UK leader in Construction Chemicals


New Tunnels

PAREX provides a range of high performance caulking and repair materials for sealing and making good precast tunnel segments.

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Caulking Segments

Industry standard caulking material for improving the water-resistance of joints between precast tunnel sections. Formulated for easy mixing and use at the tunnel face.

Segment Repair

High quality purpose-designed materials for all types of repair applications ranging from wide gaps to fine cracks in old or damaged sections.

Water Stopping

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Wedge Block Infill

High strength void-filling caulking material for the grouting of wedge blocks following placement during tunnel construction.


Arthur McNiven

Arthur McNiven

Pointing Sector Specialist

01257 224900