Zecto Ultra 302
Zecto Ultra 302 is a flexible, high-strength tile adhesive designed for demanding internal and external applications. With S1 flexibility, it accommodates substrate movement and temperature variations, ensuring long-term durability.
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 Ultra 302 the right choice for your project
S1 flexibility to absorb structural and thermal movement
Excellent adhesion on difficult substrates
Extended open time and high workability
Water, frost, and weather resistant
Suitable for heavy-duty and high-traffic areas
Application Areas
Ideal use cases for Ultra 302
Exterior façades and claddings
Balconies, terraces, and wet areas
Swimming pools and commercial spaces
Large vitrified tiles and natural stone
Application Procedure
Follow these steps for optimal results
Prepare substrate ensuring it is structurally sound and clean.
Mix with clean water following recommended ratio.
Apply using appropriate notched trowel.
Fix tiles within open time with full coverage.
Allow proper curing before grouting and use.
Points to Consider
Important notes for best results
Substrate must be structurally sound and clean.
Avoid application during rain or freezing conditions.
Maintain recommended water-to-powder ratio.
Technical Specifications
Detailed product performance data
Mixing Ratio
3.5:1 (Powder to Water)
Pot Life
>2 Hours
Open Time
~35 minutes
Adjustability Time
~30 minutes
Initial Set Time
4-6 hours
Final Set Time
24 Hours
Adhesion Strength
>= 1.0 N/mm² (C2), deformation class S1 (2.5-5 mm)
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 Ultra 302
What is the mixing ratio for Zecto Ultra 302?
What is the mixing ratio for Zecto Ultra 302?
Mix 20 kg of powder with 5.2-6.0 liters of clean water (26-30% by weight) to a smooth, creamy paste. Let it mature for 5 minutes, remix, then apply.
What does the S1 flexibility rating mean?
What does the S1 flexibility rating mean?
S1 is a deformable adhesive that flexes 2.5-5 mm under load. It absorbs thermal movement and substrate stress — essential for terraces, balconies and large-format tiles that expand and contract in the sun.
Can Ultra 302 be used in swimming pools and wet areas?
Can Ultra 302 be used in swimming pools and wet areas?
Yes. The flexible, water-resistant C2TES1 formulation is recommended for swimming pools, bathrooms, balconies and roof terraces. Always apply a waterproofing membrane such as Zectoproof SBR Latex underneath in wet zones.
Is Ultra 302 suitable for large-format and heavy tiles?
Is Ultra 302 suitable for large-format and heavy tiles?
Yes. It holds large-format vitrified tiles and stone slabs. For tiles above 600 mm, back-butter the tile and use a 10-12 mm notched trowel for full coverage.
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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