XtraBond®450 - Premium Grade Silicone Sealant

XtraBond®450 is a one component, non-sag, permanently flexible neutral cure silicone sealant. Manufactured for excellent adhesion to vinyl, glass, aluminum, wood, sheet metal and most common building materials without the need of a primer, XtraBond®450 cures rapidly when exposed to atmospheric moisture to form a durable tight bond.


  • Window & Door Applications
  • Glass Replacement
  • Industrial Applications
  • Copper Sheet Metal Applications

XtraBond450 is widely used on many applications and in various industries.


  • AAMA Approved
  • Excellent Adhesion to Glass
  • Window & Door Approved
  • Non-Sag & Slump
  • 75 Year Durability
  • Quick Curing
  • Excellent UV Resistance
  • Non-Yellowing
  • Consistent Gunablility & Tooling

Additional Applications:

XtraBond®450 is also compatible with the following materials and substrates: Kynar 500/Hylar 5000, Mica Fluropon, Metallic Fluropon, and Weather X Siliconized Modified Polyester (SMP).


AAMA 808.3-92 ASTM C-920, Type S, Grade NS, Class 25, Use NT, M, G, A,O and TT-S-00230C

Technical Specs

Skin Time 10 minutes
Tack Free Time 20 minutes
Cure Rate 1/4 " Bead / 24 Hours
VOC 28.08 g/L (2.7 %)
Elongation @ Break 550%
Hardness (shore A) 20 +/- 5
Movement +/- 25%
Peel Strength 19 psi
Bond Durability on Glass/Vinyl/Alumimum 25%
Tensile Strength 255 psi
Staining None
UV Resistance Excellent
Service Temperature -40 deg. F to 350 deg.



This product is available in the following colors:

  • Almond
  • Aluminum Stone
  • Beige
  • Black
  • Bronze
  • Clear
  • Desert Tan
  • Translucent
  • White


The XB450 is available for the following industries

Packaging & Pictures

drum pail tube This product is available in the following configurations:

  • 10.1 oz cartridges: Twist-On Nozzles
  • 4.5 gal in a 5 gal pail
  • 52 gal in a 55 gallon drum

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.