CHEMSEAL+5--Guide Specification
Chemical Resistant, Polysulfide-Coated, Structural Expansion Joint Seal

MANUFACTURER'S GUIDE SPECIFICATION: CHEMSEAL+5 by EMSEAL

SECTION 07 90 00 and 07 95 00 (formerly 05810 / 07102 / 07915)-- SEALANTS, CAULKING, & SEALS

CHEMSEAL+5   Chemical Resistant, Polysulfide-Coated, Structural Expansion Joint Seal

The following contains a short-form guide spec as well as a comprehensive performance spec for use at the specifier’s option.  Please call EMSEAL with any questions.  Toll Free: 800-526-8365 or 508-836-0280.  Email: techinfo@emseal.com

***CRITICAL ADDITION TO DIVISION 3—CONCRETE.  Note to specifier:  To facilitate successful expansion joint installation, follow the link below and include the proposed language in Division 3***

General Contractor Expansion Joint Responsibilities [.rtf]

***SHORT-FORM GUIDE SPECIFICATION***

Application: Where expansion joint systems contact non-purified water or liquid-suspended chemicals.

Basis of Design:  CHEMSEAL+5

 EMSEAL JOINT SYSTEMS, LTD, 25 Bridle Lane Westborough, MA 01581-2603, Toll Free: 800-526-8365 or PH: 508-836-0280, FX: 508-836-0281, www.emseal.com.

CANADA:  EMSEAL CORPORATION, 120 Carrier Drive, Toronto, Ontario, Canada, M9W 5RI Toll Free: 800-526-8365 or PH: 416-740-2090, FX: 416-740-0233, www.emseal.com

Basis of Design: CHEMSEAL+5 SYSTEM – Polysulfide-bellows-coated, microsphere-modified-acrylic impregnated precompressed joint sealant for expansion joints and isolation joints in applications where continuous or intermittent contact with non-pure water or liquid chemicals is expected.  Typical locations include, but are not limited to the following: applications for joints in and around swimming pools, fountains, water parks, water features, waste water treatment plants and tanks, secondary containment tanks, spill containment tanks or ditches, chemical storage tank perimeters or covers, etc.  System shall remain watertight under pressures resulting from up to 5-feet of liquid head pressure and shall accommodate movement at the joint from thermal cycling. 

Sealant system shall be comprised of three components: 1) microsphere-modified, 100% acrylic impregnated foam factory-coated on the contact surface with chemical-resistant polysulfide sealant; 2) field-applied epoxy adhesive primer, 3) field-injected polysulfide sealant bands.  Impregnation agent to have proven non-migratory characteristics. Polysulfide coating to be applied to the impregnated foam sealant at a width greater than maximum allowable joint extension and when cured and compressed will form a bellows.  Product must be proved to have been tested under simulated head pressure testing in a suitable testing assembly, to be capable of resisting indefinitely the equivalent of 5-feet of positive liquid head pressure. Material shall be capable of movements of +25%, -25% (50% total) of nominal material size. Nominal material size to match field-measured joint size at mean-temperature or must be adjusted for mean temperature. Depth of seal to manufacturer's standard.    

Installation: The top 3/4-inches of concrete or other substrate on the joint faces is to be primed using manufacturer's supplied polysulfide primer.  CHEMSEAL+5 foam seal to be installed into manufacturer-supplied field-applied epoxy adhesive.  The CHEMSEAL+5 SYSTEM is to be installed slightly recessed from the surface such that when the field-applied injection band of polysulfide sealant is installed between the substrates and the foam-and-polysulfide-bellows, the system will be essentially flush with the substrate surface.  Joins between lengths of material to be joined using a field-application of manufacturer-supplied liquid polysulfide at the adjoining bellows faces and top 3/4-inches of adjoining foam.  Any exposed foam ends must be covered in the field with a skim-coat of the manufacturer supplied liquid polysulfide sealant.

Manufacturer-supplied polysulfide sealant to be shipped in 1.5 gallon kits in two components.   The full 1.5 gallon kit must be mixed and the mixed sealant drawn up into a bulk gun from which it will be dispensed.  The working time on a mixed kit is about 1 hour at 70-deg F. (21-deg C). Some wastage should be expected and extra kits may need to be ordered by the applicator depending on the total quantity, temperature at time of installation and staging of the work.

Factory-fabricated universal-90-degree termination and transition units shall be used to terminate all joints into vertical plane surfaces (walls, parapets, ends of decks, etc) as well as to transition the material through curbs, or other in-slab plane changes.  Universal-90-degree termination and transitions pieces to be single units containing minimum 12-inch long leg and 6-inch long leg on each side of the direction change respectively.  Both the top and bottom surfaces of the entire unit to be continuously coated with the polysulfide bellows. Termination pieces to have the top of the 6-inch leg factory-mitered and bellows-coated at 45-degrees to provide a transition point to vertical-grade materials, or when installed as a downturn termination at deck edges to act as a drip edge. Factory-fabricated units to be field-joined to straight lengths in accordance with manufacturer’s prescribed methods and supplied joining materials. 

All substitute candidates in addition to demonstrating in writing the testing used to determine the material's ability to withstand up to 5-feet of liquid head pressure,  shall provide certification in writing to be free in composition of any waxes or asphalts, wax compounds or asphalt compounds.  All substitute candidates shall be certified in writing to be: a) capable of withstanding 150°F (65°C) for 3 hours while compressed down to the minimum of movement capability dimension of the basis of design product (-25% of nominal material size) without evidence of any bleeding of impregnation medium from the material; and b) that the same material after the heat stability test will self-expand to the maximum of movement capability dimension of the basis-of-design product (+30% of nominal material size) within 24 hours at room temperature 68°F (20°C). 

***END OF SHORT-FORM GUIDE SPECIFICATION***

***COMPLETE GUIDE SPECIFICATION***

SECTION 07 90 00 and 07 95 00 (formerly 05810 / 07102 / 07915)-- SEALANTS, CAULKING, & SEALS

Application:    Where expansion joint systems contact non-purified water or liquid-suspended chemicals.     CHEMSEAL+5   Chemical Resistant, Polysulfide-Coated, Structural Expansion Joint Seal

PART 1 – GENERAL

1.01            RELATED DOCUMENTS

A.                   The requirements of the GENERAL CONDITIONS, SUPPLEMENTARY CONDITIONS and DIVISION 1 GENERAL REQUIREMENTS apply to the work of this section.

1.02            DESCRIPTION

A.            Basis of Design: CHEMSEAL+5 SYSTEM – Polysulfide-bellows-coated, microsphere-modified-acrylic impregnated precompressed joint sealant for expansion joints and isolation joints in applications where continuous or intermittent contact with non-pure water or liquid chemicals is expected.  Typical locations include, but are not limited to the following: applications for joints in and around swimming pools, fountains, water parks, water features, waste water treatment plants and tanks, secondary containment tanks, spill containment tanks or ditches, chemical storage tank perimeters or covers, etc.  System shall remain watertight under pressures resulting from up to 5-feet of liquid head pressure and shall accommodate movement at the joint from thermal cycling. 

1.03            RELATED WORK SPECIFIED ELSEWHERE

A.                   CONCRETE

1.04            QUALITY ASSURANCE

A.           Manufacturer's Instructions: In addition to requirements of these specifications, comply with manufacturer's instructions and recommendations for all phases of work, including preparation of substrate, applying materials, and protection of installed units.

1.05            SUBMITTALS

General: Submit the following in accordance with (***Designer: Insert appropriate section reference for submittals***).

A.             Product data in the form of manufacturer's product specifications, installation instructions, and details for each type of expansion joint sealant system indicated.

B.            Samples of same materials to be used in work

C.            Including certification in writing that the material has been tested to withstand up to 5-feet of liquid head pressure, 

D.            Certification in writing that the material to be supplied will be free in composition of any waxes or asphalts, wax compounds or asphalt compounds. 

E.            Certification in writing in writing that the material to be supplied is: a) capable of withstanding 150°F (65°C) for 3 hours while compressed down to the minimum of movement capability dimension of the basis of design product (-25% of nominal material size) without evidence of any bleeding of impregnation medium from the material; and b) that the same material after the heat stability test will self-expand to the maximum of movement capability dimension of the basis-of-design product (+30% of nominal material size) within 24 hours at room temperature 68°F (20°C). 

1.06            PRODUCT DELIVERY, STORAGE AND HANDLING

A.             Deliver materials as factory packaged, sealed, and labeled.  Handle and protect as necessary to prevent damage or deterioration during shipment, handling and storage.

B.             Follow any special instructions by manufacturer or manufacturer’s representative.

1.07            PROJECT CONDITIONS

A.             Substrate Condition:  Proceed with work only when substrate construction and preparation work is complete and in condition to receive sealant system.

B.             Weather Conditions:  Perform work only when existing and forecasted weather conditions are within the guidelines established by the manufacturer of the sealant system.

PART 2 – PRODUCTS

2.01            ACCEPTABLE MANUFACTURERS

A.             Manufacturers known to be able to supply materials as specified:

                EMSEAL JOINT SYSTEMS, LTD, 25 Bridle Lane Westborough, MA 01581-2603, Toll Free: 800-526-8365 or PH: 508-836-0280, FX: 508-836-0281, www.emseal.com.

                CANADA:  EMSEAL, LLC, 120 Carrier Drive, Toronto, Ontario, Canada, M9W 5R1 Toll Free: 800-526-8365 or PH: 416-740-2090, FX: 416-740-0233, www.emseal.com 

2.02        MATERIALS

A.    Sealant system shall be comprised of three components: 1) microsphere-modified, 100% acrylic impregnated foam factory-coated on the contact surface with chemical-resistant polysulfide sealant; 2) field-applied epoxy adhesive primer, 3) field-injected polysulfide sealant bands.  Impregnation agent to have proven non-migratory characteristics. Polysulfide coating to be applied to the impregnated foam sealant at a width greater than maximum allowable joint extension and when cured and compressed will form a bellows.  Product must be proved to have been tested under simulated head pressure testing in a suitable testing assembly, to be capable of resisting indefinitely the equivalent of 5-feet of positive liquid head pressure. Material shall be capable of movements of +25%, -25% (50% total) of nominal material size. Nominal material size to match field-measured joint size at mean-temperature or must be adjusted for mean temperature. Depth of seal to manufacturer's standard.    

B.  All substitute candidates in addition to demonstrating in writing the testing used to determine the material's ability to withstand up to 5-feet of liquid head pressure,  shall provide certification in writing to be free in composition of any waxes or asphalts, wax compounds or asphalt compounds.  All substitute candidates shall be certified in writing to be: a) capable of withstanding 150°F (65°C) for 3 hours while compressed down to the minimum of movement capability dimension of the basis of design product (-25% of nominal material size) without evidence of any bleeding of impregnation medium from the material; and b) that the same material after the heat stability test will self-expand to the maximum of movement capability dimension of the basis-of-design product (+30% of nominal material size) within 24 hours at room temperature 68°F (20°C). 

PART 3 – EXECUTION

3.01            INSPECTION

A.             Joint surfaces to receive seal shall be sound, smooth, straight, parallel, clean, dry and free of all visible contaminants.  Applications of non-visible coatings or contaminants to surfaces of joint interface area prior to installation of seal shall be controlled by the Architect/Engineer in consultation with the expansion joint manufacturer.

B.             The joint configuration and the joint surfaces shall be as detailed in the drawings and in accordance with the contract specifications and in compliance with requirements in the current material Tech Data available from the Manufacturer. All known detrimental conditions shall be reported immediately in writing.  Field measurements of the depth and width of the joint shall be supplied to manufacturer before material is ordered.

3.02            INSTALLATION

A.             Do not proceed with the installation of joint sealer if the joint is other than designed, until written notification of these conditions is submitted to the manufacturer and design professional, and a written acknowledgement with an order to proceed is provided.

B.            Do not proceed with the installation of joint sealer under adverse weather conditions when joint to be sealed is damp, wet or frozen, or when temperatures are below or above the manufacturer's recommended limitations for installation. Consult manufacturer for specific instructions before proceeding.

C.           Joint sealer/expansion joint material to be installed in strict accordance with the manufacturer's instructions and the advice of their official representative.

C.           Installation: The top 3/4-inches of concrete or other substrate on the joint faces is to be primed using manufacturer's supplied polysulfide primer.  CHEMSEAL+5 foam seal to be installed into manufacturer-supplied field-applied epoxy adhesive.  The CHEMSEAL+5 SYSTEM is to be installed slightly recessed from the surface such that when the field-applied injection band of polysulfide sealant is installed between the substrates and the foam-and-polysulfide-bellows, the system will be essentially flush with the substrate surface.  Joins between lengths of material to be joined using a field-application of manufacturer-supplied liquid polysulfide at the adjoining bellows faces and top 3/4-inches of adjoining foam.  Any exposed foam ends must be covered in the field with a skim-coat of the manufacturer supplied liquid polysulfide sealant.

               Manufacturer-supplied polysulfide sealant to be shipped in 1.5 gallon kits in two components.   The full 1.5 gallon kit must be mixed and the mixed sealant drawn up into a bulk gun from which it will be dispensed.  The working time on a mixed kit is about 1 hour at 70-deg F. (21-deg C). Some wastage should be expected and extra kits may need to be ordered by the applicator depending on the total quantity, temperature at time of installation and staging of the work.

              Factory-fabricated universal-90-degree termination and transition units shall be used to terminate all joints into vertical plane surfaces (walls, parapets, ends of decks, etc) as well as to transition the material through curbs, or other in-slab plane changes.  Universal-90-degree termination and transitions pieces to be single units containing minimum 12-inch long leg and 6-inch long leg on each side of the direction change respectively.  Both the top and bottom surfaces of the entire unit to be continuously coated with the polysulfide bellows. Termination pieces to have the top of the 6-inch leg factory-mitered and bellows-coated at 45-degrees to provide a transition point to vertical-grade materials, or when installed as a downturn termination at deck edges to act as a drip edge. Factory-fabricated units to be field-joined to straight lengths in accordance with manufacturer’s prescribed methods and supplied joining materials. 

3.03            CLEANING AND PROTECTION

A.             Remove all waste materials from site.   Leave work in a condition satisfactory to the Architect/Engineer.

END OF SECTION