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Polyurethane Waterproofing Membrane

HPM-PU Primer is a moisture curing, single pack, liquid polyurethane penetrating waterproofing primer. It is formulated to compliment HPM-PU membrane as it is manufactured from identical resins contained in HPM-PU. As the resins employ cross – link technology the chemical bond between the HPM-PU Primer, HPM-PU is exceptionally strong.

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HPM-Sealtite PRIMER as a primer:

  • Improves the adhesion and performance of the membrane.
  • ‘locks – down’ dust and loose materials.
  • Improves the spreading and application of the subsequent membranes
  • Provides a penetrative secondary waterproof barrier and Improves the coverage of the HPM-PU.
  • HPM-PU Primer is a penetrative sealer and provides a penetrative waterproof barrier when applied in 2 coats or more.


  • Easy to apply - single pack.
  • Dries quickly, with large top coating window.
  • Has good strength, elasticity and penetrative qualities.
  • 100% compatible with HPM-PU
  • Moisture curing polyurethane.
  • Suitable for above ground and below ground applications.
  • Improves the coverage of the HPM-PU
  • Improves easy of membrane application.
  • Suitable for permanent immersion of water.
  • Suitable for use on most porous substrates.


  • Concrete
  • Cement
  • Cement render
  • Brickwork
  • Cement blocks
  • Masonry
  • Timber
  • Fibre cement
  • Plaster sheeting
Data Sheets
technical data sheet

Technical Data Sheet (TDS)

Download technical information for HPM-Sealtite PRIMER

Material Safety data sheet - HPM-Uniflex

Material Safety Data Sheet (MSDS)

Download safety information for HPM-Sealtite PRIMER

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