The Waterproofing Specialist

Joint Sealants

Product Name Description
SpECseal PU25 -
One part polyurethane,
low modulus construction

SpECseal PU25
SpECseal PU25 is a one component, moisture curing, polyurethane construction sealant. The product has been formulated to offer a non-slump elastomeric sealant, which exhibits good skin formation time and fast cure.

Typical Uses
SpECseal PU25 may be used for bonding and sealing most common building materials including concrete, wood, lacquered metal, anodized aluminum and glass. SpECseal PU25 has high elasticity, excellent recovery and tear resistance and good weather ability.
  • Tough resilient seal.
  • No primer required.
  • Non staining.
  • Bedding tiles.
  • Good resistance to dilute acids and alkalis Available in range of colours.
SpECseal 625 -
Two part, polysulphide civil
engineering & construction

SpECseal 625
SpECseal 625 is a two part, polysulphide civil engineering and construction sealant. The product has been formulated to seal and reseal high movement joints in building and civil engineering structures and for the sealing of joints subject to rapid movement.

The sealant cures through a chemical reaction and is capable of accommodating cyclic movement during the curing process. SpECseal 625 will bond to most building substrates including concrete, brick, stone, wood and mill finished aluminum. Primers are available for most types of substrates.

The sealant possesses excellent application and tooling characteristics which results in achieving a high standard of finish.

Principle Application
For sealing and resealing high movement joints in building and civil engineering structures and for sealing joints in structures which are subject to high rapid movements.
  • Tough and resilient seal.
  • High early movement accommodation.
  • Excellent application characteristics.
  • Predictable cure time.
  • Good slump resistance.
  • Pouring and gun grades for horizontal, vertical and overhead application.
  • Good chemical resistance.
  • Non-toxic once cured.
SpECseal Primer 25
One or two part primer
for polysulphide sealant system

SpECseal Primer 25
SpECseal Primer 25 is a one or two component, moisture curing

SpECcord -
Closed cell polyethylene Backer Rod

SpECcord is closed cell polyethylene foam supplied in cord form for use as a back-up material for joint sealants. It is available in diameters from 6mm to 50mm

Typical uses
Joint sealant back-up cord in concrete and brickwork designed joints where cold applied sealant is used.

  • Economical.
  • Easy to install.
  • Excellent absorption & chemical resistance.
  • Provides a bond breaker function and minimum strain shape for joint sealants.
  • Not impaired by climatic extremes.
SpECcell Polyethylene -
Closed cell joint filler board

SpECcell Polyethylene is semi-rigid, U.V. resistant, high performance closed cell polyethylene foam joint filler in sheet form. It is suitable for use as expansion joint filler in concrete, brick, block-work and isolation joints, where readily compressible low load transfer joint filler is required. SpECcell Polyethylene is non-tainting and therefore suitable for use in potable water retaining and water excluding structures.

Principle Application
SpECcell Polyethylene may be used in the following applications:

  • Structural expansion joints in concrete, brick and block-work.
  • Isolation joints to infill panels.
  • Bridge joints, abutments, pier hinge joints.
  • As a back-up support for sealants.
  • As a back-up support for sealants.
  • Anti-vibration pads for machinery bases.
SpECcell Polyethylene meets the following requirements:
  • Completely fills the joints under repeated cycles of expansion and contraction.
  • Resistant to moisture penetration and ice formation in the joint.
  • Will not support dry or wet rot, fungus attack or similar forms of deteriorating agents.
  • Non-taint.
  • Cross-laminated to resist lateral and hydrostatic pressure.
  • Natural bond breaker.
  • Low load transfer to joint edges under compression
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