Product Data Sheet
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Deck Waterproofing System
MEL-DEK is a roll-type waterproofing membrane that is 65 mils thick, composed of a polymeric waterproofing membrane on a shrink-resistant, heavy-duty, polypropylene woven carrier fabric. The two components are laminated together under strictly controlled production procedures.
MEL-DEK waterproofing system provides an excellent waterproofing membrane for bridges, parking decks or other vehicular traffic structures to be overlaid with an asphalt concrete wearing course. MEL-DEK is ideal for repair, maintenance, or new construction applications.
- Requires no protection … can withstand the dynamic placement of hot asphalt overlays.
- Provides 3/4″ (19.1 mm) membrane-to-membrane weld at seams for positive, monolithic protection.
- Flexible, dependable, cost-effective, easy to install.
- Meets a wide range of maintenance and new construction application needs.
60′ (18.29 m) long x 38.5″ (.98 m) wide rolls
180 ft.2 net (16.72 m2) of effective waterproofing coverage. [192.5 ft.2 (17.9 m2) gross coverage.]
- ASTM D6153, Type III
|Water Vapor Permeance (water method) perms:||ASTM E96||0.10|
|Tensile Strength – membrane (MD) psi:||ASTM D882||1616|
|Tensile Strength – membrane (CMD) psi:||ASTM D882||1476|
|Elongation at Break -membrane (MD) %:||ASTM D882||1468|
|Elongation at Break – membrane (CMD) %:||ASTM D882||1659|
|Low Temp Pliability
[180° Bend, ¼” (6.4 mm) mandrel @ -15° F (-26.1° C)]:
|ASTM D146||No Cracking|
|Penetration @ 25° C
|Softening Point, °F (°C):||ASTM D36||205 (96.1)|
|Apparent Viscosity, cPs:||ASTM D3236||1,300|
Independent test report available upon request.
For full, detailed application instructions, see INSTALLATION GUIDELINE: MEL-DEK BRIDGE MEMBRANE available at www.wrmeadows.com. Note: For applications receiving overlays other than asphalt, please consult W. R. MEADOWS Technical Service.
Surface Preparation … New concrete surfaces are to be fully cured and dry or approved by the engineer. Surface is to be cleaned of all dust, dirt, and debris just prior to priming. Existing concrete surfaces are to have a smooth, sound, monolithic surface, free of voids, spalled areas, sharp protrusions, and loose aggregate. Remove all traces of old membranes, oil, grease, or other contaminants. For enhanced bond between asphalt overlay and MEL-DEK, apply an asphalt emulsion, water-based tack coat to the surface of MEL-DEK.
Temperature … MEL-DEK may be applied in fair weather at air and concrete surface temperatures of 40° F (4° C) and higher.
Joints and Slab Drainage … Apply a reinforcing strip of DETAIL STRIP from W. R. MEADOWS over all non-working joints or cracks over 3/16″ (4.76 mm) wide before applying finished membrane. Seal all terminations with POINTING MASTIC from W. R. MEADOWS. Deck surface must provide proper pitch to gutters and drains. Drainage openings should be provided at the structural deck level to drain any water that penetrates the asphaltic concrete surface.
Conditioning … Condition all surfaces to be covered with MEL-PRIME™, MEL-PRIME N.E., or MEL-PRIME W/B adhesive from W. R. MEADOWS. Adhesive may be spray-applied or applied with a lamb’s wool roller. Allow adhesive to dry until tack-free. Primed areas not covered in 24 hours must be re-primed.
Application Method … Apply MEL-DEK from low point to high point in both the longitudinal and transverse directions. In the transverse direction, overlap in shingle fashion 2 ½” (63.5 mm) after removing the white polyethylene strip that exposes the 3/4″ (19.1 mm) rubberized asphalt. This will provide the membrane-to-membrane weld at seams. Longitudinally, overlap 6″ (150 mm) and seal with POINTING MASTIC. Once positioned, MEL-DEK should be immediately hand-rubbed onto the surface, followed by a pressure-applied roll pressing of the complete surface to assure positive adhesion. Seal all terminations with POINTING MASTIC.
Note … Where a 125+ mil thick membrane is desired, overlap each roll of MEL-DEK 51%.
Inspect and Repair … Inspect thoroughly before covering and make any necessary repairs immediately. Patch all tears, slit fish mouths and patch, then seal edges of all patches with POINTING MASTIC.
Paving … Placement of the asphalt concrete overlay should be accomplished as soon as possible after application of MEL-DEK. A minimum 2″ (50 mm) compacted overlay thickness is required. The temperature of the asphalt concrete at the time of compaction should be a minimum of 290º F (143.3° C), not to exceed 340º F (171.1° C). Paving equipment should be rubber tire variety. Protect the membrane surface from unnecessary traffic. Place the overlay from low point to high point with care and caution.
Refer to Safety Data Sheet for complete health and safety information.