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 158




NO. 225 


Single-component, cold-applied joint sealant makes short work of sealing contraction and dummy joints.

SEALTIGHT #158 Cold-Applied Rubberized-Asphalt Sealer is a ready-to-use, gun-grade joint sealer developed for use in sealing all contraction and dummy joints in pavement, curb and gutter sections.

Technical Description
SEALTIGHT #158 Cold-Applied Rubberized-Asphalt Sealer is a single-component, cold-applied rubber-asphalt joint sealing compound. It is applied under pressure through an extruding nozzle or from a caulking gun, for complete joint filling.

SEALTIGHT #158 Cold-Applied Rubberized-Asphalt Sealer was developed for use in sealing horizontal contraction and dummy joints in pavements and curbs and gutters to prevent the penetration of water and incompressibles into the joint. For use in sealing deep joints up to 1/4" (6.35mm) in width, or shallow joints with a 1/2" (12.7mm) depth maximum. To control joint depth and sealant usage, SEALTIGHT KOOL-ROD Backer Rod may be inserted into the joint opening.

Features and Benefits

bulletReady-to-use direct from the joint sealant container or cartridge
bulletPrevents penetration of water and incompressibles into the joint
bulletRecommended for use in sealing joints up to 1/2" (12.7mm) wide
bulletEasy to apply

50 lb. (22.7 kg) Pails
455 lb. (206.4 kg) Drums

Application Tools

Heavy Duty Pump

Professional Bulk Caulk Gun


SURFACE PREPARATION: Joint to be sealed with SEALTIGHT #158 must be cleaned of all dust, dirt, laitance or any foreign material and be dry. When resealing old joints, all sealing material must be removed and the joint interfaces cleaned by sandblasting or mechanical abrading. All joints should be cleaned with compressed air just prior to the sealant application.

METHOD OF APPLICATION: SEALTIGHT #158 is ready-to-use direct from the container. A professional bulk caulking gun can be used for smaller joint sealing operations. In larger installations, use a heavy-duty, 20:1 ratio flange bulldog pump with follower plate and extension nozzle. For best results, fill the joint from the bottom to 1/8" (3.18mm) below the pavement surface. Avoid bridging or leaving air pockets in the sealant.

Pavement and air temperature should be 40F (4C) or higher for application of #158. In cold weather, store in a heated warehouse to reduce viscosity for ease of application.

ASTM D 1850
Federal Specification SS-S-158

65.1 Ib./ft (1045 kg/m). A 1/4" x 2" (6.35 x 50.8mm) joint will require 22.7 Ibs./100 lineal feet (33.5 kg/100m).

SEALTIGHT #158 is not intended or recommended for use in joints subject to foot traffic, swimming pool joints or joints subjected to hydrostatic pressure. Once applied, #158 should be covered or protected until the skin forms. Recommended for use in sealing deep joints up to 1/4" (6.35mm) in width or shallow joints having a 1/2" (12.7mm) maximum depth. Read and follow application information, precautions and Material Safety Data information.

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.


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