Woodburner Chimney Seal Dektite Roof Flashing - High Temperature - 121mm-254mm Silicone Flue Pipe Seal Please adhere to building regulations or consult a qualified professional for suitability and specific installation guidance. Flexible Chimney Flue Liner - 150mm (6 inch) 316 Grade - Flexible Flue... These are professional building products used industry wide. Dektite Roof Flashing High Temp - Type 6 - Ducting & Ventilation Base size: 121-254mm (304mm x 304mm) Manufactured from silicone based rubber with an aluminium strip base which can be shaped to suit roof profile Roof Flashing is used to weather proof the penetration of chimney pipe through the roof. A storm collar is required (not included Product description Manufactured from silicone based rubber with an aluminium strip base which can be shaped to suit roof profile. Actual appearance/scale of product may vary dependant on size. Full specification on request.