GoBoard® Pro Sealant 10.3oz

SKU: GBRD-PRO-SEALANT-10.3OZ
GoBoard Pro Sealant 10.3oz - Waterproof Sealant Product

GoBoard® Pro Sealant 10.3oz

SKU: GBRD-PRO-SEALANT-10.3OZ
Regular price $15.84 Sale price $10.91 Save $4.93
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GoBoard® Pro Sealant 10.3oz is a high-performance, moisture-curing waterproof sealant designed for professional contractors and tile installers. This flexible tile sealant provides strong adhesion to GoBoard® panels and a wide range of building materials, ensuring reliable joint waterproofing and fastener protection. With its low odor and environmentally friendly formula, GoBoard® Pro Sealant supports efficient indoor and outdoor tile installations while meeting ASTM and ANSI waterproofing standards.

Key Features of GoBoard® Pro Sealant

  • Easy Dispensing: Compatible with standard caulk guns and works in various temperatures for versatile job site application.
  • No Sag Formula: Applies cleanly on vertical and horizontal surfaces without dripping or sagging.
  • Dual Functionality: Acts as a durable sealant and adhesive for GoBoard® and other substrates in interior and exterior tile projects.
  • Fast Skin Over: Allows same-day tile installation to speed up project timelines.
  • Flexible Movement: Accommodates up to 25% joint movement for long-lasting durability.
  • Weather Resistant: Provides long-term resistance against weathering and UV exposure.
  • Wide Bonding Range: Bonds effectively to metals, plastics, concrete, wood, foam, and ceramics.
  • Paintable & Non-Yellowing: Maintains finish quality without discoloration over time.
  • Environmentally Friendly: Low VOC, solvent-free, non-corrosive, and low odor for safer use.
  • Industry Certified: Meets ASTM C920, Type S, Grade NS, Class 25 or better standards for professional applications.

GoBoard® Pro Sealant Specifications

Specification Details
Color White
Solids 100%
Density 13.4 lbs/gal
Extrusion Rate (ASTM C1183) 110 g/min
Tack Free Time (@77˚F/50% RH) 15 min
Allowable Joint Movement (ASTM C719) 25%
Hardness, Shore A (C661) 55
Tensile Strength (D412) TB 1.98 MPa, EB 250%
24 Hour Cure Depth (77°F/50% RH) 3 mm
UV-A Rating (G53) 10,000 hrs
Temperature Resistance 250°F
Cartridge Volume 10.3 oz / 306.4 ml

Usage/Application Tips for GoBoard® Pro Sealant

For waterproof GoBoard® tile installations, apply GoBoard® Pro Sealant generously to all joints and fastener penetrations. Fill 1/8” gaps fully and spread excess sealant at least 1 inch beyond edges to create a watertight substrate that complies with ANSI A118.10 standards.

Warranty & Reliability

Johns Manville guarantees GoBoard® Pro Sealant meets all stated specifications when used with GoBoard® installations, ensuring reliable waterproof protection and adhesion.

Choose GoBoard® Pro Sealant 10.3oz for a durable, flexible, and fast-curing waterproof sealant that enhances your tile installation projects. Order now to improve your workflow and installation quality.


Frequently Asked Questions

What is GoBoard® Pro Sealant 10.3oz?
GoBoard® Pro Sealant 10.3oz is a moisture-curing waterproof sealant designed for professional contractors and tile installers. It provides strong adhesion to GoBoard® panels and a wide range of building materials, ensuring reliable joint waterproofing and fastener protection.
Which standards does it meet?
It meets ASTM C920, Type S, Grade NS, Class 25 or better, and complies with ANSI A118.10 for waterproofing in tile installations.
What are its key performance specs?
  • Tack free time at 77°F/50% RH: 15 minutes
  • Allowable joint movement: 25%
  • UV-A resistance (G53): 10,000 hours
  • Temperature resistance up to 250°F
  • 24-hour cure depth at 77°F/50% RH: 3 mm
  • Extrusion rate (ASTM C1183): 110 g/min
  • Tensile strength (D412): 1.98 MPa, elongation 250%
  • What substrates will it bond to?
    It bonds effectively to GoBoard® panels as well as metals, plastics, concrete, wood, foam, and ceramic tile.
    How much sealant does the cartridge hold?
    The cartridge volume is 10.3 oz (306.4 ml).
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