A fire resistant neutral cure silicone for the protection of engineered movement joints in buildings. Conforms to EN1366-3 (penetration seals) and EN1366-4 (linear joints) with an integrity and insulation value in excess of 4 hours for certain joint geometries. Prevents the spread of flame, smoke, toxic gases and water. Halogen free to reduce the risks of toxic fumes and corrosion in the event of fire. It is a neutral curing chemical system suitable for use on concrete, cement, all kinds of metals, timber, glass, ceramics and many plastics. Maintains the integrity of fire walls when breached by conduits, pipes, etc, sealing panels, door frames, partitions, cap beading of protective fire glazing. All the benefits of a silicone rubber sealant, sealing, waterproofing, etc.