparison
Side-by-side comparison of saline-resistant primer and slurry systems. Confirm all product selections against the current manufacturer TDS before specifying.
| Product | Brand | Type | Application | Substrate type | Apply before | Primary use |
|---|---|---|---|---|---|---|
| Remmers Vorspritzmörtel SP | Remmers Australia | WTA cementitious spray slurry | Spray applied to substrate | Salt-contaminated masonry and concrete | Remmers WTA renovating render | WTA bonding slurry between salt-retardant treatment and WTA render |
| Mapei Renderfix / Polymer Slurry | Mapei Australia | Polymer-modified cementitious slurry | Brush-on to substrate | Salt-contaminated masonry and concrete | Salt-resistant or breathable render | Polymer bonding slurry on salt-affected substrates before render |
| Rockcote Saline Primer / Slurry | Rockcote / Saint-Gobain Weber | TODO: confirm with Rockcote | Confirm with Rockcote technical | Salt-contaminated exterior masonry | Rockcote salt-resistant render | Saline primer/slurry for salt-affected facade re-render |
Do not confuse saline primer and slurry with:
- Bonding agent (general purpose render bonding) — general-purpose acrylic or SBR bonding agents are not formulated specifically for salt-contaminated substrates; a saline primer is the salt-specific equivalent used in WTA systems
- Salt-retardant treatment — applied to substrate before the primer; the salt-retardant substrate treatment is stage 2 in the WTA system, and the saline primer/slurry is stage 3 — they are different stages, not the same product
- Salt-resistant renovating render — the render system applied over the primer; the saline primer/slurry is substrate preparation, not a render system
- Standard acrylic primer — not formulated for salt-affected substrates; standard acrylic primers are not compatible with WTA renovation render systems on salt-contaminated substrates
Disclaimer
This page provides general technical information only. Final product selection must be confirmed against the current manufacturer technical data sheet, project specification, substrate condition, exposure classification, AS 3700, NCC requirements, and applicator warranty conditions. Products marked TODO: owner confirm require verification before specifying. Do not rely on this reference as a substitute for professional engineering or facade consultant advice.