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IS 15809:2008 is the Indian Standard (BIS) for liquid applied polymeric waterproofing membranes. This standard specifies the requirements and test methods for single-component, liquid-applied polymeric waterproofing membranes used on concrete substrates. It covers the physical properties of the liquid membrane before application and the key performance characteristics like tensile strength, elongation, and water permeability of the cured membrane.
Specifies requirements for liquid applied polymeric waterproofing membranes.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! This 2008 edition is superseded by IS 15809:2017. Always refer to the latest version as requirements may have been updated.
! Substrate preparation, including cleaning, drying, and priming as per manufacturer's instructions, is critical for achieving the specified adhesion and overall performance.
! Ensure uniform application to achieve the specified Dry Film Thickness (DFT), as thin spots are common points of failure.
Standard Specification for High-Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane for Use with Separate Wearing Course
Covers elastomeric membranes for waterproofing, but specifically intended for use under a separate protective wearing course.
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 of conformity, classification and designation
Very similar technology but specifically focused on waterproofing membranes used under tiled finishes in wet areas.
EN 1504-2:2004CEN (European Committee for Standardization), Europe
MediumCurrent
Products and systems for the protection and repair of concrete structures - Part 2: Surface protection systems for concrete
Broader scope covering all surface protection for concrete, including but not limited to waterproofing coatings.
ETAG 005EOTA (European Organisation for Technical Assessment), Europe
HighWithdrawn
Guideline for European Technical Approval for Liquid Applied Roof Waterproofing Kits
Highly relevant for roofing applications, defining performance levels for liquid waterproofing kits, a common use for these membranes.
Key Differences
≠IS 15809 provides a single set of requirements, whereas European standards like EN 14891 and EN 1504-2 use a classification system with different performance levels (e.g., for crack bridging at low temperatures).
≠Crack bridging ability in IS 15809 is tested at ambient temperature (27±2 °C), while EN and ETAG standards often require more stringent testing at low temperatures (e.g., -10°C or -20°C).
≠The scope of IS 15809 is general, while standards like ASTM C836 are for use with a wearing course, and EN 14891 is specifically for use under tiles.
≠European standards (EN 1504-2) often require adhesion strength testing after various aging cycles (e.g., freeze-thaw, thermal shock), which is not explicitly required by IS 15809.
≠IS 15809 specifies minimum elongation at break as a percentage, whereas ASTM C836 uses a pass/fail test for extensibility after heat aging without specifying a percentage value.
Key Similarities
≈All standards cover liquid-applied materials that cure in-situ to form a seamless, elastomeric waterproofing layer.
≈Core performance characteristics such as adhesion strength (pull-off), water impermeability, and flexibility (elongation/crack bridging) are fundamental to all listed standards.
≈They all serve the primary purpose of preventing water ingress into a structure by providing a continuous, bonded membrane.
≈The test methodologies for key properties like pull-off adhesion strength and water penetration are conceptually similar, involving applying the membrane to a substrate and then testing it.
Parameter Comparison
Parameter
IS Value
International
Source
Adhesion Strength (Pull-off)
≥ 0.8 N/mm² (MPa) on concrete
≥ 0.5 N/mm² (MPa) under various conditions (initial, water immersion, etc.)
EN 14891:2017
Crack Bridging Ability (Static)
≥ 1.2 mm (Class A) at 27 °C
≥ 0.75 mm (Class CM O2 P) at -20 °C
EN 14891:2017
Elongation at Break
≥ 150%
Often a reported value for classification, but typically >200% for many roofing applications (e.g. per ETAG 005 principles).
ETAG 005
Water Absorption (by mass)
≤ 2.0% (after 24 hrs immersion)
≤ 5.0% (after 24 hrs immersion)
ASTM C836 / C836M - 18
Water Impermeability (under pressure)
No penetration at 0.5 N/mm² (50m head) for 24 hrs
No penetration at 1.5 bar (15m head) for 7 days
EN 14891:2017
Tensile Strength
≥ 0.5 N/mm² (MPa)
Not a primary requirement; focus is on extensibility and adhesion. Some related standards like ETAG 005 have classifications starting from > 2 N/mm².
ASTM C836 / ETAG 005
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
Minimum Tensile Strength1.2 N/mm²
Minimum Elongation at Break150 %
Minimum Adhesion to Concrete1.0 N/mm²
Water Permeability Test Pressure0.1 N/mm² for 24 h with no leakage
Minimum Solid Content60 % by mass
Crack Bridging Capability0.75 mm (Optional Requirement)
Tables & Referenced Sections
Key Tables
Table 1 - Physical Properties of Liquid Membrane
Table 2 - Performance Requirements of Cured Membrane
Table 3 - Optional Requirements
Key Clauses
Clause 4 - Requirements
Clause 4.1 - Physical Properties of Liquid Membrane
Clause 4.2 - Performance Requirements of Cured Membrane
Clause 5 - Tests
Annex A - Method for Determination of Water Permeability