07_92_00__JOINT_SEALANTS.pdf

SECTION 07 92 00

JOINT SEALANTS

01/07

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

o ASTM C 920 (2005) Elastomeric Joint Sealants

1.2 SUBMITTALS

The following shall be submitted in accordance with the SCOPE OF WORK:

SD-03 Product Data. Manufacturer's descriptive data including storage requirements, shelf life, curing time, instructions for mixing and application. A copy of the Material Safety Data Sheet shall be provided for each solvent, primer or sealant material.

o Sealants o Primers o Bond breakers o Backstops

SD-07 Certificates. Certificates of compliance stating that the sealant conforms to the specified requirements.

1.3 ENVIRONMENTAL CONDITIONS

The ambient temperature shall be within the manufacturer recommended temperature limits when the sealant is applied.

1.4 DELIVERY AND STORAGE

Deliver materials to the job site in unopened manufacturers' external shipping containers, with brand names, date of manufacture, color, and material designation clearly marked thereon. Elastomeric sealant containers shall be labeled to identify type, class, grade, and use. Carefully handle and store materials to prevent inclusion of foreign materials or subjection to sustained temperatures exceeding 90 degrees F.

PART 2 PRODUCTS

2.1 EXTERIOR SEALANTS

2.1.1 Sheet Metal and Flashing

Polyurethane, type S, conforming to ASTM C 920, Grade NS, Class 25, non-bleeding, capable of continuous water immersion. Color for visible surfaces shall match the trim or adjacent metal color.

2.1.2 Reglets

Suitable for bonding to both metal and masonry, as recommended by the reglet manufacturer or polyurethane, type S, conforming to ASTM C 920, Grade NS, Class 12, non-bleeding, capable of continuous water immersion.

2.2 PRIMERS

Provide a non-staining, quick-drying type and consistency recommended by the sealant manufacturer for the particular application.

2.3 BOND BREAKERS

Provide the type and consistency recommended by the sealant manufacturer to prevent adhesion of the sealant to backing or to bottom of the joint.

2.4 CLEANING SOLVENTS

Provide type(s) recommended by the sealant manufacturer.

PART 3 EXECUTION

3.1 SURFACE PREPARATION

Surfaces shall be clean, dry to the touch, and free from dirt frost, moisture, grease, oil, wax, lacquer, paint, or other foreign matter that would tend to destroy or impair adhesion. Oil and grease shall be removed with solvent and surfaces shall be wiped dry with clean cloths. When resealing an existing joint, remove existing calk or sealant prior to applying new sealant.

3.2 APPLICATION

Install sealants in accordance with manufacturer instructions assuring proper 2:1 width to depth ratios. Install sealants free from air pockets, gaps, foreign matter or sags, assuring proper contact with surfaces. Tool joints concave.

End of Section 07 92 00