MULTI-DIMENSIONAL WATERPROOFING MEMBRANE
Provides the latest state-of-the-art waterproofing
membrane that needs no additional adhesives or separate protection course.
SEALTIGHT MEL-GARD Waterproofing Membrane is a cost-efficient, panel-type
product with its own built-in protection course. Dual processes waterproofing
and membrane protection can be accomplished in one application.
SEALTIGHT MEL-GARD Multi-Dimensional, Self-Adhering Waterproofing Membrane
is composed of a unique combination of materials consisting of a weathercoated,
fortified asphaltic protection course layer bonded to an asphalt-saturated
carrier sheet which is bonded to a polymeric waterproofing membrane with a
release liner. The multi-layer membrane is flexible enough to conform to
concrete substrates that are reasonably smooth.
MEL-GARD is tough enough to resist punctures and tears during normal application
and backfilling operations. It is light enough for easy handling. Costly
callbacks are eliminated in order to replace lost or damaged foam boards
blown-off by the wind because backfilling wasn't done on schedule.
With MEL-GARD, backfilling can be done immediately. In fact, in high foundation
wall applications, backfill can be used as a natural scaffolding to reach the
higher wall surfaces. Contractors like the ease of handling the 4' x 8' (1.22 x
2.44m) board panel size. Architects, engineers, and contractors are offered more
cost effective and time-saving options for either vertical or horizontal
membrane panel application, even to using Detail Strip to seal the top surface
of foundation walls.
The waterproofing product has a W.V.T. (Water Vapor Transmission) rating of
0.015 gr./sq. ft./hr. (0.001395 gr./m²/hr.) which is significantly better than
other "peel and stick" self-adhering membranes. With MEL-GARD, no
additional adhesives or separate protection boards are required. As a result,
workers spend less time down in the hole and use less material to complete the
SEALTIGHT MEL-GARD Multi-Dimensional, Self-Adhering Waterproofing Membrane
provides a very cost-effective method for waterproofing foundations and vertical
walls and midlevel floors in commercial, industrial, institutional, and
Combined with another innovative product, PREMOULDED MEMBRANE® Vapor Seal with
PLASMATIC. Core (Refer to Catalog No. 711) for on grade vaporproofing, the two
products form a complete vapor/ waterproofing protection system.
A third unique product, AIR-SHIELD™ Self-Adhering Air Barrier and Flashing
Membrane can be added to form a trio designed to seal the building envelope for
overall cost savings and extended service life for the building wall and its
components (Refer to Product Data Sheet 07191-717).
Advantages and Benefits
|MEL-GARD provides a waterproofing membrane and a
protection course in one application
|Workers spend less time down in the hole and use less
material to complete the job
|MEL-GARD is flexible and easy to handle and apply
|Need for a separate protection course is eliminated
|Eliminates costly callbacks to replace lost or wind
damaged foam boards
|W.V.T. Rating of 0.015 grains/square feet/hour
(0.001395 grains/m²/hour) is significantly better than other "peel and
|Available in 4' x 8' (1.22 x 2.44m) sheets to meet
nearly every requirement
|Offers installers option of using either SEALTIGHT
Detail Strip or overlapping to securely seal all joint areas
|A very cost-effective and functionally effective method
|Compatible with other innovative and unique products to
form a protective seal for the entire building|
PHYSICAL PROPERTIES AND CHARACTERISTICS
|W. R. MEADOWS
2. Packaging (Sheets)
3. Wt/100 SF (9.29m²)
4. Total Thickness
5. Pliability 180º Bend Over 1"
6. Puncture Resistance
7. Tensile Strength
8. Elongation (Polymeric Membrane) 9. Adhesion to Concrete
10. Flood Test [2" (51mm)@ 24 hrs]
11. Water Vapor Transmission
(E96 Method B)
12. Exposure to Fungi
13. Water Absorption
@ 73ºF (23ºC) T-070
@ 40ºF (4ºC) T-070
ASTM E 154 T-059
ASTM D 412 T-050
ASTM D 882 T-050
ASTM D 412, D 882) T-050
Pulled in Shear
(16 weeks) Buried in Soil
44 pounds (19.96 kg)
74-84 lbs. (33.57-38.10 kg)
850-1300 psi (5.87-8.97 MPa)
70-100 lbs. (31.76-45.36 kg)
34 psi (.235 MPa)
21 psi (.145 MPa)
29 psi (.200 MPa)
MEL-GARD is ideal for use wherever water and/or
moisture is to be kept from penetrating vertical concrete walls, above or below
grade. The combination of easy-to-handle 4' x 8' (1.22 x 2.44m) panels and its
self-adhesive feature makes MEL-GARD particularly well suited for vertical
surface usage. The built-in protection course guards against damage during
construction and backfilling. Prior to MEL-GARD application, SEALTIGHT Detail
Strips are applied to the inside and outside corners and over footings. MEL-GARD
offers installers the option of sealing joints by overlapping or by using
SEALTIGHT Detail Strips. Once MEL-GARD application is completed, backfilling can
begin immediately. Where a high foundation wall is to receive several levels of
MEL-GARD, backfilling can be done as the installation progresses, thus
eliminating the need for scaffolding. Masonry walls must be parge coated with
SEALTIGHT SEALMASTIC Trowel-Grade Emulsion and allowed to dry before applying
When MEL-GARD sheets are applied in a vertical or horizontal pattern on
vertical surfaces or in a horizontal application. the sheets should be
overlapped 3" (76.2cm) with the joints staggered. By following this
procedural pattern, excessive material build-ups in the joint areas can be
STORAGE AND HANDLING: Store membrane sheets on pallets and cover if left
outside. Keep materials away from sparks and flames. Store where temperature
will not exceed 90ºF (32ºC) for extended periods of time.
SURFACE PREPARATION: Concrete surfaces must be clean, free of standing water and
be reasonably smooth, so the panels will not "bridge" but lay flat to
the surface. Patch all holes and voids and smooth-out any surface mis-alignments.
PRIME: Vertical surfaces must be primed with SEALTIGHT MEL-PRIME Primer prior to
application of the MEL-GARD. Spray on the primer with commercial-type sprayer. A
lamb's wool roller can also be used. Prior to application, prime all vertical
and/or horizontal surfaces to be covered in one working day with applicable
MEL-PRIME Primer. Uncovered, primed surfaces must be reprimed the next day,
Follow all instructions and precautions shown on primer containers.
TEMPERATURE: Apply in dry, fair weather when the air and surface substrate
temperatures are above 25ºF (-1ºC) and above.
FOOTING DETAILS: Use SEALTIGHT Detail Strips for impaction coverage. First, fold
strips lengthwise and cut at the fold. Material is then ready to install as
4-1/2" (11.43cm) strips on either side of the rebar. Any excess can be
turned down the face of the footings. Next, fill the keyway with SEALTIGHT
Catalytic Bonding Asphalt.
Form and pour the walls. Install a SEALTIGHT Detail Strip horizontally along the
wall where it meets the footing placing half the material up the wall and the
other half onto the footing. Extend the material 4-1/2'' (11.43cm) beyond
outside corners. Slit extended portion of detail strip lengthwise. Place the
horizontal flap out onto the footing and bend the vertical flap around the wall
(See Diagram A). Repeat this procedure in the opposite direction as shown in
VERTICAL WALLS: Apply MEL-GARD Membrane vertically or horizontally to primed
surface and begin each sheet at the top of the footing and work upward to the
desired level. Overlap joints 3" (7.62 cm) And roII the overlapped joint.
The height of the wall determines vertical or horizontal sheet application. In a
typical vertical sheet application, begin at the bottom of the wall and work
upward with each succeeding sheet overlapping by 3" and firmly roll in
place. Likewise if the horizontal method is used for higher walls, also begin at
the bottom of the wall and work upward with each succeeding sheet overlapping
the lower sheet by 3" and firmly roll in place.
Stagger the joints of the second layer to avoid coincidence of joint with the
first sheet application. This provides a "shingle effect" to drain
surface water away from the membrane.
OPTION: If desired, the installer can elect to use a retaining strip or reglets
at the top of the panel to assure that sheet movement will not occur during
Once application has been completed, the installer has two options for sealing
off the top of the membrane sheets. The workman can apply SEALTIGHT Pointing
Mastic along the top of the sheets or if the membrane panels are close to the
top of the wall. Detail Strip can be applied horizontally at the top termination
and overlapping the top sheets.
Masonry wails must be parge-coated with SEALTIGHT Trowel Grade Emulsion and
allowed to dry to seal porosity prior to membrane application.
HAND-RUB AND ROLL PRESS: Once positioned, immediately hand-rub MEL-GARD Membrane
firmly to the surface and then pressure roll the overlap and complete surface to
assure positive adhesion.
INSIDE CORNERS: Before MEL-GARD is applied, place a vertical SEALTIGHT Detail
Strip on inside corners extending the material 4-1/2" (11.43cm) beyond each
side of the corner (See Diagram D).
Terminate at the footing and finish the corner with SEALTIGHT Pointing Mastic.
OUTSIDE CORNERS: After the membrane is applied, bend a SEALTIGHT Detail Strip
vertically over the outside corner and extend 4-1/2" (11.43cm) beyond each
side of the corner. Terminate the material at the footing, Finish the corner
with Pointing Mastic (See Diagram C).
DRAINS AND PROTRUSIONS: All protrusions should be sealed
with 2 layers of MEL-GARD Membrane applied at least 6" (152.4mm) in all
directions. Seal all terminations with SEALTIGHT Pointing Mastic. Around drains
apply 2 layers of MEL-GARD Membrane and put a bead of Pointing Mastic between
the membrane and clamping rings and at all terminations, drains and protrusions.
NOTE: SEALTIGHT Moisture and Vapor Protection Membrane products can help reduce
the amount of radon entering a building when used as one of the components of a
radon control system.
INSPECT AND REPAIR: Inspect and repair immediately before covering. Tears and
inadequate overlays should be covered with MEL-GARD Membrane and the patch edges
sealed with Pointing Mastic.
PROTECT THE MEMBRANE: Backfilling should be done immediately using care and
A.R.E.A. Specifications, Chapter 29, Waterproofing.
4' x 8' (1.22 - 2.44m) Sheets
MEL-GARD should be applied at substrate temperatures of 25°F (1°C) or
above by trained applicators using correct waterproofing techniques and
procedures. Indoor storage is suggested. Store on a flat surface, not more than
one pallet high. Backfilling should begin as soon as the application of MEL-GARD
is completed. Care should be taken not to disrupt the bond of the membrane to
the walls. Be sure the backfill material is not dropped against the membrane in
such a manner that it could drag the sheet down vertically.
Masonry walls must be parge-coated with SEALMASTIC Trowel Grade Emulsion and
allowed to dry before applying MEL-GARD. Prime the dried parge coat prior to
applying MEL-GARD. The use of MEL-GARD does not negate the need for relief of
hydrostatic heads. A complete drain tile system should be placed around the
exterior of footings and under slabs, as required.
Avoid the use of products which contain tars, solvents, pitches, Polysulfide
Polymers, or PVC materials that may come into direct contact with MEL-GARD.
Read and follow application information, precautions and Material Safety Data
SEALTIGHT MEL-PRIME WATER-BASE PRIMER: Prepares concrete surface for MEL-GARD
Membrane application. Arrives ready to use. Requires no additional mixing.
MEL-PRIME emits no unpleasant odors and works with all SEALTIGHT Waterproofing
Membranes. Applied easily with manual sprayer or roller. V.O.C. Compliant.
MEL-PRIME is for use at temperatures of 40°F (4°C) and up. COVERAGE: 250 to
350 sq. ft./gal. (6.14 to 8.59m²/Iiter).
SEALTIGHT MEL-PRIME SOLVENT-BASE OR SOLVENT VOC PRIMERS: These primers are for
use at temperatures of 25°F (-4°C) and above.
COVERAGE: 250-350 sq.ft./gal. (6.14 to 8.59m²/Iiter)
PACKAGING: 5 Gallon (18.93 Liter) Pails.
SEALTIGHT POINTING MASTIC: Used for sealing protrusions and corner details of
SEALTIGHT membranes. COVERAGE 1/8" x 1"x 200'/gallon (3.18mm x 25.4mm
x 60.96m/3.79 liters)
PACKAGING: 5 Gallon (18.93 Liter) Pails. 29 oz. (857.65ml) cartridges.
CATALYTIC BONDING ASPHALT: Easy-to-apply one-component material for sealing
around footing rebars. COVERAGE: 200 sq. ft./gal (18.58m²)
PACKAGING: 5 Gallon (18.93 Liter) Pails.
SEALTIGHT DETAIL STRIP: Convenient, easy-to-use detail
strips provide an economical and effective method for sealing top terminations,
vertical and horizontal butt joints, i.e. inside or outside corners and where
walls and footings meet. They may also be used for sealing top terminations on
PACKAGING: 9" x 50' (.23 x 15.24m) roll, 4 rolls per carton.
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.