Roxtec has been selected to supply four onshore wind farm projects for ScottishPower Renewables.
Managing Director Graham O'Hare said the latest agreement reinforces the firm’s position as one of the key components in the wind farm sector.
The deal will see Swedish-owned Roxtec supply a wind farm upgrade in Arecleoch, in South Ayrshire, Scotland.
It will also provide for three, new-build wind farms in Middleton, near Newton Mearns, Harestanes, near Moffat and Carland Cross, Cornwall.
"We are very pleased to win this work," he said. "Roxtec is now becoming the industry standard for sealing cables in the windfarm sector. Roxtec seals the cables in the cable trench that connects the wind farm array cables to the substation.
"For Carland Cross, Arecleogh and Middleton we are supplying our H3 trefoil seals which are specialist substation seals. They are meticulously designed to seal 150mm ducts and tested to be strong enough to carry the weight of the high voltage single core cables at the point they enter the substation – which transports power to the national grid."
Mr O'Hare said effective sealing of 33kV substations was important to protect them from leakage and humidity.
"Roxtec has a problem-solving ethos," he said. "Humidity is a big issue in substations and can be a very disruptive and expensive problem. Our seals work by allowing several cables to be sealed at one point of the substation wall.
"This immediately reduces the risk of water leakage, known as ingress, because by reducing the number of entry points required for the cables you also reduce the potential leak points."