Car Builders Under Bonnet Insulation is constructed from a open cell acoustic foam, our Under Bonnet Insulation is dark grey in colour with a black protective top layer. The black top layer is a unique flexible polyurethane coating which allows the material to conform effectively on irregular surfaces with minimal creasing. The top layer is also a protective coating sealing the material from liquids, allowing for ease of cleaning Peel and stick Open cell foam is great for sound dampening Flexible in all directions and will not crease easily like traditional woven face material foam. Shipped in protective packaging, with guaranteed delivery of quality product not creased or damaged