Xtrabond 150 RTV Silicone – Clear

The professional-grade RTV silicone trusted by stone fabricators for countertop installations, sink installations, and long-lasting waterproof seals.

Looking for a Reliable Silicone Sealant for Stone Countertops?

Xtrabond 150 RTV Silicone Clear is a premium one-component, permanently flexible, 100% RTV silicone sealant designed specifically for the stone fabrication and construction industries. Engineered to provide exceptional adhesion without a primer, Xtrabond 150 bonds securely to granite, marble, quartz, tile, glass, cultured marble, vinyl, aluminum, and sheet metal, making it one of the most versatile sealants in any fabrication shop or installation truck.

Its non-sagging formula stays exactly where it's applied, making it ideal for vertical seams, undermount sink installations, backsplash joints, faucet bases, showers, tubs, and countless other sealing applications. Combined with its mildew-resistant formulation, fast room-temperature cure, and excellent chemical resistance, Xtrabond 150 provides durable, long-lasting seals that professionals can trust.

Whether you're fabricating countertops in the shop or completing an installation on-site, Xtrabond 150 RTV Silicone delivers the performance and reliability today's fabricators demand.

What Fabricators Use Xtrabond 150 RTV Silicone For

• Undermount sink installations
• Granite countertop sealing
• Quartz countertop installations
• Backsplash joints
• Faucet base sealing
• Countertop-to-wall transitions
• Shower and tub surrounds
• General waterproof sealing applications

Advantages

• Excellent adhesion to granite, marble, quartz, tile, glass, and cultured marble
• 100% RTV silicone formulation
• Non-sagging, non-slumping consistency for vertical applications
• Low-VOC formula
• Mildew-resistant for wet environments
• No primer required on most surfaces
• Fast room-temperature curing
• Outstanding chemical resistance
• Permanent flexibility for long-lasting seals
• Ideal for kitchens, bathrooms, and commercial installations

Specifications

• Size: 10.1 fl. oz. Tube
• Formula: 100% RTV Silicone
• Color: Clear
• Cure Type: Room Temperature Vulcanizing (RTV)
• VOC: Low VOC
• Application: Interior & Exterior

Compatible Materials

• Granite
• Quartz
• Marble
• Cultured marble
• Tile
• Glass
• Vinyl
• Aluminum
• Sheet metal

Common Applications

• Undermount sink to granite or quartz countertop perimeter seals
• Backsplash to countertop joints
• Faucet base sealing
• Shower and tub surrounds
• Countertop-to-wall transitions
• General waterproof sealing around stone installations

Why Choose Xtrabond 150 RTV Silicone?

Professional countertop installations require a sealant that bonds quickly, remains permanently flexible, and performs reliably in wet environments. Xtrabond 150 combines excellent adhesion, mildew resistance, chemical durability, and a non-slumping formula into one easy-to-use silicone that's ideal for fabrication shops and installers alike.

Unlike many general-purpose silicones, Xtrabond 150 was formulated with the stone industry in mind, providing dependable adhesion to a wide variety of countertop materials without requiring a primer. Its fast-curing RTV formulation helps speed installation while delivering durable, waterproof seals that stand the test of time.

Looking for another color? Xtrabond 150 is also available in Translucent and White.

Browse our complete selection of Caulk & Sealants for additional colors and specialty sealants, or explore Xtrabond 50 Acrylic Latex Sealant for paintable sealing applications.

BB Industries has you covered!

Frequently Asked Questions

What surfaces does Xtrabond 150 adhere to?

Xtrabond 150 bonds to granite, quartz, marble, cultured marble, tile, glass, vinyl, aluminum, sheet metal, and many other common construction materials without requiring a primer on most surfaces.

Can it be used for undermount sink installations?

Yes. It is an excellent choice for sealing undermount sinks to granite or quartz countertops because it provides a strong, flexible, and waterproof seal.

Is Xtrabond 150 suitable for wet environments?

Yes. Its mildew-resistant formulation makes it ideal for sinks, showers, tubs, backsplashes, and other moisture-prone applications.

Does this silicone sag on vertical joints?

No. The non-sagging, non-slumping formula stays in place, making it ideal for vertical seams and backsplash installations.

Is there a paintable version available?

If you need a paintable sealant, consider Xtrabond 50 Acrylic Latex Sealant, which is designed for applications where painting after curing is desired.