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CrystalSeal is a crystal clear, high modulus, single component, moisture-curing, adhesive and sealant based on Hy-Spec hybrid technology.

It offers outstanding performance across a wide variety of industrial applications. It has excellent adhesion to glass, timber, metals, brickwork, most plastics and concrete and does not normally require a primer.


  • Crystal Clear Formulation
  • Premium quality high modulus adhesive and sealant
  • Excellent adhesion to PVC-U, coated metals, brickwork, polycarbonate, coated timber and glass
  • Neutral system, free from isocyanates and silicones
  • Adhesive sealing and jointing to most substrates
  • Non-staining, odour free and bubble free curing
  • Permanent elastic sealing with a high adhesive strength to a wide variety of substrates including wood, concrete, tiles, steel, aluminium, zinc, copper, brass, stainless steel, glass, polyester
  • Good movement accommodation
  • Highly resistant to ageing and weathering
  • Resistant to water, salt water, grease oils, fuels, defrosting liquids, detergents, aliphatic fats, mildew, weak acids and alkali


Application temperature range: +5°C to +30°C

Shelf life: 18 months in original unopened packaging at temperatures of +5°C to +25°C.

Skinning time: Skin forms after approximately 25 minutes.

Working time: Approximately <25 minutes depending on conditions.


Joint design: Please consult the Technical Information Sheet entitled ‘Joint design for cartridge-based products’ prior to application.

Surface preparation: All surfaces must be clean, dry and free from frost, grease and loose materials. Apply primer if required. Install bond breaker to prevent bond at the base of joint where necessary. Most substrates only require priming if testing indicates a need or where sealant will be subjected to water immersion after cure. Cut the top of the screw thread off the cartridge and screw on the nozzle. Cut nozzle to correct diameter for joint size. Apply using a skeleton or powered gun into the joint ensuring good contact with surfaces. In deep joints, the use of Hodgson Backing Rod is essential to ensure good joint formation. In situations where an especially neat finish is required, use masking tape to cover the face edges of the joint and remove immediately once tooling has been completed.