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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Mel-Prime WB




NO. 752-PD



Technical Description
SEALTIGHT MEL-PRIME W/B is a ready-to-use priming compound specifically formulated with polymers in a true water-base emulsion. MEL-PRIME appears reddish-white in the container and dries to a transparent finish with a reddish sheen. Furnished in 1 gallon (3.79 liter) and 5 gallon (18.93 liter) pails. MEL-PRIME W/B meets maximum VOC content limit of 350 g/L for Primers and Undercoaters as required by the U.S. EPA Architectural Coatings Rule.

Apply SEALTIGHT MEL-PRIME Water-Base Primer to simultaneously prepare and dustproof new and old, vertical and horizontal concrete in one easy, economical operation. Use MEL-PRIME to prime all concrete surfaces to receive applications of SEALTIGHT MEL-DEK, MEL-GARD, MEL-ROL, AIR-SHIELD and/or MELNAR Waterproofing Membranes.

Advantages and Benefits

bulletNon-combustible; Flash point greater than 210F
bulletReady-to-use; No mixing or dilution required
bulletContains fugitive dye for easy visual confirmation of coverage
bulletVOC-compliant...meets the U.S. EPA Architectural Coatings Rule requirements
bulletFor interior and exterior, vertical and horizontal applications

SURFACE PREPARATION: New concrete must be cured a minimum of 7 days. Lightweight structural concrete must dry for 14 days. Concrete surfaces must be clean, smooth, dry and structurally sound. For additional surface preparation requirements, see instructions for applying MEL-DEK, MEL-GARD, MEL-ROL, AIR-SHIELD and/or MELNAR Waterproofing Membranes.

APPLICATION: Apply MEL-PRIME W/B in fair weather when the surface and air temperatures are 40F (4C) and rising. Apply with a sprayer, roller or brush at a coverage rate of 250 to 350 ft./gal. (6.14 to 8.59m/L).

Prime only the area to be covered with the waterproofing membrane during the working day. Areas not covered with a membrane in 24 hours must be reprimed.

DRYING TIME: Allow to dry for one hour or until there is no evidence of dampness. If the work area is very dusty, apply membrane as soon as possible after MEL-PRIME W/B is dry.

NOTE: Metal surfaces do not require priming; however, they must be clean, dry and free of loose paint, rust or other contaminants.

CLEANUP: Application equipment may be cleaned with soap and water before the MEL-PRIME W/B dries. Once dry, equipment may be cleaned with mineral spirits.


1 gallon (3.79 liter) Units
5 gallon (18.93 liter) Pails

Do not apply MEL-PRIME Water-Base Primer when rain is imminent, on frozen or frost covered surfaces, when surface and air temperatures are below 40F (4C) or when the weather conditions are cold and damp. Avoid allowing MEL-PRIME to puddle this will lengthen drying time. Use "as is", do not dilute. Refer to Material Safety Data Sheet for complete health and safety information.


This material last updated January, 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