ASTM C1115-17(2022) PDF

Overview

ASTM C1115-17(2022), Standard Specification for Dense Elastomeric Silicone Rubber Gaskets and Accessories, provides comprehensive requirements for products made from dense elastomeric silicone rubber. These components are primarily intended for use in sealing and glazing applications within building construction, including gaskets, setting blocks, spacers, and shims. The standard specifies material quality, classification, performance requirements, and testing methods to ensure reliable and consistent performance in building envelopes and structural glazing systems.

Key Topics

• Product Classification: Products are classified by:

  • Type: Tear resistant (Type T) and compression set resistant (Type C)
  • Hardness: Various grades based on durometer hardness, typically measured on a Type A scale
  • Class: Based on flame propagation resistance (Class F indicates resistance is required)
  • Surface Condition: Ranges from smooth and non-adhesive to sealants, to surfaces designed to promote adhesive bonding

• Material Quality Requirements:

  • Must use virgin silicone polymer, free of visible internal porosity, surface defects, and dimensional irregularities
  • Standard color is black, except when otherwise specified
  • Surfaces must be smooth, clean, and free from contaminants

• Testing and Performance: The standard outlines rigorous test methods and performance criteria, covering:

  • Low Temperature Flexibility
  • Durometer Hardness
  • Compression Set Resistance
  • Tensile Strength and Ultimate Elongation
  • Heat Aging and Ozone Resistance
  • Tear Strength
  • Flame Propagation
  • Specific Gravity
  • Staining and Color
  • Testing follows referenced ASTM methods to ensure uniformity and reliability

• Packaging, Marking, and Traceability:

  • Finished products must be properly packed, labeled, and, if required, marked with the manufacturer and order details
  • Packaging must protect components from damage during shipping and storage

Applications

Products conforming to ASTM C1115 are essential in a variety of building construction sealing and glazing scenarios, including:

• Compression Sealing Systems: Used between mechanically restrained surfaces for airtight and watertight performance in building facades and window assemblies

• Structural Silicone Sealant Glazing: Serve as critical accessories-such as edge spacers and setting blocks-contributing to the structural integrity and weather resistance of curtain walls and glass assemblies

• Preformed Gasket Solutions: Ideal for pre-manufactured, ready-to-install seals in both new construction and retrofit projects, ensuring consistent material quality and performance

• Accessories (Spacers, Shims, Setting Blocks): Designed to support, cushion, or separate materials, these accessories help maintain dimensional tolerances and prevent glass-to-metal contact

Related Standards

Several referenced standards provide test methods and terminology used within ASTM C1115:

• ASTM C717: Terminology of Building Seals and Sealants
• ASTM C1087: Compatibility testing for sealants with glazing accessories
• ASTM C1166: Test Method for Flame Propagation of Dense and Cellular Elastomeric Gaskets and Accessories
• ASTM D395, D412, D573, D624, D792, D925, D1149, D2137, D2240, D3182: Various test methods covering compression set, tensile properties, heat aging, tear strength, specific gravity, staining, ozone resistance, brittleness, and hardness
• RMA Handbook: Reference for rubber manufacturing standards

Practical Value

Compliance with ASTM C1115-17(2022) ensures that dense elastomeric silicone rubber gaskets and accessories meet stringent material and performance requirements. This is crucial for architects, contractors, and manufacturers seeking durable, reliable sealing solutions in demanding construction environments. Adhering to this standard helps improve building performance, energy efficiency, safety, and longevity of structural glazing and sealing applications while supporting international best practices and regulatory compliance in the industry.

Keywords: dense silicone gasket, elastomeric rubber seal, building construction glazing, ASTM C1115, sealing accessories, compression seal, structural glazing, tear resistant silicone, flame propagation resistant gasket.