Unit A, 21/F, KP Tower, 93 King’s Road, North Point, Hong Kong(852) 2911 0103

W.R. MEADOWS MEL-ROL Waterproofing Membrane


MEL-ROL Self-Adhering Waterproofing Membrane

MEL-ROL waterproofing system is a flexible, versatile, dependable, bituminous, roll-type waterproofing membrane. It is composed of a nominally 56 mil thick layer of polymeric waterproofing membrane on a heavy duty, four-mil thick, cross-laminated polyethylene carrier film. The two components are laminated together under strict quality-controlled production procedures.


A handy overlap guideline is printed 2 ½” (63.5 mm) in from the material edge on each side to assure proper overlap coverage and to assist in maintaining a straight application. Special exposed polymeric membrane strips are provided on both sides for positive membrane-to-membrane adhesion in the overlap area. The membrane strips are protected by a pull-off release strip.


MEL-ROL waterproofing system provides a cost-effective answer to properly waterproof foundations, vertical walls, and below-grade floors in residential and commercial construction. It is equally effective for use as between-the-slab waterproofing on plaza decks, parking decks, and structural slabs. Use it as a waterproofing membrane to isolate mechanical and electronic rooms, laboratories, kitchens, and bathrooms. MEL-ROL offers positive protection when “wrapped around” major rapid transit, vehicular, utility, and pedestrian tunnel projects. MEL-ROL can also be used on insulated concrete forms (ICF).


Installation of PROTECTION COURSE from W. R. MEADOWS is recommended before backfilling. MEL-ROL can also be used with drainage boards when specified.



  • Provides cost-effective, flexible, versatile, dependable, positive waterproofing protection against damaging moisture migration and the infiltration of free water.
  • Offers a quick and easy-to-apply system for maximum productivity.
  • Special membrane-to-membrane adhesion provides additional overlap security.
  • Meets or exceeds the test requirements of all currently applicable specifications.
  • Components work together for positive waterproofing protection.
  • Handles with ease on the jobsite.
  • Available in a low temperature version for use when air and surface temperatures are between 20° F (-7° C) and 60° F (16° C). An extra-low temp version is also available, ideal for application in extra-low temperatures down to 0º F (-18º C).

38.5″ (977.9 mm) wide x 62.5′ (19.1 m) long, one roll per carton.


Provides 200 ft.2 (18.6 m2) per roll. Gross coverage is 200 ft.(18.6 m2). [Net coverage is 187.5 ft.2 (17.4 m2) with overlap of 2 ½” (63.5 mm).]


Store membrane cartons on pallets and cover if left outside. Keep materials away from sparks and flames. Store where temperature will not exceed 90° F (32° C) for extended periods of time.



Surface Preparation

Concrete should be cured at least 72 hours, be clean, dry, smooth, and free of voids. Repair spalled areas; fill all voids and remove all sharp protrusions.



A handy overlap guideline is printed 2 ½” (63.5 mm) in from the material edge on each side, assuring proper overlap coverage and assisting in maintaining a straight application. The self-adhesive waterproofing membrane is protected by a special, easy-to-remove release paper. The exposed membrane strips on the material edges are protected by a pull-off release strip. Exposed polymeric membrane strips are provided on both sides of MEL-ROL for positive membrane-to-membrane adhesion in the overlap area.


COLOR…Carrier Film
Polymeric Membrane
THICKNESS…Carrier Film
Polymeric Membrane
4 mils
56 mils
5900 psi min. (40.71 MPa)
460 psi min. (3230 KPa)
ASTM D 412 (Die C)
100 Cycle -25° F (-32° C)
PassASTM C 836
PEEL ADHESION11.8 lb./in. (2068 N/m)ASTM D 903
LAP ADHESION8.62 lbf/in. (1508.5 N/m)ASTM D 1876
WATER ABSORPTION0.1%, 72 hrs. max.ASTM D 570
HYDROSTATIC RESISTANCEEquiv. to 230.9′ (70.38 m) of waterASTM D 5385
EXPOSURE TO FUNGIPass, 16 weeksSoil Test
FLEXIBILITY @ -20° F (-29° C)PassASTM D 1970




Apply in dry, fair weather when the air and surface temperatures are above 40° F (4° C). Do not apply to frozen concrete.

MEL-ROL LOW TEMP can be used when air and surface temperatures are between 20° F (-7° C) and 60° F (16° C).


Surface Conditioning

Apply MEL-PRIME adhesive to surfaces that will be covered within one working day. If left exposed overnight, additional adhesive must be applied. Follow all instructions and precautions on containers.


REMOVE release paper from MEL-ROL from the top edge of the roll and firmly press exposed area to the wall. Remove the release paper from the rolls in a downward direction, pressing MEL-ROL into place on the wall.


Self-Adhesive Waterproofing Membrane Mel-Rol

Footing Details

Use DETAIL STRIP for impaction sheet coverage. First, fold strips lengthwise and then cut at the fold. Material is then ready to install as 4 ½” (114.3 mm) strips on either side of the rebar. Any excess can be turned down on the face of the footing. Next, fill the voids around rebars in the keyway with CATALYTIC BONDING ASPHALT. Pour the walls. Install 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 ½” (114.3 mm) 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 Diagram B.


MEL-ROL can be applied to concrete, masonry surfaces, wood, insulated wall systems, and metal. All substrates must be clean, dry, and free of all surface irregularities.


Horizontal Application

Remove release paper on edge, then position the MEL-ROL membrane. Pull balance of release paper off, running the roll from low to high points so that all laps will shed water. Stagger end laps and overlap all seams at least 2 ½” (63.5 mm). Apply a double-thickness of the MEL-ROL membrane over construction, control, and all expansion joints and cracks greater than 1/16″ (1.59 mm) wide.


Vertical Wall Application

Masonry walls may require the application of a cementitious parge-coat. Allow the parge-coat to dry before priming and applying MEL-ROL. When applied, the parge-coat will produce a smooth, uniform, and well-bonded surface. Remove release paper, then apply vertically in lengths approximately 8′ (2.44 m) long over the top of the horizontal DETAIL STRIP at the footing. Overlap seams at least 2 ½” (63.5 mm). Tightly butt edges of membrane and apply POINTING MASTIC in corner applications. (See Diagram C.)



To the top terminations, apply POINTING MASTIC at least 1/8″ (3.18 mm) thick and 1″ (25.4 mm) wide. As an option, TERMINATION BAR may be used to fasten the membrane mechanically.


Hand-Rub and Roll Press

Once positioned, immediately hand-rub the MEL-ROL membrane firmly to the surface, removing any bubbles or wrinkles, then pressure roll the complete surface to assure positive adhesion.


Inside Corners

Before MEL-ROL is applied, place a vertical DETAIL STRIP on inside corners extending the material 4 ½” (114.3 mm) beyond each side of the corner. (See Diagram D.) Terminate at the footing and finish the corner with POINTING MASTIC



Outside Corners

Bend DETAIL STRIP vertically over the outside corner and extend 4 ½” (114.3 mm) 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 two layers of membrane applied at least 6″ (152.4 mm) in all directions. Seal all terminations with POINTING MASTIC. Around drains, apply two layers of MEL-ROL and put a bead of POINTING MASTIC between the membrane and clamping rings and at all terminations, drains, and protrusions. 





Inspect and Repair

A thorough inspection should be made before covering and all necessary repairs made immediately. Tears and inadequate overlaps should be covered with MEL-ROL … slit fish mouths and patch. Seal edges of all patches with POINTING MASTIC. Where applicable, horizontal applications can be flood-tested for 24 hours. All leaks should be marked and repaired when membrane dries.


Protect the Membrane

on all vertical and horizontal installations with the immediate application of PROTECTION COURSE if no drainage system is used, or MEL-DRAIN. To secure PROTECTION COURSE, use POINTING MASTIC as an adhesive, and/or physically attach at the top edge using TERMINATION BAR. Backfilling should be done immediately, using care and caution to avoid damaging the waterproofing application.


Avoid the use of products that contain tars, solvents, pitches, polysulfide polymers, or PVC materials that may come into contact with MEL-ROL. The use of MEL-ROL does not negate the need for relief of hydrostatic heads. A complete drain tile system should be placed around the exterior of footing and under slabs, as required.