Functions of Heat Blocking Putty:
1. Protects Sensitive Components from Torch Heat
• Heat blocking putty works like gel, but in a solid/sticky clay-like form.
• When shaped and applied around pipes or valves, it absorbs and blocks heat from spreading to nearby components.
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2. Suitable for Small & Tight Areas
• The putty is easy to mold according to the shape of pipes or fittings, for example:
• Copper pipes near the compressor
• Valves near the evaporator
• Service ports or schrader valves
• Doesn’t drip like gel when heated – neater for tight spaces.
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3. Reusable
• After brazing work is done, the putty can be removed and stored back in its container.
• Cost-saving since it can be reused multiple times if kept clean.
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4. High Temperature Resistance
• Typically withstands up to 2000°F / 1093°C – suitable for copper brazing work.
• Doesn’t melt, drip, or produce smoke.
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How to Use Heat Blocking Putty:
1. Take a small amount of putty (like clay).
2. Press & wrap it around the area to be protected (e.g., near a valve or fitting).
3. Ensure it adheres tightly with enough thickness (1–2 cm).
4. Carry out brazing work as usual.
5. Once finished and cooled, remove the putty, wipe clean, and store it again.
Extra Tips:
• Store in an airtight container after use – don’t let it dry out.
• Don’t reuse putty that has been contaminated with oil, gas, or dirt – it may lose effectiveness.
• Avoid touching it while it’s still very hot – let it cool first.
