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. 710


Provides a waterproofing membrane, an impermeable vapor seal and a protection course all in one application.

SEALTIGHT MELNAR Polymeric Surface Waterproofing Membrane is an economical, self-adhering sheet-type waterproofing membrane with an impermeable vapor seal.

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.

Technical Description
SEALTIGHT MELNAR Polymeric Surface Waterproofing Membrane is composed of a unique selection of materials, combined under strict quality controlled conditions and manufactured into a membrane panel that provides the functions of 3 products: A waterproofing membrane, an impermeable vapor-seal and a protection course all in 1 application.

MELNAR is a rugged, seven-ply membrane consisting of the PLASMATIC Matrix encased in fortified bitumen and topped by a weather-coated, inert reinforcing ply. Below the PLASMATIC core is a reinforcing carrier sheet to which is bonded the dual purpose polymeric surface a highly flexible polymeric material applied at a controlled 62.5 mils (1/16") thickness.

MELNAR's dual-purpose polymeric surface is both a waterproofing membrane and an adhesive when the panels are properly applied by trained applicators using correct waterproofing techniques and procedures.

MELNAR, while rigid enough to permit easy handling, is flexible enough to conform to substrates that are reasonably smooth. It is ruggedly built to resist punctures and tears during normal construction and backfilling operations. It eliminates the need for a separate protective cover when placing concrete and/or backfilling.

MELNAR offers a WVT rating of 0.00 gr./sq. ft./hr., the lowest in the industry

SEALTIGHT MELNAR Polymeric Surface Waterproofing Membrane is used for water and vaporproofing exterior vertical surfaces and interior and exterior horizontal surfaces, above and below grade, where protection against moisture migration and/or water movement is required. Typical applications include foundation walls, between slab waterproofing, plaza and parking deck waterproofing and similar installations.


Advantages and Benefits

bulletProvides a constant, uniform factory-controlled thickness protection throughout the total system, unlike fluid-applied membranes
bulletOffers "single system" versatility for most water and vaporproofing needs...cuts installation time and costs
bulletAvoids cost and confusion of duplicate materials and differing application techniques on the job
bulletSpeeds installation. Just prime the surface, peel-off the anti-stick sheet, position the membrane panels and roll-press the panels in place
bulletKeeps tools required to a minimum. Panels cut and trim easily with a roofer's knife. No special tools required. Nothing to mix, heat or prepare
bulletApply MELNAR and backfill immediately no lengthy drying period..saves time and money
bulletCompares competitively with hot or cold liquid membranes with protection course applications. MELNAR is substantially faster and more economical to install with a minimum of waste

Physical Properties and Test Results




Detail Strip


180 Bend Over 1/4" (6.35mm)
mandrel AT 0F (-18C)
180 bend over 1" (25.4mm)
mandrel at 73F (23C)
ASTM D 781
Pulled in shear

Pulled in shear

ASTM E 96, Method B

ASTM D 1228

Feet of Water
(See note below)
No cracking or other
No cracking or other
Average (8) 754 Beach units
Average 21.5 lbs./in
(15.12 g/mm)
Average 33.0 lbs./in
(23.20 g/mm)
0.078% Vol.
0.068% Wt.
Will withstand
75 ft. Head

NOTE: Properties and values determined by a Chicago Testing Laboratory evaluation of standard material from a production run.

Application Tools

Roofer's Knife


Caulking Gun

Manual Sprayer

Paint Roller


Vertical Application
MELNAR 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' by 8' panels and its adhesive feature makes MELNAR particularly well suited for vertical surface usage. Provides a monolithic, water and vapor-proof barrier capable of withstanding a 75 ft. head of water. The built-in protection course guards against damage during construction and backfilling.

Once MELNAR is installed, SEALTIGHT Detail Strips are applied to the inside and outside corners and over each panel's butt-joint, backfill immediately. Where the foundation wall is to receive several courses of MELNAR, backfilling can be done as the installation progresses, thus eliminating the need for scaffolding. Masonry walls must be parge coated with an asphaltic foundation coating or a cementitious material before applying MELNAR. NOTE: MELNAR sheets may be applied in a vertical or horizontal pattern. Patterns can be intermingled.

Horizontal Application
MELNAR is tailor-made for use in between slab construction. The panels are butted tightly together and, when the joints are properly sealed with SEALTIGHT Detail Strips, the result is a monolithic barrier that provides continuous contact with the surface to preclude lateral movement of water under the membrane. Panels and strips must be rolled-with-pressure to assure maximum adhesion. Because of its rugged, built-in protection course, MELNAR can withstand normal construction traffic and the placing of concrete. It remains flexible and is unaffected by repeated freeze/thaw cycles.

On concrete slabs, with an asphalt overlay, the direct applied, compacted hot asphalt will not penetrate the protection of MELNAR. This makes MELNAR ideal for use in areas subject to traffic vibrations. Other typical applications include between-slab waterproofing in building floors, on plaza and parking decks, under shower pans and flood floors, and above and below computer and mechanical rooms.

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 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 and horizontal surfaces must be primed with SEALTIGHT MEL-PRIME Primer prior to application of the MELNAR. Spray on the primer with commercial-type sprayer. A lambs wool roller can also be used. Prior to application, prime all vertical and/or horizontal surfaces to be covered in 1 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 40F (4C) and above.

FOOTING DETAILS: Use SEALTIGHT Detail Strips for impaction coverage. First, fold strips lengthwise and then 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 footing. Next, fill 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" (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, shown in Diagram B.





VERTICAL WALLS: Apply MELNAR Membrane vertically in lengths approximately 8' (2.44m) long over the top of the horizontal Detail Strips, and terminate at the footing. Butt MELNAR sheets tightly together. Apply Detail Strips over each butted joint. Tightly butt edges of MELNAR membrane and apply SEALTIGHT Pointing Mastic in the corner (See Diagram C). To the top terminations, apply SEALTIGHT Pointing Mastic at least 1/8" (3.18mm) thick and 1" (25.4mm) wide. Masonry walls must be parge-coated with TROWEL MASTIC before applying MELNAR.

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

INSIDE CORNERS: Before MELNAR 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 MELNAR Membrane applied at least 6" (152.4mm) in all directions. Seal all terminations with SEALTIGHT Pointing Mastic. Around drains apply 2 layers of MELNAR Membrane and put a bead of Pointing Mastic between the membrane and clamping rings and at all terminations, drains and protrusions.

HORIZONTAL INSTALLATIONS: Apply MELNAR Membrane horizontally butting the sheets tightly together. SEALTIGHT Detail Strips should be used to cover each butted-joint. MELNAR and Detail Strips should be roll-pressed after application.

INSPECT AND REPAIR: Inspect and repair immediately before covering. Tears and inadequate overlays should be covered with MELNAR Membrane and the patch edges sealed with Pointing Mastic.

PROTECT THE MEMBRANE: Backfilling should be done immediately using care and caution.

4' x 8' (1.22m x 2.44m) Sheets

SEALTIGHT Mel-Prime Water-Base Primer
Prepares concrete surface for MELNAR 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)

SEALTIGHT Mel-Prime Solvent-Base or Solvent VOC Primers
These primers are for use at temperatures of 25 (-4) and above.
Coverage: 250-350 ft/gal. (6.14 to 8.59m/liter)
Packaging: 5 gallon (18.93 liter) Pails

SEALTIGHT Pointing Mastic
Used for sealing top terminations on SEALTIGHT Detail Strip and membrane.
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) Pail and 29 oz. (857.65ml) cartridges.

SEALTIGHT Catalytic Bonding Asphalt
Easy-to-apply one-component material for sealing around rebar.
Coverage: 5 gal./1,000 ft. (4.9 liters/m)
Packaging: 5 gallon (18.93 liter) Pail

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.


A.R.E.A. Specifications, Chapter 29, Waterproofing. See Catalog No. 230 for Bridge Deck Waterproofing application.
W.V.T. 0.00 gr./sq. ft./hr.

MELNAR should be applied at substrate temperatures of 40F (4C) or above by trained applicators using correct waterproofing techniques and procedures. Indoor storage is suggested. Store on a flat surface, not more than 1 pallet high.

Backfilling should begin as soon as the application of MELNAR is completed and must be done within 48 hours after the material is applied to the wall. 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 or dislodge the overlay strips.

Masonry walls must be parge-coated with an asphaltic foundation coating or a cementitious material before applying MELNAR. Prime the dried parge coat prior to applying MELNAR. The use of MELNAR 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 MELNAR. Read and follow application information, precautions and Material Safety Data information.


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