BUILDING ENVELOPE | WATERPROOFING & SEALANTS
SHEET APPLIED WATERPROOFING
Underseal® PRM
Polyguard Products
Underseal® PRM™ is a strong, self-adhering, 65 mil, post-concrete pour sheet waterproofing membrane/vapor retarder with a double thick, high-strength, cross-laminated polyethylene backing laminated to a thick layer of rubberized asphalt compound. Underseal® PRM™ adheres tightly and permanently to concrete and the backing forms a continuous barrier to water and moisture vapor entry. Underseal® PRM™ can be used in both horizontal and vertical applications.
Underseal® Blindside Membrane Underseal® Blindside™ Membrane is a 73 mil, pre-concrete pour, strong sheet membrane waterproofing with a thick, cross-laminated, high-density polyethylene (HDPE) backing, laminated to a thick layer of proprietary waterproofing adhesive compound integrated into a nonwoven geotextile fabric. Underseal® Blindside™ Membrane is used as a waterproofing membrane where vertical, positive-side waterproofing is required, but access to the positive side is impossible due to the soil retention system. Once the concrete is poured against the Blindside™ membrane, the concrete cures and a mechanical bond forms to secure the concrete to the membrane. Also, subsequent to concrete placement, cold flow of the waterproofing compound will take place and an adhesive bond will be added to the mechanical bond given by the fibers. With both a mechanical and adhesive bond, the concrete will be tightly sealed and bonded to the membrane, creating superior protection against moisture intrusion. 73 mil Underseal® Blindside™can also be used in certain horizontal applications.
VERTICAL APPLICATION: Underseal® PRM™ can be used in protected wall applications when applied to the exterior sides of vertical concrete foundation walls, tunnels, and related applications where waterproofing is critical. It allows for faster waterproofing applications by eliminating the step to install an additional protection course prior to backfilling operations. HORIZONTAL APPLICATION: Underseal® PRM™ can be applied to horizontal slab applications such as parking garages, plaza decks, plywood decks and related applications and allows for concrete topping slab installation without the need for a separate protection course in most situations.
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