Pecora 898 NST: Sanitary Silicone

Pecora 898 NST is used as a sealant for the perimeters of fixtures of kitchen, lavatory, bathroom and other hygienic facilities. Used also to re-grout and/or reset ceramic tile. 898NST will not stain natural stone such as granite and marble.

Pecora 898NST is very low in odor, it is a single component sealant consisting of neutral curing silicone with outstanding aesthetical characteristics. Non-staining component: It will not stain sensitive porous natural stones such as marble or granite. Pecora 898 is expressly developed for interior applications that require exemption from bacterial growth, a complimentary appearance to adjoining surfaces and a high degree of cleanliness. A feature of Pecora NST line of silicone architectural grade sealants is the reduction in long term dirt pick up on sealant surface. Pecora 898NST adheres exceptionally well to plastics, glass, ceramic tile, porcelain, glazed pottery, enamel, natural or cultured marble, painted wood, metals, limestone, granite, and other natural stones.

Surface Preparation: Surfaces should be dry, clean and free of all contamination such as oils, protective coatings, detergent or soap films and grease.

Priming: Priming is not required on ceramic tile, glass or glazed surfaces. Certain other surfaces may require a primer for best adhesion. Contact Technical Services Department (800-523-6688) for specific recommendations.

Masking: Surfaces adjacent to joints should be masked before priming and/or sealant application to prevent staining and present a neat sealant line.

Application: sealant may be applied directly from plastic cartridges or bulk gun. No mixing or heating is required. Using sufficient pressure, apply sealant in a continuous operation to fill the joint completely and ensure firm contact to joint sides. Tool sealant slightly concave immediately after application using dry tooling techniques or a solvent. Do not tool with soap or detergent and water solutions. Remove masking tape and excess uncured sealant from adjacent surfaces using mineral spirits.

Clean Up: Remove all smears and extra sealant adjoining to joints with mineral spirits immediately. On equipment, use mineral spirits to remove uncured sealant. Use  sandpapering, scraping, etc to remove cured sealant. (Warning: mineral spirits is toxic and flammable. Observe manufacturer’s precautions).

Tool Time: (Initial Skin): 20-30 minutes at 77° F (25° C), 50% RH. Higher tempera- tures and humidity will shorten this time.

Shelf Life: 12 months in original unopened cartridges (9 months in bulk containers) when stored at temperatures lower than 80° F (27°C).

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