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A retrofit seal for existing floor waste penetrations. The polymer cap sits over the penetration and seals watertight, blocking sewer gas as soon as it is on: no slab cutting, no pipe replacement, no debris falling into the waste while you work.
Waterproof over it straight away. It suits ceramic and concrete substrates in wet areas from home bathrooms to commercial kitchens and public washrooms.
Does the Wondercap RetroFit puddle flange sit on top of the finished floor?
No. Wondercap specifies that the 3 mm flange is rebated at least 3 mm into the substrate and bedded on sealant so the flange is fully supported and flush with the floor build-up.
Wondercap RetroFit Kit for installing a flush-mount puddle-flange drainage assembly into existing concrete or timber wet-area floors.
Designed for renovations and repairs after the floor structure already exists.
Available in 100×100 mm, 100×80 mm and 100×50 mm configurations; the kit includes a RetroFit puddle flange, base and cap.
Prepare a clean renovation opening and rebate the substrate at least 3 mm for the puddle flange.
Bed the flange on sealant for full support, use its fixing points to secure the perimeter and fit the coloured test plug to keep construction debris out and enable waterproofing water testing.
Integrate the waterproofing membrane with the flange to the current Wondercap wet-area detail before completing the screed, tile and grate assembly.
The 3 mm puddle flange must be rebated at least 3 mm into the substrate so it installs flush.
The flange must be fully supported on sealant and fixed in accordance with the Wondercap installation detail.
Select the kit size to match the existing waste connection; it is a retrofit drainage/waterproofing component, not a structural pipe-repair system.
- Existing concrete wet-area floors
- Timber or fibre-cement wet-area floors prepared for the required rebate
Wondercap RetroFit Kit Physical Properties
| Property | Value |
|---|---|
| Product Name | Wondercap RetroFit Kit |
| Application | Plumbing installations, renovations, and repairs |
| Material | High-durability polymers |
| Key Features | Retrofit capability, watertight seal, prevents debris ingress |
| Uses | Wet area renovations, retrofitting in bathrooms and kitchens, sealing concrete penetrations |
| Limitations | Requires standard pipe sizes, proper installation required |
| Suitable Substrates | Concrete, ceramic tiles, waterproof membranes |