TL-0004 — Chemical Resistance Technical Letter

Several series of tests have been conducted to define the chemical resistance of PREPRUFE® and BITUTHENE® waterproofing membranes. Both PREPRUFE® and BITUTHENE® membranes are highly resistant to normal ground water conditions which range from alkaline to acidic. In addition, PREPRUFE® and BITUTHENE® waterproofing membranes are unaffected by exposure to salt water.

Occasionally PREPRUFE® and BITUTHENE® membranes may be used in applications which will be subjected to intermittent or even continuous exposure to chemicals. The following guidelines can be used to evaluate the applicability of the PREPRUFE® and BITUTHENE® membrane system.

NOTE: Most solvents and fuels will not significantly a?ect polyethylene film but may soften or dissolve the adhesive compounds exposed at the edge laps of BITUTHENE® membranes. Detailed information on the type of exposure is necessary to make recommendations.

For below slab and blind side applications, a concrete mud-slab or continuous soil retention system will reduce the exposure of the PREPRUFE® membrane laps. For BITUTHENE® membrane wall
applications, the use of a solvent resistant tape, should be used over the membrane edges to protect the rubberized asphalt from prolonged exposure.

Exposure Conditions PREPRUFE® and BITUTHENE® Membrane Resistance Rating
Sea water, de-icing salt Excellent
Acids in solution
e.g. sulfuric, acetic, hydrochloric and nitric acid
Excellent
Alkalis
e.g. Sodium hydroxide, ammonium hydroxide
Excellent
Alcohols Very Good
Organic or fuel oils, solvents Variable (See note.)

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This document is only current as of the last updated date stated below and is valid only for use in the Canada. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on www.gcpat.com. Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.

Last Updated: 2021-02-22

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