Preprufe® 300R Plus and 160R Plus

Pre-applied waterproofing membranes that bond integrally to poured concrete for use below slabs or behind basement walls on confined sites.


Preprufe® 300R Plus & 160R Plus membranes are unique composite sheets comprising, a thick HDPE film, an aggressive pressure sensitive adhesive a weather resistant protective coating and an adhesive to adhesive seam overlap. Unlike conventional non-adhering membranes, which are vulnerable to water ingress tracking between the
unbonded membrane and structure, the unique Preprufe bond to concrete prevents ingress or migration of water around the structure.

The Preprufe R Plus System includes:

  • Preprufe 300R Plus—heavy-duty grade for use below slabs and on rafts (i.e. mud slabs). Designed to accept the placing of heavy reinforcement using conventional concrete spacers.
  • Preprufe 160R Plus—thinner grade for blindside, zero property line applications against soil retention systems.
  • Preprufe Tape LT—for covering cut edges, roll ends, penetrations and detailing (temperatures between 25°F (-4°C) and 86°F (+30°C)).
  • Preprufe Tape HC—as above for use in Hot Climates (minimum 50°F (10°C)).
  • Bituthene® Liquid Membrane—for sealing around penetrations, etc.
  • Adcor™ ES—waterstop for joints in concrete walls and floors
  • Preprufe Tieback Covers—preformed cover for soil retention wall tieback heads
  • Preprufe Preformed Corners—preformed inside and outside corners
Preprufe 300R Plus & 160R Plus membranes are applied either horizontally to smooth prepared concrete, carton forms or well rolled and compacted earth or crushed stone substrate; or vertically to permanent formwork or adjoining structures. Concrete is then cast directly against the adhesive side of the membranes. The specially developed Preprufe adhesive layers work together to form a continuous and integral seal to the structure. Preprufe can be turned up the inside face of slab formwork but is not recommended for conventional twin-sided formwork on walls, etc. Use Bituthene® self-adhesive membrane or Procor® fluid applied membrane to walls after removal of formwork for a fully bonded system to all structural surfaces.


  • Forms a unique continuous adhesive bond to concrete poured against it—prevents water migration and makes it unaffected by ground settlement beneath slabs
  • Fully-adhered adhesive to adhesive watertight laps and detailing
  • Provides a barrier to water, moisture and gas—physically isolates the structure from the surrounding ground
  • Easy roll/kick out installation—reduces installation time and cost 
  • Release Liner free—expedites installation and reduces construction site waste
  • Solar reflective—reduced temperature gain
  • Simple and quick to install—requiring no primingor fillets 
  • Can be applied to permanent formwork—allows maximum use of confined sites
  • Self protecting—can be trafficked immediately after application and ready for immediate placing of reinforcement
  • Unaffected by wet conditions—cannot activate prematurely
  • Inherently waterproof, non-reactive system:
  • not reliant on confining pressures or hydration
  • unaffected by freeze/thaw, wet/dry cycling
  • Chemical resistant—effective in most types of soils and waters, protects structure from salt or sulphate attack