Calling a dab mat a base pad would be a fair estimate. A silicone dab pad is a simple yet effective tool for a variety of purposes especially for concentrates.
Dab Mat; a 101 to What it Is and How to Use  - PlainJane
Ooze Dab Depot 3-in-1 Rolling Tray & Dab Mat Bundle
Trays & Mats – Killer Acid
High Dab Tray Set – Pirate Girl Smoke Boutique
What is a Dab Mat and what are Silicone Dab Mats used for?
Silicone Dab Pads and Mats, Blazy Susan
420 Science Rolling Tray With Magnetic Lid / $ 19.99 at 420 Science
420 Science Rolling Tray With Magnetic Lid / $ 19.99 at 420 Science
Trays & Dab Mats, Backwoods Rolling Tray
Metal Rolling Tray Playground — 3rdi Dab Mats
Trays & Mats – Killer Acid
Dab mat Cannabis Gear Glossary - Atrium Dispensary