O'Brill Company

Construction Specialty Suppliers

       6626 N. Milwaukee Ave.

Niles, IL 60714

773-775-1122 or 847-647-0005

FAX 847-647-7819

Since 1967

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NO. 714


Provides cost effective "peel and stick" protection for structures from moisture migration.

SEALTIGHT MEL-ROL Waterproofing System is a roll-type membrane designed to provide cost-effective, quick and easy-to-apply waterproofing protection against damaging moisture migration and the infiltration of free water.

Technical Description
SEALTIGHT MEL-ROL Waterproofing System is a flexible, versatile, dependable, roll-type waterproofing membrane. It is composed of a nominally 56 mil thick layer of polymeric waterproofing membrane on a heavy-duty, 4 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 2-1/2" (63.5mm) in from the material edge on each side to assure proper overlap coverage and 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.

All components of the MEL-ROL Waterproofing System including the SEALTIGHT MEL-PRIME Primer, SEALTIGHT Pointing Mastic, SEALTIGHT Detail Strips and MEL-ROL Membrane work together to provide a cost-effective, positive waterproofing system that's quick and easy-to-apply.

SEALTIGHT 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 a 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.

Installation of SEALTIGHT Protection Course is recommended before backfilling. It can also be used with drainage boards when specified.

OSHA-approved excavation wall shoring has been removed for the unobstructed purposes of photographic illustration of product application. NOTE: Please follow all OSHA regulations for proper personnel protection involving excavations.

MEL-ROL combines positive waterproofing protection with ease of handling

Advantages and Benefits

bulletProvides a cost-effective, flexible, versatile, dependable, positive waterproofing protection against damaging moisture migration and the infiltration of free water
bulletOffers a quick and easy-to-apply system for maximum productivity
bulletSpecial membrane-to-membrane adhesion provides additional overlap security
bulletMeets or exceeds the test requirements of all currently applicable specifications
bulletComponents work together for positive waterproofing protection
bulletHandles with ease on the jobsite
bulletThe product will help meet and maintain the maximum slab moisture transfer rate of 3 lbs./1000 sq. ft./24 hours required by the flooring industry specifications.

Properties and Characteristics

Color Carrier Film  White   
Polymeric Membrane  Black   
Thickness Carrier Film  4 mils   
Polymeric Membrane  56 mils   
Tensile Strength Carrier Film  5,900 psi min. (40.71MPa)  ASTM D 412 (Die C) 
Polymeric Membrane  590 psi min. (4.07MPa)   
Elongation Polymeric Membrane  455% min.  ASTM D 412 (Die C) 

Peel Adhesion Dry  7-11 lb./in. (125-196 g/mm) width, min.  Footnote  
Peel Adhesion Wet 7-12 lb./in. (125-214 g/mm) width, min.   
Pliability 180 Bend, 1" (25.4mm) Mandrel @ -25F (-32C)  Unaffected (5.72/10g/PaSM)  ASTM D 146 
Water Vapor Transmission .05 gr./sq.ft./hr.  ASTM E 96 (Method B) 
Water Absorption  0.1%, 72 hrs. max.  ASTM D 570 (M) 
Resistance to Hydrostatic Head  Equiv. to 150 ft. (45.72m) of water  Footnote  
Puncture Resistance  67 lbs.  ASTM E154 
Exposure to Fungi  Pass, 16 weeks  Soil Test 
90% peel after 7 days at 70F (-21C) plus 7 days at 120F (49C) plus 7 days at 70F (-21C) (Dry) (Wet). 
Membrane placed over a porous base in a test cell and edges sealed. Water was placed over test specimen. Cell fastened and sealed and placed under 65 psi (.45 Mpa) (approx. 150 foot (45.72m) water head) pressure for 24 hours. Test specimen did not show any water to permeate the membrane.  

Application Tools



Caulking Gun

Paint Roller


Manual Sprayer

STORAGE AND HANDLING: Store membrane cartons on pallets and cover if left outside. Keep materials away from sparks and flames. Store where temperature will not exceed 90F (32C) 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.

TEMPERATURE: Apply in dry, fair weather when the air and surface temperatures are above 25F (-4C). Do not apply to frozen concrete.

PRIME: Prior to application, prime all 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.

FOOTING DETAILS: Use SEALTIGHT Detail Strips for impaction sheet coverage. First, fold strips lengthwise and then cut at the fold. Material is then ready to install as 4-1/2" (114.3mm) strips on either side of the rebar. Any excess can be turned down the face of the footing. Next, fill the void around rebars in the keyway with SEALTIGHT Catalytic Bonding Asphalt. 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" (114.3mm) 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.




HORIZONTAL APPLICATIONS: Position the MEL-ROL Membrane from low to high point so all laps will shed water. Stagger end laps and overlap all seams at least 2-1/2" (63.5mm). Apply a double-thickness of the MEL-ROL Membrane over construction, control and expansion joints and over cracks greater than 1/16" (1.59mm) wide.

VERTICAL WALL APPLICATION: Apply MEL-ROL Membrane vertically in lengths approximately 8' (2.44m) long over the top of the horizontal Detail Strips at the footing. Overlap all seams at least 2-1/2" (63.5mm). Tightly butt edges of membrane and apply SEALTIGHT Pointing Mastic in corner applications (See Diagram C).

To the top terminations, apply SEALTIGHT Pointing Mastic at least 1/8" (3.18mm) thick and 1" (25.4mm) wide. As an option, SEALTIGHT Termination Bars may be used to mechanically fasten the membrane. Masonry walls must be parge-coated with an asphaltic foundation coating or a cementitious material before applying MEL-ROL.

HAND-RUB AND ROLL PRESS: Once positioned, immediately hand-rub MEL-ROL Membrane firmly to the surface and then pressure roll the complete surface to assure positive adhesion.


INSIDE CORNERS: Before MEL-ROL is applied, place a vertical SEALTIGHT Detail Strip on inside corners extending the material 4-1/2" (114.3mm) beyond each side of the corner (See Diagram D). Terminate at the footing and finish the corner with SEALTIGHT Pointing Mastic.

OUTSIDE CORNERS: Bend a SEALTIGHT Detail Strip vertically over the outside corner and extend 4-1/2" (114.3mm) beyond each side of the corner. Terminate the material at the footing. Finish the corner with SEALTIGHT Pointing Mastic (See Diagram C).

DRAINS AND PROTRUSIONS: All protrusions should be sealed with two layers of Membrane applied at least 6" (152.4mm) in all directions. Seal all terminations with SEALTIGHT Pointing Mastic. Around drains apply two layers of MEL-ROL Membrane and put a bead of SEALTIGHT 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 Membrane. Slit fishmouths and patch. Seal edges of all patches with SEALTIGHT 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 SEALTIGHT Protection Course, if no drainage system is used, or MEL-DRAIN DB. (Refer to Catalog Sheet No. 712 and Product Data No. 719-PD for application instructions.) Use SEALTIGHT Pointing Mastic as an adhesive. Backfilling should be done immediately using care and caution to avoid damaging the waterproofing application.

SEALTIGHT MEL-PRIME WATER-BASE PRIMER: Prepares concrete surfaces for MEL-ROL 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. VOC-compliant. MEL-PRIME is for use at temperatures of 40F (4C) and up.
Coverage: 250 to 350 ft/gal. (6.14 to 8.59m/liter)
Packaging: 1 gallon (3.79 liter) units, 4 units per carton and 5 gallon (18.93 liter) Pails

SEALTIGHT MEL-PRIME VOC-compliant solvent-base or standard solvent-base primers: These primers are for use at temperatures of 25F(-4C) and above.
Coverage: 250-350 ft/gal. (6.14 to 8.59m/liter)
Packaging: 5 gallon (18.93 liter) Pails

SEALTIGHT LIQUID MEMBRANE: A two-component material used as a flashing, to form fillets at corners and at protrusions. May be used as a substitute for the SEALTIGHT Pointing Mastic.
Coverage: As a fillet, approximately 135 lineal feet/gallon (10.87 meters/liter)
Packaging: 1 gallon (3.79 liter) units, 4 units per carton.

SEALTIGHT POINTING MASTIC: Used for sealing top edge terminations on SEALTIGHT Detail Strips and membrane.
Coverage: 1/8" x 1" x 200 ft./gal. (3.18mm x 25.4mm x 16.10ml)
Packaging: 5 gallon (18.93 liter) Pails or 29 oz. (857.65ml) cartridges, 12/ctn.

SEALTIGHT CATALYTIC BONDING ASPHALT: Easy-to-apply one-component material for sealing around rebar.
Coverage: 5 gal./1,000 ft (4.9mL)
Packaging: 5 gallon (18.93 liter) Pails

SEALTIGHT DETAIL STRIP: Convenient, easy-to-use detail strips provide an economical and effective method for sealing vertical and horizontal butt-joints i.e. inside or outside corners and where walls and footings meet.
Packaging: 9" x 50' (.23 x 15.24m) roll, 4 rolls per carton.

PROTECTION COURSE: Use SEALTIGHT Protection Course for vertical and horizontal applications. Adhere with the SEALTIGHT POINTING MASTIC.
Size: 4' x 8' (1.22 x 2.44m) panels (Refer to Protection Course Catalog No. 712.)

Provides 180 ft. (17.88m) per roll.

38.5" (.98m) wide x 60' (18.29m) long, one roll per carton

AREMA Specifications Chapter 29, Waterproofing

Read and follow application information and precautions. Refer to Material Safety Sheet for complete Health and Safety Information. Avoid the use of products which contain tars, solvents, pitches, polysulfide polymers, or PVC materials that may come into contact with MEL-ROL.

Maintain Energy Efficiency
SEALTIGHT Products aid in the integrity of other structural systems such as insulation. Because wet insulating materials lose much of their R factor performance characteristics, this reduces the energy efficiency of the structure. SEALTIGHT Products applied for thermal and moisture protection help prevent moisture or vapor penetration into the other systems. These products play a key role in maintaining the structure's energy efficiency.

This material last updated November, 2000.

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.


Home Up 1100 - Clear Series 1200 - White 1300 - Clear 1600 - White 164 588 Precision Grout Ceramar Cera-Rod CG-86 Control Joints CS-309-25 CS-309-30 Deck-O-Foam Direct Fire Parking Sealant Duogard Duogard II Evapre Expo-Gloss Fibre Expansion Joint Gardox Hi-Spec Hydraset Hydraset-Free Intralok Lin-Seal Lin-Seal Emulsion Lin-Seal White Liqui-Hard Meadow-Plug Med-Cure Mel-Dek Mel-Drain DB Mel-Gard Melnar Mel-Prime SB VOC Mel-Prime WB Mel-Rol Pac-It Plastic Joint Materials Pourthane Premoulded Membrane Premoulded Tongue and Groove Protection Course PVC Waterstops Red Rosin Paper Rezi-Weld 1000 Rezi-Weld 3-2 Rezi-Weld Gel Paste State Rezi-Weld Gel Paste Rezi-Weld LV Rezi-Weld Rapid Set Roof Traffic Pads Sealex Sealmastic Sealmastic Emulsion Sealtight 1190 Sealtight 158 Sealtight 3405 Sealtight Acry-Lok Sealtight Air-Shield Sealtight CR-90 Sealtight Deck-O-Seal Sealtight Futura-15 Sealtight Kool-Rod Sealtight Meadow-Crete FNP Sealtight Meadow-Crete GPS Sealtight Meadow-Crete H2 Sealtight Meadow-Patch 20 Sealtight Meadow-Patch 5 Sealtight Meadow-Patch T1 Sealtight Meadow-Patch T2 Sealtight Patch-Prime Sealtight Poly-Grip Sealtight Poly-Jet 1614 Sealtight Poly-Jet 200-E Sealtight Poly-Jet 3406 Sealtight Premoulded Membrane Sealtight Rezi-Weld Flex Sealtight Safe-Seal 3405 Sealtight Sealex E-Z Sealtight Ultrite Degreaser Sealtight Seal Cure CS-309-25 Sewer Joint Sof-Seal Tiah Vibraflex Vocomp-20 Vocomp-25 Vocomp-30

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Copyright 2002 O'Brill Company
Last modified: August 09, 2004