DECK WATERPROOFING SYSTEM
Provides a cost effective waterproofing
underlayment for asphaltic overlays.
SEALTIGHT MEL-DEK is a flexible, dependable roll-type waterproofing membrane
designed for bridges, parking decks or other vehicular structures to be
overlaid with an asphaltic wearing course.
SEALTIGHT MEL-DEK is a roll-type waterproofing membrane composed
of a nominally 53 mil thick layer of polymeric waterproofing membrane
on a shrink-resistant, heavy-duty 12 mil thick, polypropylene woven carrier
fabric. The 2 components are laminated together under strictly controlled
SEALTIGHT MEL-DEK Waterproofing System provides an excellent
waterproofing membrane for bridges, parking decks or other vehicular traffic
structures to be overlaid with an asphaltic concrete wearing course. Ideal
for repair, maintenance or new construction applications.
Advantages and Benefits
- Requires no protection...can withstand the dynamic
placement of hot asphaltic overlays
- Provides 3/4" membrane-to-membrane weld at
seams for positive, monolithic protection
- Flexible, dependable, cost-effective and easy to
- Meets a wide range of maintenance and new construction
Lamb's Wool Roller
NOTE: For applications
receiving overlays other than asphalt, please consult with W.R. MEADOWS
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.
TEMPERATURE: SEALTIGHT MEL-DEK may be applied in fair weather at air and
concrete surface temperatures of 40ºF (4ºC) and higher.
JOINTS AND SLAB DRAINAGE: Apply a reinforcing strip of SEALTIGHT DETAIL
STRIP over all non-working joints or cracks over 3/16" (4.76mm) wide
before applying finished membrane.
Seal all terminations with SEALTIGHT POINTING MASTIC. 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.
PRIMING: Prime all surfaces to be covered with SEALTIGHT MEL-PRIME Water-Base
or MEL-PRIME Solvent-Base VOC Primer. Primer may be spray-applied or applied
with a lamb's wool roller. Allow primer to dry until tack-free. Primed
areas not covered in 24 hours must be reprimed. Coverage, 250 to 300 ft.²/gal.
(6.14 to 7.36m²/L).
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 2-1/2" (63.5mm) after removing the white
polyethylene strip that exposes the 3/4" rubberized asphalt. This
will give you the membrane to membrane weld at seams. Longitudinally,
overlap 6" (150mm) and seal with Pointing Mastic. Once positioned,
the 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 SEALTIGHT POINTING MASTIC.
NOTE: If a thickness greater than 125 mils 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 fishmouths and patch. Seal
edges of all patches with SEALTIGHT POINTING MASTIC.
PAVING: Placement of the asphaltic concrete overlay should be accomplished
as soon as possible after application of the MEL-DEK. A minimum 2"
(50mm) compacted overlay thickness is required. The temperature of the
asphaltic concrete at the time of compaction should be a minimum of 290ºF,
and not exceed 340ºF. Protect the membrane surface from unnecessary
traffic. Place the overlay from low point to high point with care and
60' (18.29m) long x 38.5"(.98m) wide Rolls
180 ft.² (16.72 m²) of effective waterproofing
Refer to Material Safety Data Sheet for complete Health and Safety information.
|| 65 mils
| Tensile Strength, ASTM D 882
Fill 90 lbs
| 90 lbs. (40.82 Kg)/35%
90 lbs. (40.82 Kg)/45%
| Puncture, ASTM E 154
|| 275 lbs. (125 Kg)
| Flexibility, ASTM D 146
180º Bend, 1/4" (6.35mm) mandrel
@ -26ºF (-32ºC)
| Water Vapor Transmission, ASTM E-96
|| 0.03 Perms
| Water Absorption, ASTM D 1228
| Independent test report
available upon request
This material last updated December, 2001.
W. R. MEADOWS, INC. warrants that, at the time and
place we make shipment, our materials will be of good quality and will
conform with our published specifications in force on the date of acceptance
of the order. THE FOREGOING WARRANTY SHALL BE EXCLUSIVE AND IN LIEU OF
ANY OTHER WARRANTY, EXPRESS OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ALL OTHER
WARRANTIES OTHERWISE ARISING BY OPERATION OF LAW, COURSE OF DEALING, CUSTOM
OF TRADE OR OTHERWISE. As the exclusive remedy for breach of this Warranty,
we will replace defective materials, provided, however, that the buyer
examine the materials when received and promptly notify us in writing
of any defect before the materials are used or incorporated into a structure.
Three (3) months after W. R. MEADOWS, INC. has shipped the materials,
all our Warranty and other duties with respect to the quality of the materials
delivered shall conclusively be presumed to have been satisfied, all liability
therefore terminates, and no action for breach of any such duties may
thereafter be commenced. W. R. MEADOWS, INC. shall in no event be liable
for consequential damages. Unless otherwise agreed to in writing, no warranty
is made with respect to materials not manufactured by W. R. MEADOWS, INC.
We cannot warranty or in any way guarantee any particular method of use
or application of the performance of materials under any particular condition.
Neither this Warranty nor our liability may be extended or amended by
our salesmen, distributors or representatives, or by our distributor's
representatives, or by any sales information or drawings.