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Gripset 38FC

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Rapid-curing, fibre-reinforced SBR latex membrane for compliant waterproofing of wet areas, balconies, and roofs, allowing tiling in 4 hours.
Vendor: Gripset
SKU: GRIP38BLUE/5
Availability: In Stock
$93.63
$93.63
Prices do not include GST
Shipping & Delivery

Flat-rate shipping $17.95 + GST (metro and standard zones). Excludes remote/regional/high-cost postcodes and certain items (DG, oversized, long-length, or bagged products 15 kg+). If your order includes any of these, we will contact you to arrange additional freight charges. Online purchases only.

Achieve rapid project completion and high-performance waterproofing in covered internal and external areas. Gripset 38FC delivers this with a next-generation, fast-curing, fibre-reinforced SBR latex liquid membrane, engineered for reliability where time and performance are critical.

Why this product exists

Gripset 38FC was formulated as a next-generation solution for waterproofing applications that demand both speed and high performance. It specifically targets internal and external areas that will be covered by toppings, tile beds, or overlay finishes. Its fibre-reinforced SBR latex chemistry delivers rapid turnaround times for domestic and commercial projects, addressing the need for quicker project completion without compromising waterproofing integrity.

The numbers that matter

  • Tiling in 4 hours, flood test in 24 hours: This fast cure technology significantly reduces project delays. It allows for tiling or topping application the same day, getting trades back on site quicker.
  • >300% Class III elongation: This high flexibility rating means the membrane can stretch and recover with normal substrate movement. It bridges cracks up to 1mm, preventing leaks caused by building shifts.
  • Low water vapour transmission (0.6g/m²/24 hours): When installed as a liquid vapour barrier, this property prevents moisture vapour from migrating upwards. This protects adhesives and floor finishes from blistering and debonding.
  • Minimum 1mm dry film thickness: Applied in two coats, this ensures a robust, seamless waterproofing layer. It provides consistent protection against water ingress in continuously wet environments.

What it's like to use

Gripset 38FC is a viscous, blue liquid applied by brush or medium nap roller. Surfaces must be clean, sound, and primed first. For porous surfaces, use Gripset GP Primer. For non-porous substrates, Gripset OP Primer is recommended. Apply a minimum of two coats, ensuring each coat is applied in a different direction to the previous. Once dried, clean tools with water. Dried material requires mechanical removal.

For critical areas like joints, junctions, and penetrations, detailing with products like Elastoproof B50 Joint Band or BRW PF Tape and RLA MAX SMP 25 sealant is essential before membrane application.

Where this product excels

  • Covered balconies, podiums, door/window reveals, and flashings: It provides a flexible, fast-curing membrane that can be quickly covered with screeds, toppings, or tiles. Its fibre reinforcement enhances durability in these demanding external areas.
  • Internal wet areas, including bathrooms, laundries, and kitchens: The rapid recoat and tiling times significantly accelerate project schedules. This reduces overall construction time for both residential and commercial fit-outs.
  • Rooftop terraces under screeds and toppings: Acts as an effective liquid vapour barrier. This protects the overlying finishes from moisture migration, preventing issues like blistering or debonding.
  • Sandwich membrane between concrete substrates: It accommodates structural movement and prevents water ingress between concrete pours. This ensures long-term integrity in civil construction applications.

How it fits in a real system

Gripset 38FC often serves as a primary liquid membrane layer in complex waterproofing systems. In balcony and deck applications, it frequently follows the installation of prefabricated waterproofing corners for critical junctions. It also integrates into comprehensive internal wet area systems, typically applied after initial primers like Gripset GP Primer and other components such as Gripset BRW PF sheet membranes. Its position in the sequence allows for seamless integration and robust waterproofing.

Choose this when

  • When rapid project completion is critical: Its fast cure allows tiling or topping within 4 hours, and flood testing after 24 hours.
  • When waterproofing covered internal or external wet areas: This includes bathrooms, laundries, balconies, and rooftops that will receive an overlay finish.
  • When a flexible, fibre-reinforced membrane is needed: Its Class III elongation provides crack-bridging capabilities for normal substrate movement.
  • When a liquid vapour barrier is required: Use between toppings and slabs to prevent moisture-related issues with floor finishes.

Don't use this when

  • Not for: direct UV exposure or trafficable surfaces. It requires protection from direct sunlight and foot traffic to perform long-term.
  • Not for: areas subject to rising damp or negative hydrostatic pressure. A different product designed for these specific conditions is required.
  • Not for: application outside of 5°C to 30°C. Temperature extremes compromise the membrane's curing and performance.
  • Not for: unprimed substrates. Proper priming is essential for adhesion and system integrity.

Compliance with AS 4858 and AS 4654.1 confirms its suitability for internal and external wet area waterproofing applications. These Australian Standards provide assurance of performance for Class III membranes under typical Australian building conditions.

Gripset 38FC vs. standard liquid membranes

Gripset 38FC stands apart from more general-purpose liquid membranes like Gripset 51 Waterproofing Membrane due to its next-generation formulation. It offers significant advantages with its fast-curing properties and fibre reinforcement, specifically designed for applications that will be covered by screeds or tiles. While standard membranes offer reliable waterproofing, Gripset 38FC accelerates project timelines and provides enhanced tensile strength for covered internal and external areas. It is not designed for exposed, trafficable, or direct UV-resistant finishes, where a different membrane choice would be more appropriate.

Frequently asked questions

How quickly can I tile over Gripset 38FC?

You can tile or apply toppings over Gripset 38FC after just 4 hours, assuming ambient conditions of 23°C and 50% RH. This rapid cure profile allows for waterproofing and tiling to be completed within a single day, streamlining project timelines.

Is Gripset 38FC suitable for areas with continuous water exposure or ponding?

Yes, Gripset 38FC is engineered to withstand continuously wet environments and ponding water without re-emulsifying. It can be flood tested after 24 hours, providing confidence for applications such as balconies, decks, and roofs under toppings.

Do I always need to prime before applying Gripset 38FC?

Yes, priming is a mandatory step for all surfaces to ensure proper adhesion of Gripset 38FC. The correct Gripset primer must be selected based on the substrate's porosity and moisture content to prevent adhesion failure.

Can Gripset 38FC be left exposed to sunlight?

No, Gripset 38FC is not designed to be a finished membrane exposed to UV radiation. It must be covered by screeds, toppings, or tiles to protect it from environmental degradation and ensure its long-term performance.

Applications and benefits

Where Gripset 38FC is used, what it delivers, and who uses it
Application Key benefit Primary trades
Internal wet areas (bathrooms, laundries) Rapid waterproofing and tiling in a single day, compliant with AS 4858. Tilers, Waterproofers
External balconies, decks, podiums, terrace floors Withstands continuous wet environments, flood testable in 24 hours, compliant with AS 4654.1. Builders, Waterproofers, Landscapers
Roofs and rooftop terraces (under screeds/toppings) Acts as an effective liquid vapour barrier, provides flexible, fibre-reinforced protection. Roofers, Waterproofers
Sandwiching between existing and new concrete substrates Creates a durable, seamless barrier preventing moisture migration between layers. Concreters, Builders

Application Guide

  1. Surface Preparation: All substrates must be clean, sound, and free from oils, grease, curing compounds, dust, loose material, and other contaminants. Remove laitance from concrete; fill surface voids with compatible repair mortar. Ensure correct falls to drainage points.
  2. Priming: Apply primer according to substrate type:
    • Porous – Gripset GP Primer
    • Non-porous – Gripset OP Primer
    • Green/damp concrete – Xpress Primer H2O Plus
    • Rising damp – Gripset E60
    Allow primer to dry before membrane application.
  3. Junction & Penetration Detailing: Reinforce all corners, wall/floor junctions, and penetrations with Elastoproof B50 tape, Collars, or BRW PF Tape. For movement zones, use Adheseal HiFlex Construction or HiFlex 50 as a sealant fillet before membrane application.
  4. Membrane Application: Apply Gripset 38FC by brush, roller, or spray. Use a minimum of 2 coats at approximately 750 µm WFT per coat to achieve 1.0 mm total dry film thickness (~1.5 L/m² total coverage). Apply coats at right angles to each other.
  5. Recoating: At 23 °C/50% RH, recoat after approximately 1 hour or when the first coat is tack-free. Extend times in cool or humid conditions.
  6. Tiling & Covering: At 23 °C/50% RH, tiles or toppings may be applied after approximately 4 hours. Ensure membrane is fully cured and tack-free before covering.
  7. Flood Testing: Conduct flood testing after approximately 24 hours curing at 23 °C/50% RH. For cooler or humid environments, extend curing time.
  8. Clean-Up: Clean tools and equipment immediately after use with water. Once cured, the product must be removed mechanically.

Note: Protect the membrane from damage prior to installation of toppings or coverings. Always follow AS 3740 and AS 4654.1 for compliant installation.

Product limitations

  • Not for: Use as a trafficable surface or as a finished membrane exposed to UV radiation. The product must be covered by toppings, screeds, or tiles.
  • Application temperature: Do not apply when surface or ambient temperatures are below 5°C or above 30°C.
  • Moisture conditions: Not suitable for areas subject to rising damp or negative hydrostatic pressure. Ensure correct primer selection for damp substrates.
  • Rain: Do not apply if rain is imminent, as this can compromise the membrane's integrity during cure.
  • Finishing coatings: All finish coatings applied over this membrane must be water-based and solvent-free.

Safety and handling

Personal protective equipment

Wear safety shoes, overalls, nitrile gloves for intermittent contact, and safety glasses to prevent eye contact. Always wash hands before eating, drinking, or smoking.

Ventilation

Natural ventilation is adequate under normal use conditions. Ensure a well-ventilated area during application to avoid inhalation of vapours.

First aid

  • Inhalation: Remove victim to fresh air. Keep at rest until fully recovered. Seek medical advice if effects persist.
  • Skin Contact: Remove contaminated clothing. Flush skin and hair with running water. Seek medical assistance if irritation, swelling, or blistering occurs.
  • Eye Contact: Immediately flush eyes with water. Seek medical advice if irritation persists.
  • Ingestion: Rinse mouth with water. Do NOT induce vomiting. Give a glass of water. Seek medical advice.

Storage and disposal

Store in original unopened packaging in a cool, dry, well-ventilated place, away from direct sunlight. Avoid freezing conditions and cold floors. Shelf life is 12 months. Dispose of material and containers in accordance with local regulations; wet product can be cleaned with water, dried product requires mechanical removal.

Substrate guide

Proper substrate preparation and priming are critical for the long-term performance of Gripset 38FC and to prevent membrane failure.

Concrete, Render, and Masonry

Surface prep: Surfaces must be clean, sound, smooth, and dry, free from loose material, dirt, oils, and curing compounds. Concrete requires a minimum 28-day cure, and render/sand cement screeds a minimum 7-day cure. Fill all defects and level surfaces.

Primer: Required. For porous or absorbent surfaces, apply Gripset GP Primer (1L/8-10m²). For damp surfaces or those subject to rising damp, use Gripset E60 (1-2 coats at 1L/3m² per coat).

Compressed Fibre Cement Sheeting and Plasterboard

Surface prep: Ensure surfaces are clean, dry, sound, and free from dust or contaminants. Joints and screw heads should be flush and stable.

Primer: Required. Apply Gripset GP Primer (1L/8-10m²).

Wet Area Timber Sheeting and External Grade Plywood

Surface prep: Surfaces must be stable, clean, dry, and free of any coatings, grease, or loose particles. Ensure all structural requirements are met for wet area timber.

Primer: Required. Apply Gripset GP Primer (1L/8-10m²).

Aerated Concrete Panels and Blocks

Surface prep: Panels and blocks must be clean, dry, and free from dust and loose material. Surface defects should be filled and levelled.

Primer: Required. Apply Gripset GP Primer (1L/8-10m²).

Gripset 38FC Physical Properties

Gripset 38FC Physical Properties
Property Value
Form Viscous Liquid
Colour Blue
Specific Gravity 1.3 kg/litre
Shore A Hardness (ASTM D2240-97) 65
Elongation Classification (AS1145.3) >300% Class III
Tensile Strength (AS1145.3) >1 MPa
Water Absorption (AS 3558.1) 1%
Water Vapour Transmission (ASTM E96 Desiccant method) 0.6 g/m² /24 hours
Compliance to AS4858 PASS
Compliance to AS 4654.1 PASS
pH 9.5
Recoat Time 1 hour
Tiling/Toppings Time 4 hours
Full Cure/Flood Test 24 hours
Minimum Dry Film Thickness 1 mm

Gripset 38FC - Use Cases

Here are some common examples on where Gripset 38FC used by our customers.

Waterproofing

Balcony & Deck Waterproofing

Applying robust waterproofing on external balconies or decks, needing quick subsequent covering.

Its fibre-reinforced, fast-curing SBR latex formulation ensures project speed and a flexible, crack-bridging membrane for covered outdoor areas.

  • Tiling after 4 hours
  • AS 4654.1 compliant
  • >300% Class III elongation
  • 1.0mm dry film thickness

Tiling

Internal Wet Area Membrane

Waterproofing bathrooms, laundries, or kitchens before tiling, requiring rapid project turnaround.

Fast-curing properties allow tiling within hours, enabling quick project completion in internal wet areas with durable, seamless protection.

  • Recoat in 1 hour
  • Tiling after 4 hours
  • AS 4858 compliant
  • Withstands continuously wet environments

Flooring

Slab Vapour Barrier

Preventing moisture transfer from concrete slabs to toppings or floor finishes in covered areas.

Delivers low water vapour transmission and elasticity, protecting adhesives and finishes from slab moisture and accommodating movement.

  • 0.6g/m²/24 hours WVT
  • >300% Class III elongation
  • 1.0mm minimum dry film
  • Sandwich concrete substrates use

Waterproofing

Balcony Junction Detailing

Sealing complex junctions, overlaps, or critical areas on external balconies before applying overlay finishes.

Fibre-reinforced, fast-curing SBR latex provides durable, flexible weatherproofing for detailing and as a resilient top coat.

  • AS 4654.1 compliant
  • 4-hour tile over
  • fibre reinforced
  • >300% elongation

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