Adhesives in construction: Dextrin is best classified as which type of glue or adhesive?

Introduction / Context:Dextrin is widely used in paper packaging, labelling, and light carton sealing. For civil engineers and architects, knowing adhesive categories helps in specifying safe, economical products for non-structural applications such as tiles, packaging, or temporary fixtures.

Given Data / Assumptions:

• Dextrin is produced by partial hydrolysis of starch.
• Applications are typically light-duty and water-soluble.
• We are not discussing structural epoxies or construction mastics here.

Concept / Approach:Dextrin solutions form film-forming starch glues. They are plant-based, economical, and suitable where high strength or water resistance is not essential. This differentiates them from animal glues (collagen-based), albumin glues (protein from blood/egg), and rubber-based contact adhesives.

Step-by-Step Solution:Identify origin: dextrin from starch → polysaccharide fragments.Match to category: starch glue family.Exclude other types: animal or albumin glues are protein-based; rubber adhesives are solvent-borne elastomer systems.Hence, the answer is “Starch glue (dextrin from starch).”

Verification / Alternative check:Material data sheets list dextrin glues as water-soluble starch-based adhesives.

Why Other Options Are Wrong:Animal/albumin glues differ in chemistry and performance (setting, moisture resistance).Rubber adhesives provide different bonding mechanisms and solvent handling.

Common Pitfalls:Expecting high water resistance from dextrin; it is intended for dry-service light bonds.

Final Answer:Starch glue (dextrin from starch)