Zecto Ultimax 402
Zecto Ultimax 402 is a premium-grade, heavy-duty tile adhesive developed for extreme performance requirements. Designed for large-format tiles and stone cladding, it offers superior bonding strength, flexibility, and long-term reliability.
Product Overview
Zecto Ultra is a Polymer modified thin-set adhesive for fixing all types of tiles, stones, and marbles on horizontal and vertical surfaces in internal and external dry or wet areas and swimming pools over cementitious substrates.
Key Features
Discover what makes Ultimax 402 the right choice for your project
Maximum bond strength for heavy and large tiles
High flexibility for thermal and structural movement
Excellent resistance to moisture, heat, and vibration
Extended open time for complex installations
Suitable for premium and industrial applications
Application Areas
Ideal use cases for Ultimax 402
Exterior façades and high-rise claddings
Industrial floors and commercial spaces
Luxury interiors and swimming pools
Large vitrified tiles, marble, granite, and stone
Application Procedure
Follow these steps for optimal results
Ensure substrate is properly prepared, clean, and cured.
Mix with clean water to achieve optimal consistency.
Apply with proper notched trowel ensuring even coverage.
Back-butter large tiles for complete adhesive contact.
Allow sufficient curing time before grouting.
Points to Consider
Important notes for best results
Ensure complete adhesive contact under tiles.
Allow sufficient curing time before grouting.
Protect freshly laid tiles from rain and traffic.
Technical Specifications
Detailed product performance data
Mixing Ratio
3.5:1 (Powder to Water)
Pot Life
>3 Hours
Open Time
~35 minutes
Adjustability Time
~30 minutes
Initial Set Time
Final Set Time
24 Hours
Adhesion Strength
Temperature Range
5°C to 40°C
Coverage & Consumption
Estimated coverage based on tile size (per 20 kg bag)
* Coverage may vary based on substrate condition, tile type, and application method.
Storage & Shelf Life
Shelf Life
12 months from date of manufacture
Storage Conditions
Store in a cool, dry place away from direct sunlight. Keep bags sealed and off the ground on pallets.
Frequently Asked Questions
Common questions about Ultimax 402
What is the mixing ratio for Zecto Ultimax 402?
What is the mixing ratio for Zecto Ultimax 402?
Mix 20 kg of powder with 5.2-6.0 liters of clean water (26-30% by weight) to a smooth, high-build paste. Mature for 5 minutes, remix, then apply.
How is Ultimax 402 different from Ultra 302?
How is Ultimax 402 different from Ultra 302?
Both are flexible C2TES1 adhesives. Ultimax 402 is the premium Type 4 grade with higher bond strength and a longer adjustability window — built for the most demanding jobs: large stone slabs, GVT panels, heavy cladding and high-movement substrates.
Can Ultimax 402 fix large slabs and non-porous tiles?
Can Ultimax 402 fix large slabs and non-porous tiles?
Yes. Its high polymer content bonds large-format slabs, full-body vitrified tiles and low-absorption surfaces such as glass and porcelain. Back-butter slabs above 600 mm for 100% contact.
Is Ultimax 402 suitable for exterior façades and cladding?
Is Ultimax 402 suitable for exterior façades and cladding?
Yes, for exterior walls, façades and wet areas. For high-rise cladding, combine with mechanical anchorage as per the project's structural specification.
How long before grouting and foot traffic?
How long before grouting and foot traffic?
Allow a minimum of 24 hours of curing before grouting and light foot traffic; allow longer in cold or humid conditions.
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