Repair Systems — 01
Penetration collars — pre-formed and site-formed
Technical product reference for pre-formed and site-formed penetration collars used in balcony and terrace waterproofing remediation. Covers PVC, stainless steel, and EPDM rubber collar types, pipe diameter selection, membrane system compatibility, ARDEX and Mapei system options, installation sequence, and brand comparisons for Australian Class 2 strata building applications.
What are penetration collars?
Penetration collars seal the junction between a pipe, conduit or service and the waterproofing membrane where it passes through a balcony or terrace slab. The membrane cannot simply be lapped against the pipe — the junction is formed with a collar that gives a continuous, bonded seal around the full perimeter at membrane level, and collar failure is one of the most common causes of localised waterproofing failure. They come as pre-formed collars (PVC, stainless or flexible EPDM rubber, in fixed pipe diameters) and site-formed collars (built in situ from membrane and reinforcing fabric for non-standard or existing penetrations). Selection turns on the membrane system, the pipe diameter and section, and the bond at the collar flange — PVC suits liquid-applied membranes, stainless takes a torch-on heat-bonded lap, EPDM suits irregular sections, and site-formed collars are used only where no pre-formed collar fits.
Product Reference
Individual products — one card each — scroll to view all
ARDEX Australia
ARDEX Pre-formed PVC Pipe Collar
Pre-formed PVC flanged pipe collar — ARDEX systems
ARDEX pre-formed PVC pipe collars are factory-made flanged collars for sealing standard round pipe penetrations within ARDEX liquid-applied membrane systems, with the membrane lapped over and bonded to the flat PVC flange. Confirm pipe OD, overlap and primer requirements with ARDEX Australia.
Mapei Australia
Mapei Pre-formed Pipe Collar
Pre-formed PVC flanged pipe collar — Mapei systems
Mapei pre-formed pipe collars are factory-made PVC flanged collars for sealing standard round pipe penetrations within Mapei membrane systems, with the membrane lapped over the collar flange. Confirm pipe OD, the collar product and overlap against the current Mapei system specification.
Various — confirm with supplier
Stainless Steel Pipe Collar
Pre-formed stainless flanged collar — torch-on compatible
Pre-formed stainless steel pipe collars are required where torch-on sheet membranes must heat-bond to a metal flange, and are also compatible with liquid-applied systems. Specify Grade 316 for coastal exposure and confirm pipe OD and the bonding method with the supplier and membrane manufacturer.
Dektite / various — confirm distributor
EPDM Rubber Flexible Pipe Collar (Dektite)
Flexible EPDM compression collar — round & square pipe
EPDM rubber flexible pipe collars (e.g. Dektite) compress over a range of pipe diameters and both round and square sections, with the base flange lapped or bonded by the membrane. They suit non-standard and irregular penetrations — confirm the base-flange bonding method and membrane compatibility before applying.
ARDEX Australia
Site-formed Collar — ARDEX Components
Site-formed collar — ARDEX liquid membrane + fabric
Where no pre-formed collar fits, an ARDEX site-formed collar is built in situ from ARDEX liquid membrane and reinforcing fabric, encapsulating the penetration perimeter. It suits non-standard and existing penetrations within an ARDEX system — confirm method and lap dimensions with the current ARDEX specification and inspect as a hold point.
Mapei Australia
Site-formed Collar — Mapei Components
Site-formed collar — Mapei liquid membrane + fabric
Within Mapei systems, a site-formed collar is built in situ from Mapei liquid membrane and reinforcing fabric to form a continuous collar around non-standard penetrations. Confirm the method, lap dimensions and primer against the current Mapei system specification and inspect as a hold point before covering.
System Comparison
Penetration collars — confirm all selections against the current manufacturer TDS before specifying.
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Disclaimer
This page provides general technical information only. Final product selection must be confirmed against the current manufacturer technical data sheet, project specification, pipe diameter and material, membrane system compatibility, substrate condition, NCC requirements, AS 3740 waterproofing requirements, and applicator warranty conditions. Penetration collar installation is a critical hold point — confirm inspection requirements with the waterproofing consultant or certifier before proceeding. Do not rely on this reference as a substitute for professional waterproofing consultant or engineer advice.