What is the main difference between Type 1 and Type 2 tile adhesives?

Type 2 has a higher minimum shear adhesion strength (> 1.5 N/mm²) compared to Type 1 (> 1.0 N/mm²), making it suitable for heavy-duty applications. (Table 1)

What does 'open time' mean for a tile adhesive?

It is the maximum time after application to a surface that a tile can be embedded to achieve the required bond strength. For a Type 1 adhesive, this is at least 20 minutes. (Table 1)

Can I use this adhesive for fixing natural stone like marble or granite?

This standard is for ceramic/mosaic tiles. For natural stones, which can be sensitive to moisture and staining, it is better to use adhesives specified under IS 15477, particularly class C2S1 or C2S2.

What is the maximum permissible slip for an adhesive used on walls?

The maximum slip for a vertically applied tile should be less than or equal to 0.5 mm. (Table 1)

IS 14896

: 2015

Adhesives for Fixing Ceramic and Mosaic Tiles - Specification

CurrentFrequently UsedSpecificationBIMMaterials Science · Flooring and Paving

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This standard specifies the requirements, sampling, and testing methods for polymer-modified cementitious adhesives used to fix ceramic and mosaic tiles. It classifies adhesives into four types based on performance characteristics like shear adhesion strength, slip, open time, and adjustability, ensuring proper selection for different applications.

Specifies requirements for adhesives used for fixing ceramic and mosaic tiles, covering types and performance.

Quick Reference Values

Min Shear Adhesion Strength (Type 1, Dry)> 1.0 N/mm²

Min Shear Adhesion Strength (Type 2, Dry)> 1.5 N/mm²

Min Open Time (Type 1)≥ 20 min

Max Slip (for vertical application)≤ 0.5 mm

Min Adjustability (Type 1)≥ 20 min

Min Shear Adhesion Strength after water immersion (Type 1)> 0.5 N/mm²

Practical Notes

Type 1 is a standard adhesive for general indoor applications on floors and walls, while Type 2 offers higher bond strength suitable for demanding areas, larger format tiles, or external applications.

Always check the 'open time' on the product packaging. Applying tiles after this period has elapsed will result in a significantly weaker bond.

The substrate must be clean, level, and free from dust or grease before applying the adhesive for optimal performance.