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Structural Waterproofing - FAQs

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Procor® Liquid Waterproofing Questions

Preprufe® Questions

Bituthene® Membrane Questions

Hydroduct® Drainage Questions

Where should Procor® be used?

Procor® is intended for use as either a below grade and deck waterproofing material (with separate protection course), or as an above-grade air and vapor barrier.

Can Procor® be applied to green or damp concrete?

Procor® waterproofing membranes may be applied onto "green" concrete or over damp substrates. Remove any visible water prior to application. Once applied, Procor® membranes will not be affected by light rain showers.

Can Procor® be used for indoor waterproofing applications?

Procor® membranes are water-based and virtually odorless. This makes them ideally suited for interior applications such as kitchens, mechanical rooms, bathrooms, laboratories, and wet rooms. Procor® membranes are also appropriate for use in planters and other jobs where the use of solvents is restricted.


Is Procor® compatible with spray applied polyurethane foam insulation?

Spray polyurethane foam insulation is compatible with Procor® membranes. It will adhere to Procor® when used as an exterior insulation in air and vapor barrier applications. Procor® membranes adhere well to cured polyurethane foam insulation.

How are Procor® membranes applied?

Procor® 75 is a spray application material. Procor® 10 & 20 are applied by trowel. Procor® may not be applied by brush, roller or rubber squeegee.

How do Preprufe® membranes bond to concrete?

An exceptionally strong mechanical bond develops between Preprufe® membranes and freshly poured concrete. The liquid concrete becomes interlocked with the specially formulated adhesive layers of the Preprufe® membrane. The bond develops and increases in strength as the concrete cures.


Will Shotcrete bond with Preprufe® membranes?

Yes, Shotcrete bonds extremely well to Preprufe® membranes.

Can the release liner be left on the Preprufe® membrane to protect it during construction?

No. The release liner should be removed during application. Preprufe® membranes are designed to take reasonable construction site abuse and it is difficult to remove release liner once steel has been placed.

When should I use Preprufe® 160R membrane?

Preprufe® 160R is designed for vertical "blind-side" wall applications such as against timber lagging or sheet piling and is installed against a properly prepared substrate prior to concrete placement.


When should I use Preprufe® 300R membrane?

Preprufe® 300R is designed for horizontal sub slab or split slab applications. The membrane is applied directly to compacted earth or a mud slab and concrete is subsequently placed directly against the membrane.

Can Bituthene® membranes be used as a roof underlayment on a steep sloped roof?

No. Bituthene® membranes are not designed to withstand the high temperatures that a roof underlayment product is exposed to. Grace Ice & Water Shield® roof leak protection is specifically designed to meet the demands of this application.

What protection courses should be used with Bituthene® membranes?

Protection of Bituthene® 3000 and Bituthene® Low Temperature Membranes from site damage is critical to the success of the waterproofing system. Recommended protection courses for use over Bituthene® membranes include Hydroduct® drainage composites, 3 mm (0.125 in.) or 6 mm (0.25 in.) Asphaltic Hardboard, 25 mm (1 in.) expanded polystyrene board (vertical applications only), or 6 mm (0.25 in.) extruded polystyrene fanfold board (vertical applications only). Bituthene® 5000 does not require a protection course prior to placement of asphalt concrete.


What is the application temperature range for Bituthene® membranes?

Bituthene® membranes are designed to be installed within specific application temperature ranges as given below:

  • Bituthene® 2000, 3000, 5000, 6000 and 8000: 5°C and above
  • Bituthene® Low Temperature Membrane: -4°C to 18°C

How long does freshly poured concrete need to cure prior to installing Bituthene® membranes?

A minimum cure period of 7 days for normal weight structural concrete and 14 days for light weight structural concrete is recommended prior to installing Bituthene® membranes. Primer B2 may be used when there is a need to install membrane over green concrete.


How long can Bituthene® membranes be left exposed to the elements?

Bituthene® membranes are subject to damage from heat and sunlight and should be covered as soon as possible. Protection should be applied the same day the membrane is applied or immediately after the 24 hour flood test.

What is the roll size of Bituthene® membranes?

Bituthene® 3000, 5000, 6000 and 8000 membranes are sold in rolls that are 1m x 20m. Bituthene® 2000 rolls are 1m x 30m.

How long do primers used with Bituthene® membranes take to dry?

Primer B2 will dry in one hour in cold applications and can also be used on damp surfaces or green concrete.


What is the appropriate Hydroduct® drainage composite for use over waterproofing membranes?

Hydroduct® 220 should be used with waterproofing membranes in vertical applications and Hydroduct® 650 in horizontal applications.

Do Hydroduct® drainage composites provide adequate protection for waterproofing membranes?

Hydroduct® drainage composites with an integral backing film provide exceptional drainage capabilities and also provide protection for all waterproofing membranes.


How is Hydroduct® 220 fastened to Bituthene® and Procor® membranes in vertical applications?

Bitustik Tape, a highly aggressive two sided tape, is used to adhere the Hydroduct® 220 drainage composites to Bituthene® membranes. Since Procor® fluid applied membranes are tacky, the drainage composite can be installed over Procor® without an adhesive.

Can concrete be placed directly over Hydroduct® drainage composites?

Yes, fresh concrete can be placed directly over Hydroduct® 650 drainage composite.