Similar International Standards
EN 204:2016CEN (European Committee for Standardization), Europe
HighCurrent
Classification of non-structural adhesives for joining of wood and derived timber products
Covers PVA-based adhesives for non-structural wood bonding, but classifies them by durability (D1-D4) rather than providing a single specification.
ASTM D4317-19ASTM International, USA
HighCurrent
Standard Specification for Polyvinyl Acetate-Based Emulsion Adhesives
Directly specifies requirements for general-purpose PVA emulsion adhesives for wood, similar in intent to IS 4835.
BS 4071:1966BSI (British Standards Institution), UK
HighWithdrawn
Specification for polyvinyl acetate (PVA) emulsion adhesives for wood
A historical equivalent, providing a specification for PVA wood adhesives before the adoption of the European classification system.
ISO 16556:2012ISO (International Organization for Standardization), International
LowCurrent
Adhesives — End-use application of adhesives — Guidelines for the selection of a standard laboratory ageing condition for testing bonded joints
This is not a product specification, but a guideline for selecting test conditions, which is relevant for comparing the performance tests in IS 4835.
Key Differences
≠IS 4835 is a single-grade specification, meaning an adhesive either passes or fails. In contrast, EN 204 is a classification standard that categorizes adhesives into four durability classes (D1, D2, D3, D4) based on their resistance to moisture and water, allowing for a wider range of performance levels.
≠Modern standards like EN 204 and ASTM D4317 often require higher bond strength values than the 1979 Indian Standard. For example, the minimum dry shear strength in EN 204 is 10 MPa, whereas in IS 4835 it is 7 MPa.
≠Test methodologies, particularly for water resistance, have evolved. IS 4835 specifies a simple 3-hour cold water soak. EN 204 uses a more extensive and demanding series of water-soaking and conditioning cycles, especially for the higher durability classes (D3 and D4).
≠EN 204 focuses almost exclusively on bond performance (strength under various conditions) and does not specify the adhesive's chemical or physical properties like solids content or pH, leaving these to the manufacturer. IS 4835 and ASTM D4317 specify limits for these properties.
Key Similarities
≈All standards are fundamentally intended for polyvinyl acetate (PVA) dispersion-based adhesives used for non-structural bonding of wood and cellulosic materials.
≈The primary performance evaluation in all relevant standards (IS 4835, EN 205 for EN 204, ASTM D906) is based on a lap-shear strength test using wood specimens (typically beech).
≈All standards include a requirement for minimum bond strength under dry, ambient conditions as a baseline for adhesive quality and performance.
≈Both IS 4835 and ASTM D4317, being specification standards, define requirements for basic physical properties like pH, solids content, and viscosity for quality control purposes.