Vermiculite Board - 25mm thickness. Overall size 500mm x 610mm x 25mm. Micalite Fire/Heat Resistant Vermiculite Board. High Quality board, smooth and durable. Non combustible and fire resistant vermiculite board. Easily cut to shape. Excellent thermal insulation properties and minimal shrinkage at high temperatures. Ideal products to use in the construction of fire bricks for wood burning/multifuel stoves, lining of a fireplace/ingelnook opening, lining of pizza ovens etc. among other applications, providing fire protection exactly where its needed. The boards are tested to withstand temperatures of up to 1100 degrees C.