Comparison

Hot melt vs Contact adhesive: which should you use?

Both stick awkward materials fast. Hot melt is instant and weak; contact adhesive is permanent and strong.

The short answer

Hot melt for speed, gap filling and reversibility on light work. Contact adhesive whenever the bond has to carry load or last.

Side by side

	Contact adhesive	Hot melt, hot glue
Strength	Medium	Medium
Flexibility	Flexible	Flexible
Gap filling	None	Medium
Water resistance	Water resistant	Not established
UV resistance	Not established	Poor
How it cures	Solvent evaporation	Hot melt
Clarity	Varies	Varies
Typical working time	10 to 30 minutes open time	5 to 60 seconds
Typical full cure	24 to 72 hours	When fully cool
Maximum temperature	70C	60C
Needs clamping	No	No
Two part	No	No
Removable later	No	No

Highlighted rows are where the two genuinely differ. These describe the families in general, not any particular product, so check the datasheet of whatever you buy.

Choose Contact adhesive when

Prototyping, packaging, crafts, temporary fixings, filling a gap while holding something. Anything you may want to remove. Small areas where heat is easy to apply.

Choose Hot melt, hot glue when

Laminate, veneer, leather, rubber, foam to board. Large flat areas. Anything permanent and load bearing. Anywhere that might get warm, which hot melt cannot survive.

What actually separates them

Hot melt cools rather than cures, so it is instant, thick, rubbery and heat sensitive: a warm car or a radiator will release it. Contact adhesive dries and stays dried, holds far more, and gives you exactly one chance to place the part.

Contact adhesive

The full guide: what it is for, where it fails, and which materials it suits.

Hot melt, hot glue