Premier XtraBond 250 Anti-Microbial Acetoxy Silicone Sealants

Professional-grade 100% silicone sealants engineered to deliver superior adhesion, permanent flexibility, and long-lasting mildew-resistant performance in demanding commercial, industrial, and residential applications.

Looking for a Premium Food-Grade Silicone Sealant for Kitchens, Bathrooms, and Cultured Marble?

Premier Building Solutions XtraBond 250 Anti-Microbial Acetoxy Silicone Sealants are one-component, 100% acetoxy-based silicone sealants formulated for applications that require exceptional durability, waterproof performance, and permanent flexibility. Designed with an anti-microbial, mildew-resistant formula, XtraBond 250 creates long-lasting seals that resist moisture while maintaining excellent adhesion to a wide variety of building materials.

NSF approved and FDA compliant for incidental food contact, XtraBond 250 is an excellent choice for cultured marble installations, commercial kitchens, bathrooms, walk-in coolers, freezers, industrial facilities, marine environments, and other high-moisture areas. The non-sag formula offers consistent gunning and tooling characteristics, making installation fast, clean, and professional.

Available in multiple colors, XtraBond 250 allows contractors and installers to achieve both outstanding sealing performance and an attractive finished appearance across a variety of residential and commercial projects.

Typical Applications

• Walk-in coolers
• Commercial freezers
• Cultured marble installations
• Kitchens
• Bathrooms
• Countertops
• Backsplashes
• Industrial facilities
• Marine environments
• Food preparation areas

Advantages

• 100% acetoxy silicone formulation
• Anti-microbial, mildew-resistant protection
• Permanent flexibility after curing
• Excellent adhesion to a wide variety of substrates
• Non-sag formulation for vertical applications
• Consistent gunning and tooling characteristics
• Approved for cultured marble installations
• NSF Standard 51 approved for direct food contact
• FDA compliant for incidental food contact
• Outstanding temperature resistance from -76°F to 450°F
• Available in multiple colors to match a variety of applications
• 18-month shelf life when properly stored

Specifications

• Brand: Premier Building Solutions
• Product: XtraBond 250 Anti-Microbial Acetoxy Silicone Sealant
• Sealant Type: 100% Acetoxy Silicone
• Container Size: 10.1 fl. oz. Cartridge
• Paintable: No
• Tack-Free Time: 20 Minutes
• Skin Time: 12 Minutes
• Cure Rate: 1/4" Bead Per 24 Hours
• Movement Capability: ±25%
• Elongation at Break: 550%
• Tensile Strength: 205 PSI
• Shore A Hardness: 20 ±5
• Shrinkage: 4%
• Application Temperature: -31°F to 149°F
• Service Temperature: -76°F to 450°F
• VOC Content: 2.97%
• Shelf Life: 18 Months

Compatible Materials

• Cultured marble
• Glass
• Ceramic tile
• Porcelain
• Aluminum
• Stainless steel
• Many common construction materials

Industry Certifications

• ASTM C920, Type S, Grade NS, Class 25
• FDA Regulation 21 CFR 177.2600 (Incidental Food Contact)
• NSF Standard 51 (Direct Food Contact)
• UL Recognized (QMFZ2)
• California Air Resources Board VOC Compliant
• TT-S-01543A Class A
• TT-S-00230C
• CAN/CGSB-19.13-M87
• MIL-A-6106A

Applications

• Commercial kitchen installations
• Food processing facilities
• Bathroom remodeling
• Cultured marble installations
• Countertop sealing
• Walk-in cooler construction
• Industrial maintenance
• Marine sealing

Why Choose Premier XtraBond 250?

Premier XtraBond 250 combines the proven performance of a true 100% silicone sealant with an advanced anti-microbial formula that helps resist mildew growth in high-humidity environments. Its permanent flexibility, outstanding adhesion, and broad temperature resistance make it an ideal solution for demanding sealing applications where long-term durability is essential.

Trusted by contractors, countertop installers, fabricators, and maintenance professionals, XtraBond 250 delivers consistent application, excellent tooling characteristics, and dependable waterproof performance across residential, commercial, industrial, and marine environments.

BB Industries carries Premier Building Solutions sealants, silicone adhesives, countertop installation supplies, stone fabrication products, and professional construction materials trusted by contractors and fabricators throughout North America.

BB Industries has you covered!

Frequently Asked Questions

Where can XtraBond 250 be used?

It is designed for kitchens, bathrooms, cultured marble installations, walk-in coolers, freezers, food preparation areas, industrial facilities, marine environments, and other applications requiring a durable waterproof silicone seal.

Is XtraBond 250 approved for food-related applications?

Yes. It complies with FDA regulations for incidental food contact and is NSF Standard 51 approved for direct food contact applications.

Can this silicone sealant be painted?

No. XtraBond 250 is a 100% silicone sealant and is not paintable after curing.

How flexible is the cured sealant?

It offers ±25% movement capability with 550% elongation at break, allowing it to accommodate normal expansion and contraction while maintaining a durable seal.

What colors are available?

Premier XtraBond 250 Anti-Microbial Acetoxy Silicone Sealants are available in multiple colors to complement a variety of surfaces and installation requirements.