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Grey Tile Adhesive GTA – Type – 4

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Heavy-Duty Natural Stone & Wall Cladding Adhesive for Demanding Areas

Protector GTA-4 Large Grey Tile Adhesive from RVM DRY MIX™ is a high-performance, polymer-modified cementitious adhesive specially developed for fixing vitrified tiles, marble stone, and granite stone in demanding applications such as large tile cladding, dry surfaces, swimming pools, and tile-on-tile installations. Classified as C2TES2, GTA-4 offers enhanced bond strength, slip resistance, and superior deformability for high-performance tiling projects.

Formulated for a medium-bed thickness of 5–6 mm, GTA-4 creates a robust, even adhesive layer that accommodates the weight of marble, granite, and heavy vitrified tiles. Its creamy, trowel-friendly consistency offers excellent wetting of the substrate and tile back, while enhanced slip resistance (T) and S2 deformability support secure fixing on vertical surfaces, large tile cladding systems, and demanding applications where flexibility and performance are critical.

A 20 kg bag of Protector GTA-4 covers approximately 25–30 SFT of tiling area at the recommended 5–6 mm thickness, making it ideal for high-value stone finishes in swimming pools, feature walls, façades, and tile-on-tile refurbishments. Manufactured in accordance with IS 15477:2019, EN12004, and ISO 13007:2017 standards, GTA-4 delivers consistent performance, high bond strength, superior flexibility, and long-lasting aesthetics for premium residential and commercial projects.

Protector GTA-4 Large Grey Tile Adhesive

Key Features & Benefits

High Strength for Heavy Stones

Specially designed for marble, granite, natural stones, and large vitrified tiles, delivering excellent bond strength for both vertical and horizontal applications.

Enhanced Vertical Slip Resistance

Medium-bed formulation and polymer modification minimise tile slippage on walls and cladding, helping maintain perfect alignment during installation.

Suitable for Pools & Wet Areas

Recommended for swimming pools and other water-retaining structures when used over properly waterproofed substrates, providing durable, water-resistant bonding.

Tile-on-Tile Refurbishment

Suitable for tile-on-tile installations on sound existing tiles, helping upgrade old finishes without full demolition and reducing renovation downtime.

40-Minute Open Time

Offers up to 40 minutes open time and 40 minutes adjustability time, providing greater flexibility during installation of large tiles and natural stones.

S2 High Flexibility

Advanced S2 deformability helps accommodate substrate movement and thermal stresses, making it suitable for demanding tile cladding and premium stone installations.

Optimised for 5–6 mm Bed

Medium-bed application of 5–6 mm supports the weight of heavy tiles and stones while achieving full contact and long-term stability.

Recommended Applications

Large Tile & Stone Cladding

Ideal for large tiles and stone cladding on façades, feature walls and high-impact vertical surfaces.

Natural Stone Installations

Developed for fixing marble, granite, and other natural stones on interior and protected exterior substrates with reliable bonding.

Swimming Pools & Tile-on-Tile

Recommended for swimming pools, tile-on-tile renovations, dry surfaces, and other demanding applications requiring high bond strength and flexibility.

Packaging & Storage

Net Weight

Supplied in 20 kg laminated BOPP bags for safe handling and stacking on site.

Shelf Life

Best before 12 months from the month of manufacture when stored in dry, damp-proof, and covered conditions in unopened bags.

Storage Conditions

Store in a cool, dry, and covered area, away from rain and direct sunlight. Keep bags on pallets and avoid contact with floors or damp surfaces.

Safety Directions

Hazard Warning

Contains cementitious materials that may cause skin irritation and eye damage on direct contact. Handle responsibly.

Precautions

Avoid breathing dust. Wear gloves, dust mask, and safety goggles while mixing and applying. Wash hands thoroughly after handling.

First Aid

If irritation occurs, wash affected area with plenty of clean water. In case of eye contact or persistent discomfort, seek medical attention immediately.

Usage Guidelines

Surface Preparation

  • Ensure substrates such as concrete, cement screeds, plastered walls, or existing tiles are structurally sound, clean, and fully cured.
  • Remove dust, laitance, loose particles, oil, paint, curing compounds, or contaminants that can affect adhesion.
  • For swimming pools and water bodies, ensure a sound, properly waterproofed base before applying GTA-4.
  • Lightly dampen very absorbent surfaces if required, but do not allow standing water on the substrate.

Mixing Instructions

  • For each 20 kg bag of GTA-4, use approximately 4.8–5.2 L of clean water.
  • Pour water into a clean container, gradually add the powder, and mix using a slow-speed mechanical stirrer (or manually) until a smooth, lump-free paste is obtained (about 3 minutes).
  • Allow the mix to rest for 2–3 minutes, then remix briefly before use to enhance workability.
  • Use the prepared adhesive within its pot life of about 60 minutes. Do not re-temper with extra water once the mix starts to stiffen.

Application Guidelines

  • Spread adhesive using an appropriate notched trowel, maintaining a bed thickness of 5–6 mm.
  • For heavy stones and large tiles, apply adhesive on both substrate and tile back (back-buttering) to ensure full contact.
  • Place tiles into the wet adhesive within the open time of about 40 minutes, sliding slightly to achieve full coverage.
  • Tap tiles with a rubber or wooden mallet to remove trapped air and achieve proper alignment. Protect from traffic and fill joints only after adequate setting, typically after 24 hours.

Technical Specifications

Parameters Specifications
Form Factory-blended grey, cementitious powder
Tile / Stone Types Large ceramic tiles, vitrified tiles, marble stones & granite stones
Recommended Bed Thickness 5–6 mm medium-bed application
Open Time Approx. 40 minutes (depending on site conditions)
Adjustability Time Up to 40 minutes after tile placement
Pot Life About 60 minutes after mixing under normal conditions
Water Requirement 4.8–5.2 L of clean water per 20 kg bag
Coverage 20 kg of adhesive covers about 25–30 SFT of tiles at 5–6 mm thickness
Bond Strength High adhesion suitable for heavy natural stones, cladding & high-duty areas
Foot Traffic / Grouting Typically after 24 hours (depending on temperature & substrate)
Classification C2TES2
Slip Resistance Class T
Deformability Class S2
Packaging 20 kg laminated BOPP bags
Shelf Life Best before 12 months from date of manufacture in dry, covered storage

frequently asked questions

RVM Protector GTA-4 is a high-performance grey tile adhesive designed for natural stones, wall cladding, vitrified tiles, marble stones, and granite stones. It is suitable for demanding applications such as swimming pools, tile-on-tile refurbishments, large tile cladding, and premium stone installations.

As per the bag, GTA-4 is recommended for large tiles cladding, natural tiles cladding, swimming pools and tile-on-tile applications. It is also suitable for bathrooms, kitchens, walls and other high-duty interior or protected exterior areas when applied over sound, prepared substrates.

GTA-4 is formulated to fix vitrified tiles, marble stones and granite stones, along with other dense natural stones and large-format tiles, on properly prepared substrates.

The adhesive is designed for a bed thickness of 5–6 mm. According to the bag, 20 kg of GTA-4 covers around 25–30 SFT of tiles at this thickness. Actual coverage will depend on substrate levels, trowel notch size and tile type.

Yes. GTA-4 is listed on the bag for swimming pool applications, when used over a properly waterproofed structure and with correct joint sealing. Always allow adequate curing of the adhesive and grout before filling the pool with water as per good tiling practice.

For a 20 kg bag, use approximately 4.8–5.2 L of clean water. Add powder to water and mix until a smooth, workable paste is obtained. Do not exceed the recommended water ratio, as this can reduce strength and adhesion.

As indicated on the product, GTA-4 offers an open time of about 40 minutes and an adjustability time of 40 minutes. Tiles should be fixed and aligned within this period for best results.

S2 deformability indicates a highly flexible adhesive capable of accommodating greater substrate movement and stress while maintaining strong tile adhesion.

GTA-4 has a 12-month shelf life from the month of manufacture when stored in a dry, damp-proof and covered place. Keep bags on pallets, away from ground moisture and direct weather exposure to preserve quality.

GTA-4 contains cement and mineral fillers. Avoid contact with eyes and skin and do not inhale dust. Always wear protective gloves, mask and goggles while mixing or applying. In case of irritation, rinse with plenty of water and seek medical attention if required.
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