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IS 12053:1987 is the Indian Standard (BIS) for the preparation and application of putty for repairing plywood and other wood-based panels. This code of practice details the methods for preparing and applying putty to repair surface defects like cracks, holes, and open knots in plywood and other wood-based panels. It covers the selection of materials, preparation of the wood surface, mixing and application of the putty, and subsequent finishing operations like sanding.
Code of practice for the preparation and application of putty for repairing plywood and other wood-based panels
Overview
Status
Current
Usage level
Specialized
Domain
Materials Science — Wood and Other Lignocellulosic Products
JIS A 5752:2015JSA (Japanese Standards Association), Japan
HighCurrent
Putty for building
Specifies quality requirements and test methods for various building putties, including types suitable for wood.
BS 8000-7:1990BSI (British Standards Institution), UK
MediumCurrent
Workmanship on building sites. Code of practice for glazing
A code of practice detailing workmanship for applying putty, focusing on glazing but sharing principles of surface preparation and application.
BS 544:1969BSI (British Standards Institution), UK
LowWithdrawn
Specification for linseed oil putty for use in wooden frames
Provided a compositional and performance specification for traditional linseed oil putty, similar to IS 12053's Type 1 putty.
ASTM D3359 - 17ASTM International, USA
LowCurrent
Standard Test Methods for Rating Adhesion by Tape Test
Provides a standardized test method for adhesion, a key performance parameter for putty, which is tested more qualitatively in the IS code.
Key Differences
≠The IS code is highly specific to repairing plywood and wood-based panels, whereas international standards are often broader (e.g., 'putty for building') or are test-method specific.
≠IS 12053 is prescriptive, suggesting compositions for putty (e.g., Type 1 with whiting and linseed oil). Modern international practice is overwhelmingly performance-based, allowing any formulation that meets specified performance criteria.
≠The Indian standard focuses on traditional putty types. International standards and market practices cover a wider range of modern materials like two-part epoxy, polyester, and acrylic fillers, which offer faster curing and lower shrinkage.
≠IS 12053 combines material specification, application practice, and testing in one document. Internationally, these aspects are often separated into different standards for materials, test methods, and codes of workmanship.
Key Similarities
≈The fundamental goal is identical: to create a smooth, durable repair of surface defects on a substrate to prepare it for subsequent finishing (e.g., painting or veneering).
≈Core performance metrics like consistency (workability), drying time, hardness, and adhesion are key requirements in both the IS code and related international standards.
≈The principle of surface preparation is a shared, crucial step. Both IS 12053 and international best practices mandate that the defect area must be clean, dry, and free of loose material before applying putty.
≈The basic application methodology of forcing the material into the defect to ensure full contact and then smoothing it flush with the surrounding surface is a universal technique.
Parameter Comparison
Parameter
IS Value
International
Source
Drying Time
Shall be hard dry in not more than 24 hours.
Varies by type. For oil putty (Type 1), 'set-to-touch' time is ≤ 24 hours. For resin putties, it can be as low as 1-3 hours.
JIS A 5752:2015
Hardness Test
Qualitative: No visible mark from a 1kg loaded steel ball after 72h drying.
Quantitative: Uses a durometer (e.g., Shore D) to measure indentation hardness after a specified cure time. A specific value is required (e.g., >70 Shore D).
JIS A 5752:2015
Adhesion Test
Qualitative: Shall not show flaking or peeling when lifted at the edge with a penknife.
Quantitative: A bond strength test is specified, where putty between two test pieces is pulled apart, requiring a minimum strength (e.g., > 0.5 N/mm²).
JIS A 5752:2015
Putty Composition
Prescriptive for Type 1 (whiting, linseed oil, varnish) and class-based for Type 2 (synthetic resin).
Performance-based. Standards classify by binder (e.g., oil, lacquer, resin) but do not mandate specific formulations, focusing instead on performance results.
JIS A 5752:2015
Consistency Test
Slump test using a specified cone and plate; slump must be 5 to 15 mm.
A flow test using a specific ring or viscosity measurement is used, with acceptable ranges defined for each putty type.
JIS A 5752:2015
Keeping Quality / Shelf Life
The material shall meet requirements for at least 6 months from manufacture.
No specific value in general standards; this is typically defined by the manufacturer on the product data sheet (commonly 12-24 months).
General Industry Practice
⚠ Verify details from original standards before use
Key Values4
Quick Reference Values
Recommended defect size for fillingCracks up to 3 mm wide and holes up to 10 mm diameter
Pot life of mixed two-component putty (typical)15 to 30 minutes
Minimum drying time before sanding4 to 6 hours at room temperature
Sanding paper grit for finishingStart with 120, finish with 220 or finer