ASEC 255mm Intumescent Letter Plate

With an ABS plastic frame and metal flap, these stylish letter boxes from Asec are fully tested and certified in regards to fire and smoke applications. They are fitted with a high performance intumescent liner, which expands when heated, helping to protect door furniture and prevent the spread of fire. Additionally, the letter plate is available in different colours and sizes and also features an internal draught excluder and external weatherseal.


  • Intumescent seal expands when heated to help secure door furniture and prevent the spread of fire
  • Fully fire and smoke tested
  • Internal draught excluder
  • External weather seal
  • Stylish design
  • A variety of finishes and sizes available