Waterproofing

Orlando – October 16, 2026 -- A crystalline waterproofing admixture removed roughly 60 days of planned waterproofing work from the rehabilitation of the Dujmovača Tunnel in Split, Croatia, and cut water penetration depth by 83% after ten test cycles, according to Penetron Group.

Redesign followed material shortage and failed adhesion tests

The Dujmovača Tunnel (M604) is part of the Split suburban railway line and is one of two railway tunnels beneath the city center. The rehabilitation targeted waterproofing and drainage to control water ingress. The original design specified a dimpled membrane system to channel inflows through drains and half-pipes into a drainage channel.

Two problems forced a rethink. The specified composite drainage material was no longer available, and shotcrete adhesion tests returned values below the required threshold, said Theodor Mentzikofakis, Managing Director and Partner of Penetron Hellas.

Jeddah – October 14, 2026 -- The rooftop pool at the Hilton Garden Inn in Jeddah, Saudi Arabia, passed post-commissioning testing with walls on the floor below found almost entirely dry and no leakage detected beneath the slab, according to The Penetron Group. PENETRON ADMIX performed as a standalone waterproofing system, with no membrane required.

Penetron Middle East specified three integrated systems for the pool structure

The brief called for protecting the below-grade concrete structures and delivering a pool that stays watertight for the life of the building without a surface membrane, said Sam Annous, Director and Partner of Penetron Middle East. The team specified an integral approach combining three product groups: