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About Structural Adhesives
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Compare epoxy, acrylic, and urethane adhesive options. Then learn about adhesive performance measures and best practices to create a strong bond.
Epoxy Structural Adhesives
 |
Stick |
Epoxies are the strongest and most chemical-resistant structural adhesives. They bond especially well on metal.
These adhesives come in two parts that need to be mixed. The container size listed is the combined total of the two parts.
7524A161 is solvent free. If the adhesive hardens in the tube, soften in warm water before dispensing.
Putty—Slice off a chunk and mold it into the shape you need.
Strength | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mfr. Model No. | Container Type | Begins to Harden, min. | Reaches Full Strength, hr. | Shear, psi | Peel | Consistency | Viscosity | Temp. Range, ° F | For Joining | Each | |||
J-B Weld | |||||||||||||
HighHeat | |||||||||||||
| 8297 | Stick | 60 | 8 | 900 | Not Rated | Putty | Not Rated | -20 to 450 | Composite, Masonry, Metal, Plastic, Rubber | 7605A3 | 000000 | ||
PlasticWeld | |||||||||||||
| 8237 | Stick | 20 | 24 | 900 | Not Rated | Putty | Not Rated | -20 to 300 | Composite, Masonry, Plastic, Rubber | 7605A1 | 0000 | ||
Slow-Set Epoxy Structural Adhesives
 |
Syringe |
Take your time positioning parts—these epoxies remain adjustable for at least 90 minutes before setting. Epoxies are the strongest and most chemical-resistant structural adhesives. They bond especially well on metal.
These adhesives come in two parts that need to be mixed. The container size listed is the combined total of the two parts.
Paste—Thicker than liquid adhesives but still spreadable—good for filling gaps and covering surfaces.
Container | Strength | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden, hr. | Reaches Full Strength, hr. | Shear, psi | Peel | Mix Ratio | Consistency | Viscosity, cP | For Joining | Each | |||
J-B Weld | ||||||||||||||
Original | ||||||||||||||
| 50165 | 0.85 | Syringe | 4 | 24 | 1,800 | Not Rated | 1:1 | Paste | 150,000 | Composite, Glass, Masonry, Metal, Plastic, Rubber | 7605A4 | 00000 | ||
Urethane Structural Adhesives
|
Syringe |
Urethanes are the most flexible adhesives, so they bond dissimilar materials and damp vibration.
Some of these adhesives come in two parts that need to be mixed. The container size listed is the combined total of the two parts.
Thick Liquid—Flow into narrower gaps than gels and pastes, but thick enough to stay put on uneven surfaces.
Container | Strength | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden, min. | Reaches Full Strength, hr. | Shear, psi | Peel | Mix Ratio | Consistency | Viscosity, cP | Temp. Range, ° F | For Joining | Each | |||
J-B Weld | |||||||||||||||
Plastic Bonder | |||||||||||||||
| 50139 | 0.85 | Syringe | 6 | 1 | 1,000 | Not Rated | 1:1 | Thick Liquid | 50,000 | -20 to 250 | Composite, Masonry, Metal, Plastic, Rubber, Wood, Metal to Composite, Metal to Plastic, Metal to Rubber, Plastic to Composite, Plastic to Masonry, Plastic to Rubber, Rubber to Composite, Rubber to Masonry | 7605A6 | 00000 | ||
Quick-Set Epoxy Structural Adhesives
|
Syringe |
For quick repairs, these epoxies begin to harden in six minutes or less. Epoxies are the strongest and most chemical-resistant structural adhesives. They bond especially well on metal.
These adhesives come in two parts that need to be mixed. The container size listed is the combined total of the two parts.
Thick Liquid—Flow into narrower gaps than gels and pastes, but thick enough to stay put on uneven surfaces.
Container | Strength | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden, min. | Reaches Full Strength, min. | Shear, psi | Peel | Mix Ratio | Consistency | Viscosity, cP | Temp. Range, ° F | For Joining | Each | |||
J-B Weld | |||||||||||||||
PlasticWeld | |||||||||||||||
| 50132 | 0.85 | Syringe | 5 | 60 | 2,000 | Not Rated | 1:1 | Thick Liquid | 9,000 | -20 to 300 | Composite, Masonry, Metal, Plastic, Rubber, Wood | 7605A5 | 00000 | ||
