Glazing sealant

A field- or factory-applied material used to seal glazing joints and, only when specifically designed and approved, to provide structural attachment.

Meaning and boundaries

Weather sealant, IGU edge sealant, and structural silicone have different functions and must not be treated as interchangeable.

Why it matters in glass restoration

Cleaning chemicals, slurry, abrasion, heat, and masking can affect adhesion, appearance, cure, or compatibility at the glass perimeter.

Related terms

• Structural silicone glazing
• Primary IGU sealant
• Secondary IGU sealant

References

• ASTM International — C1193 — Standard Guide for Use of Joint Sealants
  Publisher’s original source
• ASTM International — C1401 — Standard Guide for Structural Sealant Glazing
  Publisher’s original source
• ASTM International — C1249 — Standard Guide for Secondary Seal for Sealed IGUs in Structural Sealant Glazing
  Publisher’s original source