---
title: "Thermal Grizzly Introduces PhaseSheet PTM Pro: Phase-Change Thermal Pad for Processors and GPUs"
description: "Thermal Grizzly has released PhaseSheet PTM Pro, a PCM-based thermal pad featuring enhanced thermal conductivity and a new carrier film for simplified installation. The 40×40 mm product is available now for $23.28."
date: 2026-11-04T23:46:13.307Z
lang: en
url: https://xab.info/en/posts/thermal-grizzly-phasesheet-ptm-pro-thermal-pad
tags: [thermal-grizzly, thermal-interface, phase-change-material, cpu-cooling, gpu-cooling, hardware]
author: "Alexander Buran"
publisher: "XAB.info"
---

# Thermal Grizzly Introduces PhaseSheet PTM Pro: Phase-Change Thermal Pad for Processors and GPUs

![Motherboard CPU socket with installed Thermal Grizzly PhaseSheet PTM Pro thermal pad](https://xab.info/media/2026/11/04/thermal-grizzly-phasesheet-ptm-pro-termoprokladka-fazovym-perehodom/thermal-grizzly-phasesheet-ptm-pro-termoprokladka-fazovym-perehodom-1.webp)

## Key Points

- PhaseSheet PTM Pro is an advanced phase-change thermal pad with improved thermal conductivity
- The material is solid at room temperature and transitions to a liquid phase above 45 °C
- A new carrier film simplifies application and reduces the risk of tearing
- Requires a mounting pressure of 300–400 N for optimal distribution
- Available in a 40×40 mm size for $23.28 on the Thermal Grizzly website

Thermal Grizzly Holding GmbH has announced the release of PhaseSheet PTM Pro, an advanced version of its phase change material (PCM) thermal interface. The new product is positioned as an evolution of the PhaseSheet PTM lineup, featuring an optimized chemical composition that delivers enhanced thermal conductivity compared to its predecessor. Designed primarily for cooling central processors and graphics chips, the material's electrically non-conductive properties also allow for its use in other scenarios requiring reliable thermal contact between a die and a heat dissipation system.

### Phase-Change Mechanism: From Solid Sheet to Liquid Coolant

PhaseSheet PTM Pro is a thermally conductive sheet that remains solid at room temperature, simplifying its placement on the chip's contact surface. When heated above 45 °C, the material transitions into a liquid phase with very low viscosity, efficiently dispersing heat on par with traditional thermal pastes. Upon cooling back into a solid state, the material contracts slightly, which the manufacturer states helps maintain a stable contact layer. To ensure optimal distribution of the liquid phase and the formation of the thinnest possible working layer, significant mounting pressure—in the range of 300 to 400 N—is required, which is typical for cooling systems with a massive base and rigid mounting.

### Simplified Application Thanks to a New Carrier Film

A key practical improvement of PhaseSheet PTM Pro over the base version is the new protective carrier film. The protective layer is easily peeled off from both sides of the thermal pad, significantly reducing the risk of accidentally tearing the thermal interface during installation. For the end user and system integrator, this means a more predictable and neat installation process without the need to handle a fragile solid material on a "bare" contact.

### Combating the Pump-Out Effect and Durability

The cyclic phase-change mechanism allows PhaseSheet PTM Pro to effectively resist the so-called pump-out effect. This issue is particularly pronounced in laptops combining a copper cooler with a silicon graphics die, as copper and silicon have different thermal expansion coefficients. In desktop systems under load, the processor IHS and cooler base may deform slightly, bowing outward or inward, and return to their original shape upon cooling, gradually squeezing conventional thermal paste out of the contact zone. PhaseSheet PTM Pro maintains low viscosity in its liquid state and contracts when solidifying, thereby minimizing this effect. The manufacturer emphasizes the product's high durability and thermal conductivity stability over a long service life.

### Specifications, Availability, and Market Context

PhaseSheet PTM Pro in a 40 × 40 mm format is now available to order on the official Thermal Grizzly website for $23.28. By comparison, the base PhaseSheet PTM version released earlier measured 50 × 40 mm and, according to industry publications, reached peak thermal conductivity after approximately ten heating cycles above 60 °C. The new Pro version, judging by its description, retains this "break-in" logic but offers an improved composition and simplified installation. In the thermal interface market, PhaseSheet PTM Pro occupies an intermediate niche between classical pastes and virtually maintenance-free solutions like KryoSheet, offering a balance between ease of use, durability, and thermal conductivity.

## Fact-Check & Sources

- [Thermal Grizzly представила процессорную термопрокладку с фазовым переходом PhaseSheet PTM Pro window-new](https://3dnews.ru/1150849/thermal-grizzly-predstavila-protsessornuyu-termoprokladku-s-fazovim-perehodom-phasesheet-ptm-pro) - Primary source: full description of specifications, phase-change mechanism, pricing, and availability of PhaseSheet PTM Pro.
- [Thermal Grizzly представила термопрокладку PhaseSheet PTM на основе материала с фазовым переходом](https://overclockers.ru/blog/molexandr/show/171117/Thermal-Grizzly-predstavila-termoprokladku-PhaseSheet-PTM-na-osnove-materiala-s-fazovym-perehodom) - Confirms properties of the base PhaseSheet PTM: 50×40 mm, peak thermal conductivity after 10 heating cycles above 60 °C, pump-out minimization.
- [Thermal Grizzly представляет термопрокладку с фазовым переходом PhaseSheet PTM](https://www.playground.ru/misc/news/thermal_grizzly_predstavlyaet_termoprokladku_s_fazovym_perehodom_phasesheet_ptm-1714046) - Confirms positioning between pastes and KryoSheet, description of the phase-change mechanism, and durability.
- [Thermal Grizzly представила термопрокладки PhaseSheet PTM с фазовым переходом](https://overclockers.ru/hardnews/show/135551/thermal-grizzly-predstavila-termoprokladki-phasesheet-ptm-s-fazovym-perehodom) - Подтверждает свойства базовой PhaseSheet PTM: 50×40 мм, пик теплопроводности после 10 циклов нагрева выше 60 °C, минимизация pump-out.

## FAQ

### What is PhaseSheet PTM Pro and how does it differ from regular thermal paste?

PhaseSheet PTM Pro is a phase change material (PCM) thermal pad. Unlike paste, it is solid at room temperature and only transitions to a liquid phase when heated above 45 °C. This simplifies installation and prevents the material from being squeezed out of the contact zone.

### What mounting pressure is required for PhaseSheet PTM Pro?

The manufacturer recommends using cooling systems with a mounting pressure of 300–400 N to ensure optimal liquid phase distribution and form the thinnest possible working layer.

### Where and at what price can I buy PhaseSheet PTM Pro?

The thermal pad in a 40 × 40 mm size is available on the official Thermal Grizzly website for $23.28.

### Is PhaseSheet PTM Pro suitable for laptops?

Yes, the material is electrically non-conductive and versatile. It is suitable for desktop CPUs, GPUs, and laptop chips. However, for laptops, it is crucial to ensure sufficient mounting pressure, which limits compatibility with some compact cooling systems.