XtraBond®150 - Premium Grade Silicone Sealant

XtraBond® 150 is a one component, permanently flexible, RTV Mildew resistant silicone sealant. Manufactured for excellent adhesion to cultured marble, tile, glass, vinyl, aluminum, and sheet metal without the need of a primer. XtraBond® 150 cures rapidly when exposed to atmospheric moisture to form a durable tight bond.


  • Cultured Marble Applications
  • Window & Door Applications
  • Glass Replacement
  • Kitchen & Bath
  • Industrial Applications


  • Approved for Cultured Marble
  • Excellent adhesion to Glass
  • Window & Door Approved
  • Non-Sag & Slump
  • 50 Year Durability
  • Quick Curing
  • Consistent Gunablility & Tooling


ASTM C-920, Type S, Grade NS, Class 25, Use NT, M, G, A, O; TT-S-00230C & TT-S-001534A (COM-NBS)

Technical Specs

Skin Time 12 Minutes
Tack Free Time 20 Minutes
Cure Rate 1/4 " Bead / 24 Hours
VOC 3.47 %
Elongation @ Break 550%
Hardness (shore A) 20 +/- 5
Movement +/- 25%
Peel Strength 19 psi
Bond Durability on Glass/Vinyl/Alumimum 25%
Tensile Strength 375 psi
Staining None
UV Resistance Excellent
Service Temperature -40 deg. F to 450 deg. F



This product is offered in hundreds of colors using our Custom Color Matching & Mixing System.

For current color offerings, please visit the Online Color Matching Program.

NOTE: This product also qualifies for our Private Label Program.


The XB150 is available for the following industries

pail tubePackaging & Pictures

This product is available in the following configurations:

  • 10.1 oz cartridges: Twist-On Nozzles
  • 4.5 gal in a 5 gal pail

Other packaging is available upon request

Limited Lifetime Warranty

This product is guaranteed to give satisfactory performance if applied in accordance with the label directions. Liability to Premier Industrial Supply, Inc. (Premier) is limited to a full refund of the purchase price or product replacement if product is proven defective. Premier shall not be liable for loss or damage, whether direct, consequential or incidental. There are no other warranties expressed or implied including the implied warranty of merchantability or fitness for a particular purpose.