What kind of putty does this code cover?

It primarily covers two-component synthetic resin-based putties (e.g., polyester, epoxy) suitable for wood panels.

How should the surface be prepared before applying putty?

The defective area must be cleaned of all loose particles, dust, and grease, and must be completely dry (Clause 6).

Is this putty for structural repairs?

No, this code is for cosmetic, non-structural repairs to improve the surface appearance and prepare it for finishing.

What is the procedure after the putty has dried?

The filled area should be sanded smooth, flush with the surrounding surface, using progressively finer grades of sandpaper (Clause 8).

IS 12053

: 1987

Code of practice for the preparation and application of putty for repairing plywood and other wood-based panels

CurrentSpecializedCode of PracticeMaterials Science · Wood and Other Lignocellulosic Products

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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

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

Practical Notes

Ensure the surface is completely clean, dry, and free from dust or grease for proper adhesion of the putty.

For deeper defects, apply putty in thin successive layers, allowing each layer to dry, to prevent shrinkage and cracking.

Select a putty with a colour that closely matches the wood species or the intended final stain/paint finish to ensure a seamless repair.