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Elastoproof Prefabricated Corner Sections: A Technical Overview
Engineered for precision corner sealing, Elastoproof Prefabricated Corner Sections provide a reliable waterproof and vapour barrier at critical 90º and 270º intersections. The integrated “flexible zone” maintains 100% elastic recovery under movement, preventing joint failures in high-stress locations. Unlike multi-layered reinforcement or sealant detailing, these prefabricated units streamline installation, reduce labour time, and ensure consistent performance. Manufactured for full compatibility with all Gripset waterproofing membranes, they deliver long-term protection in volatile areas such as wall/floor junctions and structural interfaces.
Core Features & Specifications
- Seamless elastic seal at joint intersections to prevent water ingress
- Waterproof and vapour barrier properties for long-term performance
- Fast, effective application with reduced labour time
- 100% elastic recovery under movement conditions
- High tear resistance and robust fabric reinforcement
- Eliminates lapping and bonding of fabrics at critical corner areas
- Fully compatible with all Gripset membranes
- Available in 200mm x 200mm size with 120mm wall/floor returns for both 90º and 270º corners
The Elastoproof Prefabricated Corner Sections Advantage
- Delivers consistent, professional-quality detailing at critical junctions
- Prevents costly failures by maintaining movement accommodation
- Simplifies membrane application in complex junction areas
- Reduces risk of voids, creases, or air pockets in corner sealing
- Engineered for Australian conditions with optimal temperature range of 5°C to 30°C
Proactive Troubleshooting
Scenario: Bedding corner into a partially dried membrane
Potential Outcome: Poor adhesion leading to water ingress at junctions
Adheseal Best Practice: Always embed corners into a wet film of Gripset membrane, ensuring full saturation of the fabric edges.
Scenario: Using incompatible solvent-based adhesives
Potential Outcome: Material degradation or loss of waterproofing performance
Adheseal Best Practice: Only use with compatible Gripset membranes and water-based systems.
Applications in Practice: Trade Scenarios
For Waterproofers (On-Site Applicator): Internal Corner Detailing in Bathrooms
The Professional's Challenge
Achieving a fully waterproof, movement-accommodating seal at internal corners without creating bulky overlaps or weak points.
The Adheseal Solution: Engineered Certainty in Practice
Embed the Elastoproof corner into wet Gripset membrane, ensuring full saturation of fabric edges. Overlap Elastoproof Jointing Band by a minimum of 40mm to maintain a seamless barrier.
Best Practice Note
Use a flat spatula to smooth out creases and remove trapped air before applying subsequent membrane coats.
For Tilers (Specifier/Installer): External Balcony Corner Waterproofing
The Professional's Challenge
Preventing water ingress at exposed balcony corners where thermal and structural movement is high.
The Adheseal Solution: Engineered Certainty in Practice
Install the external 270º corner unit into wet membrane, then integrate with surrounding waterproofing layers to form a continuous seal.
Best Practice Note
Install during mild weather (5°C to 30°C) to optimise adhesion and flexibility during curing.
Frequently Asked Questions
Can Elastoproof Prefabricated Corner Sections be used with non-Gripset membranes?
These corner sections are engineered for compatibility with all Gripset membranes. Using them with other membranes may compromise adhesion or performance, and should only proceed after compatibility testing.
What is the correct overlap when joining to Elastoproof Jointing Bands?
Always overlap Elastoproof Jointing Bands by a minimum of 40mm onto the prefabricated corner section to ensure a seamless, watertight seal.
Can I install these in cold or hot weather?
Installation should occur when surface temperatures are between 5°C and 30°C. Below or above this range, adhesion and flexibility may be reduced.
Do I need a primer before installing?
When used with Gripset membranes, a separate primer is typically not required. However, ensure the surface is clean, sound, and prepped according to membrane requirements before application.
What happens if the membrane skins before bedding the corner?
If the membrane skins before embedding, proper adhesion will not be achieved. Always bed corners into a fresh, wet film for full bond strength.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Internal 90º corner sealing in bathrooms and wet areas | Provides a seamless, elastic waterproof barrier without bulky overlaps | Waterproofers, Tilers |
| External 270º balcony corner detailing | Accommodates movement while preventing water ingress at exposed corners | Waterproofers, Tilers, Builders |
| Integration with Elastoproof Jointing Bands | Ensures continuous waterproofing with ≥ 40 mm overlap for long-term performance | Waterproofers, Remedial Contractors |
| Membrane junction reinforcement in volatile areas | Eliminates lapping/bonding issues at corners for a cleaner, stronger seal | Waterproofers, Builders |
| Wall-to-floor transition sealing | Improves tear resistance and durability at high-stress junctions | Waterproofers, Tilers |
Applying Elastoproof Prefabricated Corner Sections: Enhanced Protocols & Best Practices
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Surface Preparation
Ensure substrate is clean, dry, and structurally sound. Remove dust, debris, oils, and loose materials. Check substrate suitability and adhesion of associated products before starting.
Standard Cleaning
Use a stiff brush or vacuum to remove dust. Wipe with a damp cloth if required and allow to dry fully before membrane application.
Pre-Testing
Perform a small-area adhesion test with the chosen Gripset membrane to confirm compatibility and bond strength before large-scale application.
Timing: Complete surface preparation immediately prior to membrane application to prevent contamination.Pro Tip: Use Gripset’s surface preparation service for large or unusual substrates to ensure optimal results. -
Membrane Application
Apply a liberal, even coat of the selected Gripset membrane to the substrate at the corner location, covering 100% of the rear profile area.
Brush Application
Work membrane into the substrate with a brush to achieve full wetting. Apply thick enough to maintain a wet film until the corner is embedded.
Roller or Trowel Application
Spread evenly with a roller or notched trowel to the recommended membrane thickness, ensuring no gaps or thin spots.
Timing: Embed the corner into the wet membrane film immediately—do not allow skinning or drying before installation.Pro Tip: In warm climates, prepare smaller areas at a time to prevent premature membrane skinning. -
Embedding the Corner Section
Position the Elastoproof corner into the wet membrane bed. Fully wet out fabric edges and press firmly to ensure adhesion without voids.
Flat Spatula Smoothing
Smooth from the centre outwards to remove air pockets and creases. Work membrane through the fabric edges to ensure full contact.
Brush Integration
Brush membrane over the corner face and onto the adjacent substrate to seal fibres and create a continuous barrier.
Timing: Complete embedding in one continuous action before the membrane loses wet film properties.Pro Tip: Remove any excess membrane from the corner face to ensure a neat finish and facilitate subsequent coating layers. -
Integrating Jointing Bands
Overlap Elastoproof Jointing Bands by at least 40mm onto the corner piece using the same Gripset membrane for adhesion.
Seam Overlap
Apply membrane to the joint area, lay banding over the corner with the correct overlap, and press to integrate with the corner fabric.
Final Sealing
Coat over the seam and corner face to create a continuous, watertight finish.
Timing: Complete integration during the same membrane application stage to maintain wet-on-wet adhesion.Pro Tip: Use a light hand when embedding bands to avoid displacing the corner profile.
Limitations & Safety
Product Limitations
Not compatible with solvent-based materials (adhesives, sealants, coatings). Use only with compatible Gripset membrane systems.
Apply only when surface temperature is between 5 °C and 30 °C to ensure proper adhesion and performance.
Corners must be embedded into a fresh, wet membrane film; do not allow the membrane to skin before installation.
When integrating with Elastoproof Jointing Bands, maintain a minimum 40 mm overlap onto the prefabricated corner section.
Always confirm substrate suitability—conduct an adhesion test on typical areas, especially on unusual surfaces, before large-scale application.
Safety & Handling Requirements
Personal Protective Equipment
Handle in clean conditions. When installing with membranes/primers, wear PPE as directed by the membrane system’s SDS (e.g., gloves and eye protection). Avoid contact with solvent-based products.
Ventilation Requirements
Ensure adequate ventilation during membrane application as per the membrane manufacturer’s guidance. Do not use solvent-based products with this component.
Fire & Handling Precautions
The corner sections are installed with Gripset membranes; follow the membrane’s storage and ignition-source precautions. Do not introduce solvent-based adhesives, sealants or coatings during detailing.
Emergency First Aid
Eyes:
If membrane or debris contacts eyes during installation, rinse cautiously with water; seek advice per the relevant membrane SDS.
Skin:
Wash with soap and water after membrane handling. Discontinue use if irritation occurs and consult the membrane SDS.
Inhaled:
Move to fresh air if membrane vapours are present; follow the membrane SDS guidance.
Swallowed:
Follow the membrane SDS. Do not induce vomiting unless directed by medical personnel.
For unusual substrates or conditions, contact Gripset Technical Services before commencing application.
Elastoproof Prefabricated Corner Sections Application Guide
Concrete & Masonry
Surface Preparation
Substrate must be sound, clean and dry. Apply a liberal, even coat of the selected Gripset membrane to fully cover 100% of the rear corner profile. Embed the prefabricated corner into the wet membrane film and fully wet out the fabric edges; smooth with a flat spatula/brush to remove creases and trapped air. Remove excess membrane from the face and surrounding surface.
Primer Requirements
Primer optional – follow the primer requirements of the chosen Gripset membrane system.
When bedding into a wet Gripset membrane, an additional primer at the corner piece is typically not required; confirm per membrane TDS.
As specified by selected Gripset membrane systemFibre Cement & Compressed Sheet
Surface Preparation
Ensure sheets are fixed per manufacturer, clean of dust and residue. Apply sufficient wet Gripset membrane to cover the entire rear of the corner profile; embed immediately and wet out the fabric edges. Smooth out to eliminate creases/air pockets; brush off excess on the face.
Primer Requirements
Primer optional – use the primer specified for the membrane system if required for the sheet substrate.
Follow the membrane system primer guidance for porous sheet materials.
As specified by selected Gripset membrane systemPlasterboard (Wet Areas)
Surface Preparation
Confirm boards are suitable for wet areas and fixed true. Clean and dry surfaces. Apply a wet film of Gripset membrane covering the rear of the corner; embed and fully wet the fabric edges. Smooth to remove creases/air; remove excess membrane from the face.
Primer Requirements
Primer optional – check membrane system primer requirements for paper-faced boards.
Use the membrane system’s specified primer where substrate sealing is needed.
As specified by selected Gripset membrane systemTimber & Plywood (Framed Junctions)
Surface Preparation
Ensure substrates are rigid, fastened, and dry. Apply adequate wet Gripset membrane to cover 100% of the rear corner profile. Embed immediately; wet out fabric edges and smooth to expel air/creases. Brush away excess from the face/surrounds.
Primer Requirements
Primer optional – follow the membrane system’s primer recommendations for timber-based substrates.
Prime as per membrane TDS where timber sealing is required.
As specified by selected Gripset membrane systemExisting Membrane Interfaces & Transitions
Surface Preparation
Clean and abrade (if compatible) to ensure bond. Apply a fresh wet film of the selected Gripset membrane; embed the corner, fully wet the fabric, and smooth out. Remove excess from the face. Overlap Elastoproof Jointing Band by a minimum of 40 mm onto the corner piece for a seamless barrier.
Primer Requirements
Primer optional – confirm per the chosen Gripset membrane and existing surface condition.
Perform a small-area compatibility/adhesion test on unusual substrates before proceeding.
As specified by selected Gripset membrane systemApplication temperature: Apply only when surface temperature is between 5 °C and 30 °C. Avoid solvent-based adhesives, sealants, or coatings in contact with this component.
Sizing: Internal 90° and external 270° corners supplied at 200 mm × 200 mm with 120 mm wall/floor returns.
Compatibility: Designed for use with Gripset waterproofing membranes. For non-Gripset systems, conduct adhesion/compatibility testing before use.
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