Product Data Sheet
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Pre-Applied Waterproofing Membrane
HYDRASTOP SA is a composite, self-adhered sheet membrane comprised of a non-woven fabric, elastomeric membrane, and coated release paper. Once concrete is poured against HYDRASTOP SA and the concrete cures, a mechanical bond forms that secures the concrete to the membrane. The HYDRASTOP SA system is comprised of the HYDRASTOP SA membrane as well as MEL-DRAIN™ composite drainage board from W. R. MEADOWS.
HYDRASTOP SA is used as a pre-applied waterproofing membrane in vertical applications where access to the site requires a pre-applied waterproofing membrane prior to pouring the foundation walls. The product can also be used for horizontal suspended balcony slabs that will receive a concrete topping. Compatible substrates include plywood and concrete.
- Provides a waterproof seal between the membrane and poured concrete wall.
- Helps prevent moisture migration into the structure.
39″ x 50′ (991 mm x 15.2 m) long rolls, one roll per carton. Store cartons on pallets and cover if left outside. Keep materials away from sparks and flames.
Surface Preparation … Inspect all surfaces for any conditions detrimental to the proper completion of the work. Surfaces should be structurally sound. Remove debris or any other foreign material that could damage the membrane.
Application Method … HYDRASTOP SA may be applied at temperatures down to 40° F (5° C). MEL-PRIME™ from W. R. MEADOWS should be used to enhance the bond at the selvage edge when conditions warrant it. In colder temperatures, use HYDRASTOP SA LOW TEMP, which can be applied at temperatures down to -7° C (19° F).
Membrane Application … Mechanically attach with fasteners every 12″ (304.8 mm) across the top, within ½” (13 mm) of the top edge of the membrane. Install the membrane with the fabric side facing toward the concrete pour. Remove release paper and roll press onto MEL-DRAIN drainage board.
Prior to application of the blindside membrane, attach MEL-DRAIN™ rolled matrix drainage system from W. R. MEADOWS to lagging or soil retention system.
Remove release paper on 3″ (76.1 mm) overlap. Apply membrane and roll press into place with a tile type roller.
End Laps … Overlap membrane 6″ (152.4 mm). Prior to overlap, apply BEM, HYDRALASTIC 836, or MEL-ROL® LIQUID MEMBRANE (two-component) from W. R. MEADOWS in area to be lapped. Roll press membrane into BEM, HYDRALASTIC 836, or MEL-ROL LIQUID MEMBRANE. At terminations of membrane, apply BEM, HYDRALASTIC 836, or MEL-ROL LIQUID MEMBRANE 12″ (304.8 mm) wide centered over the termination and while still wet, embed 12″ (304.8 mm) wide DETAIL FABRIC into the HYDRALASTIC 836 or MEL-ROL LIQUID MEMBRANE and roll press into place. Ensure that DETAIL FABRIC is centered over the termination with 6″ (152.4 mm) on each side of lap edge. Apply additional HYDRALASTIC 836 on all terminations of DETAIL FABRIC.
Penetrations and Protrusions … Detail around all penetrations using BEM, HYDRALASTIC 836, or MEL-ROL LIQUID MEMBRANE (two-component). Apply BEM, HYDRALASTIC 836, or MEL-ROL LIQUID MEMBRANE by forming a fillet around the pipe or protrusion, overlapping the fabric side of HYDRASTOP SA and the protrusion a minimum of 2.5″ (64 mm). If the gap between the protrusion and the membrane is greater than ½” (13 mm), apply DETAIL FABRIC over the fully-cured BEM, HYDRALASTIC 836, or MEL-ROL LIQUID MEMBRANE (minimum 24 hours cure required). All penetration and protrusion surfaces must be clean, rust-free, and sound prior to application of MEL-ROL LIQUID MEMBRANE.
Patching … Prior to pouring, inspect membrane for punctures or damage and repair as necessary with HYDRALASTIC 836 and/or DETAIL FABRIC.
Concrete should be poured within 60 days of membrane installation. For installations below 40° F (4° C), contact W. R. MEADOWS technical services. When using bar supports, use those with a flat bottom. The use of HYDRASTOP SA does not negate the need for relief of hydrostatic head. A complete drain tile system should be placed around the exterior of footing and under slabs, as required.
|Property||Test Method||HYDRASTOP SA Results|
|Thickness||ASTM D1000||80 Mils (Nominally)|
|Low Temp Flexibility||ASTM D1970, 180° @ -25° F (-32° C)||Pass|
|Resistance to Hydrostatic Head||ASTM D5385-93||230′ (70 m)|
|Elongation||ASTM D412-06||> 400%|
|Crack Cycling||ASTM C836 @ -15° F (-26° C)||Pass|
|Puncture Resistance||ASTM E154||260 lb. (1155 N)|
|Peel Adhesion to Concrete||ASTM D903||10 lb./in (1754 N/m)|
Why You Need a Pre-Applied Waterproofing Membrane on Your Vertical Application