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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Sealtight Kool-Rod




NO. 791



SEALTIGHT KOOL-ROD is specifically designed as a compressible backing material to be used in conjunction with a wide variety of cold-applied joint sealants.

SEALTIGHT KOOL-ROD is a closed cell, polyethylene, flexible, rope-like foam joint backing material. This material is virtually non-absorbent and chemically inert to most solvents. KOOL-ROD will not stain or adhere to sealant materials. It is fully compatible with acrylic, butyl, polyurethane, polysulfide, silicone and most other cold-applied sealant compounds.

#224  SOF-SEAL, two-part, low-modulus, Polymer joint sealant 
#225  SEALTIGHT #158, rubberized joint sealant 
#226  GARDOX, two-part, cold tar rubber joint sealer
#234 SAFE-SEAL (regular formula), multi-purpose, asphaltic joint sealer 
#235  SAFE-SEAL 3405, high performance asphaltic joint sealer  
#773  POURTHANE, two-part, self-leveling, Polyurethane joint sealant 
#784  DECK-O-SEAL, one- and two-part Polysulfide sealant 


SEALTIGHT KOOL-ROD is highly adaptable for both vertical and horizontal applications. It is commonly used in glazing operations, copings, between pre-cast panels, around door and window perimeters. It provides the perfect backing for all types of construction, expansion, isolation, control and pavement joints.


bulletControls depth of sealant / Ensures proper joint design ratio
bulletForces sealant against joint sidewalls / Provides maximum sidewall adhesion
bulletSealants will not adhere to KOOL-ROD / Eliminates 3-sided joint adhesion failure
bulletClosed cell foam technology / Does not allow air or moisture entrapment
bulletEasily compressible, lightweight / Installs quickly, stays in place
bulletNew, easy to handle, smaller packaging / Added contractor convenience

Joint or opening must be clean, dry and free of obstructions. Select the proper rod diameter and cut to length or use directly from the spool. With a blunt instrument or roller, uniformly install rod at a level recommended by the sealant manufacturer, specifier or architect. Generally, the depth of the joint after KOOL-ROD is installed should be one-half the width. Very large and very small joints vary in terms of this depth-to-width ratio.

Do not tear, puncture, twist or overly compress the backer rod during installation. Caution should be used to avoid any situation where voids may form and trap air / moisture between backer rod and sealant. Care should also be taken to prevent the introduction of air bubbles into the sealant during mixing (if, any) and / or installation.


Rod Diameter Joint Width Footage / Carton Packaging
1/4" (6mm) 3/16" (4mm) 4,000 LF (1219m) 2 spools / carton
3/8" (9.5mm) 1/4" (6mm) 2,100 LF (640m) 2 spools / carton
1/2" (12mm) 3/8" (9mm) 2,500 LF (762m) 2 spools / carton
5/8" (15mm) 1/2" (12mm) 1,550 LF (472m) 2 spools / carton
3/4" (19mm) 5/8" (15mm) 1,100 LF (335m)  2 spools / carton 
7/8" (22mm) 3/4" (19mm) 850 LF (259m) 1 spool / carton
1" (25mm) 7/8" (22mm) 600 LF (182m) 1 spool / carton
1-1/4" (31mm) 1" (25mm) 400 LF (121m) 1 spool / carton
1-1/2" (38mm) 1-1/8" (27mm) 420 LF (128m) 6' sections / carton
2" (50mm) 1-5/8" (41mm) 240 LF (73m) 6' sections / carton

This product last updated November, 2001

Products for Concrete Performance


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