Semlos Heat Blocking Putty Jar (12 oz) – Moldable, Reusable Heat Insulation Clay for Soldering & Valve Installations

Overview

Semlos Heat Blocking Putty Jar is a moldable, reusable insulation clay designed for high-heat tasks around sight glasses, TXV valves, and directional valves. Its natural, non-toxic composition aims to keep heat where you want it and away from sensitive components, helping you work with more confidence.

Key benefits

• Safe and reliable: made from a non-toxic hydrogel-ceramic composite with silicon, aluminum, and sodium; free from harmful additives.
• Superior thermal insulation: withstands temperatures up to 3000°C to limit heat transfer during soldering, brazing, or welding.
• Shapeable and reusable: pliable and adherent, reusable for up to a year; resists drying and cracking compared to other clays.
• Multi-purpose: suitable for protecting sight glasses, TXV valves, directional valves, liquid line driers, ball valves and fixtures.
• Easy to handle: free-flowing but drip-free, mess-free, and easy to remove for repeated use.

Real-life use cases

In a busy workshop, technicians apply Semlos Putty around sight glass connections to guard nearby components from heat during soldering. It stays pliable as components cool, then cleans up with a quick wipe.

When installing TXV or directional valves, the putty protects adjacent surfaces, enabling precise work without overheating critical parts. The material remains intact through multiple sessions, saving time on replacements.

What you can expect

• Potential benefits include improved heat control, reduced risk of heat damage, and cleaner, faster installations.
• Not a guaranteed outcome but a possible aid depending on your setup and technique.

Storage and care are straightforward: keep the putty in a cool, dry place when not in use and seal the container to preserve pliability for future sessions.

Each 12 oz jar provides ample material for multiple projects. The blend is designed to stay pliable through repeated sessions, reducing the need for frequent replacements and mess—ideal for busy teams seeking reliable, reusable insulation.