Glaziers’ putty – composition, use, and handling in building works What is correctly stated about traditional putty used around window glass panes?

Introduction:
Putty, especially traditional glaziers’ putty, remains a practical material for bedding and sealing glass panes. Understanding its composition and handling ensures durable, weather-tight glazing in doors, windows, and skylights.

Given Data / Assumptions:

• Composition refers to classic putty, not modern polymer mastics.
• “Softened” means reconditioning for removal or rework, not daily service.

Concept / Approach:

Classic putty is a plastic sealant produced by mixing whiting (finely ground chalk/calcium carbonate) with linseed oil to a doughy consistency. It cures by slow oxidation of the oil, forming a firm yet slightly flexible seal around glass edges.

Step-by-Step Solution:

Verification / Alternative check:

Traditional building practice and conservation handbooks consistently specify chalk + linseed oil recipes, with rework methods using controlled softening or mechanical removal where needed.

Why Other Options Are Wrong:

Each of the first three statements is correct in the traditional context. Therefore, the combined statement “All of the above” is the right choice.

Common Pitfalls:

Confusing modern acrylic/silicone mastics with classic putty; applying paint too soon before oxidation cure; or neglecting proper bevel for water shed, which shortens service life.

Final Answer:

All of the above