Honeywell PTM7950 - Genuine, In Stock in the UK
PTM7950 is Honeywell's phase change thermal interface material, rated at 8.5 W/mK. It goes on as a solid pad, softens once it reaches operating temperature and flows into a very thin layer between the chip and the cooler, then stays put. Unlike paste it doesn't pump out or dry out over time, which is why it has become the go-to upgrade for laptops, GPUs and consoles.
Which thickness and film?
We stock two genuine PTM7950 variants: a clear-film version at 0.20 mm and a green-film version at 0.25 mm. Both are cut from authentic PTM7950 sheets and perform identically - choose by the gap you need to fill. If you're repasting a laptop CPU or GPU die and aren't sure, 0.25 mm is the safer choice.
How to apply PTM7950
Chill the pad in the freezer for 30 minutes so it's easy to handle. Cut it roughly 0.5 mm larger than the die on each side. Peel one protective film, press that side onto the die and smooth out any air, then peel the second film and reassemble. Temperatures improve over the first few heat cycles as the material burns in.
Frequently asked questions
Is this genuine Honeywell PTM7950?
Yes - we buy full 160×400 mm industrial sheets and cut them in-house. PTM7950 is not sold in retail packaging by Honeywell; anyone offering "retail boxed" PTM7950 is not selling the genuine product. We can photograph the batch label on request.
What size do I need for my laptop or GPU?
Measure the exposed die and cut about 0.5 mm larger on each side - or order a piece slightly bigger and trim it. An 80×40 mm piece covers most laptop CPU and GPU dies with spare material.
Still unsure? Call the shop on 0333 188 5433 — we apply this material daily and can tell you exactly what to order.
Thermify
38 Middlegate, Penrith
Cumbria, CA11 7PT
0333 188 5433
shop@trmfy.co.uk
Mon–Fri 9:30–17:00, Sat 9:00–14:00
Thermify is a trading name of M&J Repairs Ltd, registered in England and Wales, company no. 13584919. Registered office: 25 Park Street, Macclesfield, England, SK11 6SS. VAT no. GB 448 560471. © 2026 M&J Repairs Ltd.