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Waterstop Streamline 90° Corner (2 Leg) is a pre-mitred waterproofing profile designed for L-shape residential showers to standardise screen alignment and ensure watertight integrity. Fabricated from 6463–T5 aluminium, this integrated system features a built-in tile height gauge to guide screed falls and a bullnose lip that helps a continuous seal between the membrane and frameless glass screens.
This Australian-manufactured solution simplifies compliance with AS 3740:2021 by providing a factory-squared 90° join that eliminates onsite cutting errors and prevents common delamination issues at the substrate interface.
Frequently asked questions
Can I install the 90° corner over an existing screed?
No, this product must be installed before screeding. It functions as both a fall guide and a barrier, requiring installation directly onto the subfloor to ensure proper waterproofing and screed integration.
Is the 90° corner supplied as a single preformed unit?
Yes, the 90° corner model is supplied as a single, preformed profile with two legs. This eliminates the need for onsite mitring, simplifying installation and reducing potential points of failure.
Can this corner be used with frameless glass shower screens?
Yes, it is designed for compatibility with frameless screens. Frameless glass can be sealed directly to the bullnose lip using silicone, providing a secure and continuous seal with the membrane below.
What if the shower area is not perfectly square?
The profile's legs can be trimmed onsite using a hacksaw or drop saw to match specific dimensions. Always ensure a tight fit against the wall for effective membrane sealing.
Applications and benefits
| Application | Key benefit | Primary trades |
|---|---|---|
| L-shaped (two-wall) shower construction | Creates a compliant, leak-free corner barrier with integrated shower screen support, meeting AS 3740:2021 requirements. | Builders, Waterproofers, Tilers |
| Volume residential bathroom fit-outs | Reduces installation time and standardises shower screen alignment by providing a preformed, consistent fall guide and screen support. | Builders, Developers |
| Hob-less or frameless shower installations | Provides a stable bullnose lip for direct silicone sealing of frameless screens, eliminating hobs and maximising usable space. | Tilers, Glaziers, Renovators |
| Renovations with limited bathroom space | Allows for efficient, compliant shower construction without the bulk of traditional hobs, optimising floor area. | Renovators, Designers |
Applying Waterstop Streamline – 90° Corner: Protocols & Best Practices
General Application Steps:- Dry Fit: Position the profile in the corner. Use a pencil to trace inside and outside lines of both legs.
- Surface Prep: Clean and prime if required. Apply continuous bead of urethane sealant between pencil lines.
- Install Profile: Gently press into position. Use level to confirm both legs are even. Wedge if necessary.
- Seal Ends: Apply urethane sealant at floor-to-wall junctions and corner gussets. Tool smooth for full adhesion.
- Waterproof: Apply membrane under and up behind bullnose, avoiding the outer lip. Apply two full coats.
- Screed and Tile: Screed to tile gauge. Tile flush to both sides. Silicone screen to inner lip after tiling.
Product limitations
- Not for: Retrofitting over existing tiles or screed. The corner must be installed prior to screeding to function as designed.
- Not for: External waterproofing or use in areas exposed to UV radiation. This profile is designed for internal shower applications only.
- Requirement: Must be installed square to the wall to ensure correct alignment for membrane application and shower screen installation.
Safety and handling
Personal protective equipment
Wear protective gloves and eye protection during handling or when trimming the profile to prevent cuts from sharp edges.
Handling
Avoid denting the corner joint. Transport the profile within its original packaging with protective materials in place to prevent damage prior to installation.
First aid
- Cuts: For cuts from sharp edges, rinse the affected area, apply a bandage, and seek medical attention if the cut is deep.
- Inhalation: Avoid inhaling fumes from any associated urethane or solvent-based sealants. Ensure adequate ventilation.
Storage and disposal
Store the profile in its original packaging in a dry, protected area. Dispose of waste materials according to local regulations.
Substrate guide
Correct substrate preparation and adhesion are critical for the Waterstop Streamline 90° Corner to integrate effectively into the waterproofing system.
Concrete subfloors
Surface prep: Sweep the concrete clean, ensuring it is free from dust and debris. Mark the internal and external lines for accurate profile placement.
Primer: Required. Apply a urethane sealant to the subfloor before installing the profile to ensure proper adhesion.
Timber floors
Surface prep: The entire timber floor must be waterproofed before installing the waterstop profile. Use levelling wedges if necessary to achieve the required falls.
Primer: Required. A urethane sealant is needed for profile adhesion once the subfloor waterproofing is complete.
Membrane compatibility
Surface prep: This profile integrates with both sheet and liquid membranes. Ensure membranes are applied in two coats within the shower zone, extending up to the bullnose lip of the waterstop.
Primer: Not required for membrane adhesion to the waterstop itself, but system primers may be needed for membrane application to the substrate.
Waterstop Streamline 90° Corner (2 Leg) Physical Properties
| Property | Value |
|---|---|
| Profile Type | 90° Corner (2 Leg) |
| Material | Aluminium, Grade 6463–T5 |
| Wall Thickness | 3 mm |
| Sizes Available | 900 x 900 mm, 1000 x 1000 mm, 1200 x 1200 mm, 1400 x 1400 mm, 1500 x 1500 mm, 2000 x 1000 mm |
| Finish Options | Pearl White (PW), Bright Silver (BS), Brushed Aluminium (BA), Gloss Black (BL), Matt Black (MB) |
| Tile Compatibility | 6 mm to 10 mm systems |
| Compliance | AS 3740:2021 |
| Application Area | Internal corner showers |
| Substrates | Concrete, Timber, Screed |
| Membrane Compatibility | Liquid and Sheet |
| Screen Compatibility | Frameless, Semi-Frameless, Framed |
| Warranty | 6 years 6 months (manufacturing only) |
| Made In | Australia |