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IS 16186:2014 is the Indian Standard (BIS) for liquid applied waterproofing membranes based on polymer modified cementitious systems - specification. This standard specifies the requirements for two-component, polymer-modified, cement-based liquid-applied waterproofing membranes. It covers classification based on crack-bridging ability, material property requirements, and performance criteria for the cured membrane, such as tensile strength, adhesion, and water impermeability.
Specifies requirements for liquid applied waterproofing membranes based on polymer modified cementitious systems.
Overview
Status
Current
Usage level
Frequently Used
Domain
Materials Science — Waterproofing and Damp Proofing
EN 14891:2017CEN (European Committee for Standardization), Europe
HighCurrent
Liquid-applied water impermeable products for use beneath ceramic tiling bonded with adhesives - Requirements, test methods, evaluation and verification of constancy of performance, classification and marking
Both specify performance for liquid-applied polymer-modified cementitious waterproofing membranes, but EN 14891 focuses on use under tiles.
ANSI A118.10-2020ANSI / TCNA (American National Standards Institute / Tile Council of North America), USA
HighCurrent
American National Standard Specifications for Load Bearing, Bonded, Waterproof Membranes for Thin-Set Ceramic Tile and Dimension Stone Installation
Specifies test methods and minimum requirements for waterproof membranes behind tile and stone, a key application for IS 16186 products.
AS/NZS 4858:2004Standards Australia / Standards New Zealand, Australia/New Zealand
MediumCurrent
Wet area membranes
Covers performance of membranes for internal wet areas, including liquid-applied types, but is not exclusive to cementitious systems.
Key Differences
≠IS 16186 has a broader application scope, covering general waterproofing like roofs and basements, whereas EN 14891 and ANSI A118.10 are specifically for membranes used under tile and stone installations.
≠EN 14891 includes mandatory classifications for crack bridging at low temperatures (-5°C and -20°C), a critical performance metric not required or specified in IS 16186, which tests only at ambient temperature (27 ± 2 °C).
≠The hydrostatic pressure test in IS 16186 (Type II) is more severe (50m head / ~5 bar) than in EN 14891 (1.5 bar). This reflects a focus on more demanding water-retaining applications in the Indian standard.
≠IS 16186 specifies minimum elongation at break values for the free film (Type I: ≥30%, Type II: ≥80%), while EN 14891 does not specify this directly, focusing instead on functional tests like crack bridging.
Key Similarities
≈All standards are performance-based, defining requirements through a series of standardized laboratory tests rather than by prescriptive formulation.
≈Tensile adhesion strength (bond strength) is a fundamental requirement in all standards, with tests conducted after various conditioning cycles like water immersion and heat ageing.
≈Crack bridging capability is a key performance criterion in both IS 16186 and its international equivalents, recognizing the need for membranes to accommodate minor substrate movements.
≈Water impermeability is a core test in all compared standards, although the specific test pressure and duration may vary, it establishes the primary function of the membrane.
Parameter Comparison
Parameter
IS Value
International
Source
Initial Tensile Adhesion Strength
≥ 0.5 N/mm²
≥ 0.5 N/mm²
EN 14891:2017
Tensile Adhesion Strength after Water Immersion
≥ 0.5 N/mm²
≥ 0.5 N/mm²
EN 14891:2017
Water Impermeability (Hydrostatic Pressure)
No leakage at 50m head (~5 bar) for 7 days (Type II)
No penetration at 1.5 bar for 7 days
EN 14891:2017
Crack Bridging (Ambient Temp)
Type I: ≥ 0.75 mm; Type II: ≥ 1.5 mm
≥ 0.75 mm (for class CM)
EN 14891:2017
Crack Bridging (Low Temp)
Not specified in standard
≥ 0.75 mm at -20 °C (for class CM O2)
EN 14891:2017
Adhesion after Freeze-Thaw Cycles
≥ 0.5 N/mm²
≥ 0.5 N/mm²
EN 14891:2017
Elongation at Break
Type I: ≥ 30%; Type II: ≥ 80%
Not a primary specified parameter; performance is assessed via functional crack-bridging test.
EN 14891:2017
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
Minimum Tensile Strength (Class II)0.5 N/mm²
Minimum Elongation at Break (Class II)50 %
Minimum Adhesion Strength (Pull-Off)0.5 N/mm²
Water Penetration RequirementNo penetration at 5 bar for 7 days
Crack Bridging Ability (Class II, 23°C)0.75 mm
Water Vapour Transmission Rate (max)30 g/m²/24h
Tables & Referenced Sections
Key Tables
Table 1 - Classification of Membranes
Table 2 - Requirements for Polymer Component
Table 3 - Requirements for Cementitious Component
Table 4 - Performance Requirements of the Applied Membrane
Key Clauses
Clause 4 - Classification
Clause 5 - Requirements of Components
Clause 6 - Performance Requirements of the Applied Membrane