• Description for Bostik GPS1

    A one-component, moisture curing urethane sealant.

    *See Terms of Use Below

    Application Type Seal
    1 Part or 2 Part 1-Part
    Material Form Paste
    Substrate Anodized aluminum, Vinyl, Porous substrates, Metal, Galvanized steel, Stone, Wood, Concrete, Dissimilar materials, Galvanized steel
    Manufacturer Bostik
    Chemistry water-free, Urethane, PVC, Polyurethane
    Cure Method Moisture
    Cure Temperature (°C) 25
    Cure Time (min) 20,160
    Viscosity (cPs) Non-sag
    Color Black, Limestone, Stone, White, Bronze, Light Gray
    High Temperature Resistance (°C) 65
    Low Temperature Resistance (°C) -40
    Key Specifications ASTM (American Standard Test Method): C920: ASTM C920, TYPE S, GRADE NS, CLASS 25, USE NT, A AND M
  • Technical Data for Bostik GPS1

    • Application Type
    • 1 Part or 2 Part
      • 1-Part
    • Material Form
      • Paste
    • Substrate
      • Porous Substrates
      • Concrete
      • Dissimilar Substrates - Dissimilar materials
      • Metal
      • Galvanized - Galvanized steel
      • Vinyl
      • Wood
      • Anodized Aluminum
      • Galvanized Steel
      • Stone
      • Other - Cedar, Fiber-cement board
    • Industry
      • Construction - General purpose sealing of dissimilar building materials, Masonry
      • Other - Indoor and outdoor applications, Roof penetrations, Soffit / Fascia sealing, Sealing roofing materials such as metal flashing, gutters, downspouts, roof tile and non-asphalt shingle, Critical vertical applications
    • Chemistry
    • Cure Method
      • Moisture / Condensation Cure - Moisture
    • Color
      • Black
      • Brown - Limestone
      • Gray - Stone, Light Gray
      • White
      • Yellow - Bronze
    • Key Specifications
      • ASTM (American Standard Test Method) : C920 : Class 25 - ASTM C920, TYPE S, GRADE NS, CLASS 25, USE NT, A AND M
    Cure Specs
    Cure Temperature (°C) 25
    Cure Time (min) 20,160
    Viscosity (cPs) Non-sag
    Tack Free Time (min) 60 Test Method
    Bond Strength
    Tensile Strength (psi) 135 Test Method
    Material Resistance
    High Temperature Resistance (°C) 65
    Low Temperature Resistance (°C) -40
    Shore A Hardness 35 Test Method
    Elongation (%) 550 Test Method
    Flexibility Flexible
    Other Properties
    Flash Point (°F) 143.6
    Business Information
    Shelf Life (mon) 9
    Not Good For
    Don't Use For damp, contaminated, loose surfaces, seal narrow joints, fillet joints and face nail holes, horizontal joints or traffic-bearing joints where abrasion resistance is required (walkways, driveways, runways, etc.), glazing applications
    Don't Use With marble, limestone, granite
  • Best Practices for Bostik GPS1

    *See Terms of Use Below

    1. Clean-Up

      After dry-wiping uncured sealant from substrates and tools, remaining uncured sealant can be removed by using Xylene, Toluene or similar aromatic solvents. Please refer to the MSDS’s provided for these solvents before use. Bostik® Hand Towel and Specialty Sealant Remover can also remove uncured sealant. Cured sealant is usually very difficult to remove without altering or damaging the surface to which the sealant has been misapplied. Cured sealant can be removed by abrasion or other mechanical means (scrapers, putty knives).

    2. Testing

      A hand pull test must be run before the job starts and at regular intervals during the job. It must be run on the job site after the sealant is fully cured, usually within 7 to 21 days. (Adhesion may develop fully after at least 14 days.)

      The hand pull test procedure is as follows: Make a knife cut horizontally from one side of the joint to the other.

      Make two vertical cuts approximately two inches long, at the sides of the joint, meeting the horizontal cut at the top of the two-inch cuts.

      Grasp the two-inch piece of sealant firmly between the fingers and pull down at a 90° angle or more, and try to pull the uncut sealant out of the joint.

      If adhesion is sufficient, the sealant should tear cohesively in itself.

      Sealant may be replaced by applying more sealant in the same manner as it was originally applied. Care should be taken to ensure that the new sealant is in contact with the original, and that the original sealant surfaces are clean, so that a proper bond between the new and old sealant will be obtained.

    3. Removal

      If the sealant becomes damaged, replace the damaged portion by removing the old sealant completely, cleaning the surfaces and reapplying a fresh and appropriate amount of new sealant in accordance with the directions and information contained in this data sheet.

  • Comparable Materials for Bostik GPS1

    *See Terms of Use Below

    Spec Engine® Results

Popular Articles

What are the Types of Adhesive Sealants? An In-Depth Q&A

Read Article

Testing the effectiveness of surface treatments

Read Article

Infographic: ENSURING A STRONG BOND - 6 Basic Methods of Surface Preparation

Read Article

Q&A Tutorial on the Adhesive Sealant Selection Process

Read Article

Sponsored Articles

Unique Advantages of Contact Adhesives

Read Article

Using LOCTITE® 454™ is a Valid Option for Engineers Working with a Wide Variety of Materials

Read Article

Sylgard 184 by DOW is the Top Choice for a Transparent, Silicone Encapsulant. Read Why:

Read Article

Case Study: Creating reliable, corrosion-free bonds with LORD® 406 acrylic adhesive

Read Article

Featured Ads

Top Catalog Pages for Bostik GPS1

Gluespec Poll

What level of expertise do you have in specialty chemicals like adhesives, sealants, conformal coatings, etc.?
Tack Free Time Test Methods
Tack Free Time Test Method
60 min Bostik Test, ambient conditions
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Cure Humidity Test Method
135 psi 20,160 min 25°C 1 % ASTM D 412, After 14 days cure at 77°F and 50% RH, @ break
Elongation Test Methods
Elongation Test Method
550 % Break, After 14 days cure at 77°F and 50% RH, ASTM D 412
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method
35 After 14 days cure at 77°F and 50% RH, ASTM D 2240