The supply deal is worth around €1m for the Ballina-based business.
Four Ár Ocean products will be permanently stocked across Lidl’s 220 stores in Ireland and Northern Ireland. They include a cleanser, moisturiser, eye-cream and face serum.
The collection follows two years of collaboration between Lidl and Ultrapure Laboratories, with the products featuring ingredients such as Irish moss and sea minerals.
Lidl spent €1.6bn last year on goods and services from Irish suppliers
“We worked closely with Lidl to really capture the essence of the brand which shines through with Ár Ocean – naturally sourced, expertly formulated and 100pc Irish,” Ultrapure Laboratories owner John Dempsey said.
He added the range focuses on the “transformative properties” of sea moss and minerals.
“Our ambition for this collection is to provide customers with a quality, premium product at a low cost,” Lidl buyer Emma Nolan said.
“For us, the partnership further demonstrates our commitment to supporting Irish producers, with €1.6bn of goods and services last year coming from Irish suppliers and business partners,” she added.
Around €800m-worth of the total from the agri-food industry in Ireland stayed within Lidl Ireland’s operations, and was sold through its supermarket network across the island of Ireland.
Another €300m-worth was exported internationally to Lidl’s network of stores.
All Lidl employees will get a pay rise of around 6pc in 2024
The retailer has around 1,800 suppliers and business partners in Ireland.
Lidl also invested €500m in services from firms in Ireland last year.
This included work with Structural Design Solutions, a Co Mayo engineering company, as well as with Waterford’s Enerpower.
Enerpower was responsible for the installation and management of rooftop solar across 81 supermarkets, two regional distribution centres and the company’s head office.
Earlier this year, the discount retailer announced that all of its employees would receive a pay rise of around 6pc in 2024.
The company said this was equal to, on average, an additional €2,000 for every employee per year.
This followed a €15m investment for pay rises for its workforce in the Republic of Ireland, while a further £3m was invested in operations in Northern Ireland.