Home > Companies > Movement Joints (UK) Ltd > Car Parks and Bridge Decks and Watertight MJ CoreSeal/Colour CoreSeal

Watertight pre-formed floor expansion joint seal, composed from low density, durable, closed cell, cross linked ethylene-vinyl acetate (EVA) copolymer foam. For joint widths of up to 300 mm.


  • Unique profile allows for easier install and less tension and compressive force.
  • Accommodates rapid rates of joint movement.
  • Closed cell and impermeable to water, can handle up to 1800 mm head of water pressure.
  • Slip resistant.


Primary horizontal joints, control joints, below grade applications, parking structure expansion joints and joints requiring a watertight seal.

Standard product features


50% (±25%).

Technical properties:

  • Density (to ASTM 3575): 160 kg/m³.
  • Tensile strength (to ASTM 3575): 120 psi.
  • Tensile elongation (to ASTM 3574): 180%.
  • Tear resistance (to ASTM D624): 0.38 kg/mm.
  • Water absorption (to ASTM D624): <8.428 kg/cm².

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-75-90/340 Expanded polyethylene foam profile fillers

Product specification

An important note about specifying



Movement Joints (UK) Ltd


+44 (0)1354 607960

Product reference

[Car Parks and Bridge Decks and Watertight MJ CoreSeal]
Available 13–300 mm in width.
[Car Parks and Bridge Decks and Watertight MJ Colour CoreSeal]
Coloured sealant facing, available 13–100 mm in width.

Joint width

[ ______ ]

Foam colour

Special order.

Sealant facing colour

[ ______ ]

Manufacturer details

Unit 3,
57 Thorby Avenue,
Cambridgeshire, PE15 0AZ
Tel +44 (0)1354 607960
Fax +44 (0)1354 607833
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