Kestral Construction Products Ltd.

Joint Fillers

Polyethylene Foam Joint Cord

Closed cell low density (33kg/m3) polyethylene foam cord. Used behind sealants and mastics in expansion joints. Size: varying diameter cords from 6mm to 50mm larger sizes run on request.

Low Density Polyethylene Foam Joint Filler

High performance joint filler used for brickwork and blockwork. Ideal for expansion and isolation joints in concrete slab construction therefore specified in the construction of hard standing, factories, warehouses, community and commercial buildings, airports and military bases. Pre-cut strips any width.

  • Fine Cell - Low density (33kg/m3) cross linked
  • Medium Cell - low density (33kg/m3) chemically crossed linked
  • Course Cell - Low density (33kg/m3) non-crossed linked

High Density Polyethylene Foam Joint Filler

Potable Water Grade fine cell, high density (60-70kg/m3) crosslinked closed cell PE foam joint filler. Used for most water retaining & excluding structures such as water treatments, sea defences, reservoirs and canals. Used in roads, airfields, bridges and basement structures. Suitable for use with potable water. Pre-cut strips any width.

Fire Resistant Polyethylene Foam

Fire resistant closed cell expanded polyethylene foam. Recommended for use in isolation joints between concrete slab and walls, around columns, and in brickwork expansion joints where fire resistance is a critical factor. Thickness 10mm-50mm. Other sizes are to order. Pre-cut strips available


Compressible non-extruding bitumen impregnated fibreboard. Used for forming structural expansion and separation joints in concrete pavements and floors, roads ramps and runways, concrete retaining walls, concrete basement structures and subways. Thickness 10mm-25mm. Sheet Size 1.22 mtr x 2.44 mtr or pre-cut strips available.

Resin Bonded Cork

Cork granules bound together with synthetic resin. This material contains no bitumen or similar compounds and will not contaminate joint faces. Recommended use as a joint filler for expansion joints in re-inforced concrete water retaining structures ie. sewage treatment works, swimming pools, sea walls and similar structures.

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