sealant.

A substance applied to gaps or surfaces to prevent passage of fluids or other material.

Use it for

Words that belong together

• apply sealant
• silicone sealant
• a bead of sealant

On the page

She laid a bead of sealant along the repaired seam.

The sealant cured, but the cracked panel still needed structural support.

Usage notes

Primary category: sci-fi. Forms: Usually uncountable. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.