This is a limited joint sealer spec.
Note re: Masonry joint sealers: Some silicone sealants bleed silicone oil which can permanently stain masonry units. Some tend to collect more dirt than polyurethane sealants, which can be visually significant, especially with light colored masonry, mortar, or sealants. (In 1996 there are “clean seal” products available.) High-quality silicone sealants weather better than polyurethane, but polyurethanes are most often specified as masonry joint sealers for appearance.
See“Selecting a Joint Sealant” in Masonry Construction Dec 96.
Sealants are often petroleum-based and release solvents on curing. For "non-petroleum, non-plastic sealants with no solvent release, consider AFM or Auro products:
AFM Enterprises, 350 Ash St. Suite 700, San Diego CA 92101-3404, (619) 239-0321.
Sinan Co., P.O.Box 857, Davis, CA 95617 (916) 753-3104. (Auro products)

SECTION 07900 — JOINT SEALERS


PART 1 — GENERAL

1.01 DESCRIPTION

Extent of joint seal er work is shown on Drawings or indicated herein.

1.02 COMPATIBILITY

Provide materials selected for compatibility with each other and with substrates in each system. Follow manufacturer's recommendations.

1.03 GENERAL CHARACTERISTICS

Provide type, grade, class, hardness and similar characteristics of material indicated or as required to comply with manufacturer's recommendations relative to exposures, traffic, weather conditions and other factors of the joint system for best possible overall performance. Except as otherwise indicated, joint sealers are required to maintain airtight and waterproof seals, without failures in joint movement accommodation, cohesion, adhesion, migration, staining, and other performance as specified.

1.04 PROJECT CONDITIONS

Proceed with installation of joint sealers only when joint substrates are dry and when ambient and substrate temperature conditions are within the limits permitted by joint sealer manufacturers or above 40°F.


PART 2 — PRODUCTS

2.01 SILICONE SEALANT

Provide G.E. Silicone or equal, clear.

2.02 TERPOLYMER SEALANT

Provide Pecor "Unicrylic", Tremco "Mono" or approved equal, color to be selected by Architect.

2.03 ACOUSTIC SEALANT

Provide manufacturer's standard, non-drying, non-hardening, non-skinning, non-staining gunnable synthetic rubber sealant recommended for sealing interior concealed joints to reduce transmission of airborne sound.

2.04 FIRE-RESISTANT SEALANT

Provide manufacturer's standard sealant and accessory materials with fire-resistance rating indicated which are identical to those of assembles whose fire endurance has been determined by testing following ASTM E 814 by Underwriters Laboratory or other testing agency acceptable to authorities having jurisdiction.

2.05 MISCELLANEOUS MATERIALS

Provide primers and cleaners recommended by manufacturers where required.

Provide forming, joint fillers, packing and other accessory materials required for installation of fire-stopping sealants as installation conditions require.


PART 3 — EXECUTION

3.01 INSTALLATION

Install sealants strictly according to manufacturer's recommendations. Apply only to clean dry surfaces and only when temperatures are over 40 degrees F. Install in 'hour-glass' section with depth equal to 50% of normal joint width, but no more than 1/2" nor less the 1/4".

Install sealant, including forming, packing and other accessory materials to fill openings around mechanical and electrical services penetrating floors and walls to provide fire-stops with fire resistance ratings indicated for floor and wall assembly in which penetration occurs.

Close and seal tightly all partly used sealant containers and store protected in well ventilated fire-safe area at moderate temperature. Place used sealant tubes and other containers in areas designated for hazardous materials.


END OF SECTION 07900

JOINT SEALERS 07900-#
courtesy of Design Coalition, Architects. , Madison, Wisconsin, USA ~~ www.designcoalition.org