PERMABOND® PT321 Polyurethane Adhesive

PERMABOND® PT321 is a 2-part, room temperature curing polyurethane adhesive. It is ideal for use on a wide variety of substrate materials including metals, plastics and composites.

FOR INDUSTRIAL USE ONLY

FEATURES AND BENEFITS

Adhesion to a wide variety of substrates
Cures at room temperature
Easy 1:1 mix ratio
Good resistance to impact and vibration
Thixotropic, non-slump rheology

Physical Properties of Uncured Adhesive

	PT321 A	PT321 B
Chemical composition	Polyurethane	Isocyanate
Appearance	Black	Cream
Viscosity @ 25°C	4000-8000 mPa.s *(cP)* Thixotropic	3000-6000 mPa.s *(cP)* Thixotropic
Specific Gravity	1.25	1.45

Typical Curing Properties

Ratio of use	1 : 1 by volume
Maximum gap fill	5 mm *(0.2 in)*
Pot life	60-90 seconds
Handling time (steel) ISO4587 (0.3 N/mm² shear strength is achieved)	10-15 minutes
Full cure	@23°C: 24 hours @90°C: 30 minutes

Typical Performance of Cured Adhesive

Shear strength* (ISO4587)	Zinc: 6-8 MPa *(900 -1200 psi)* Steel: 18-25 MPa *(2600 -3600 psi)* Carbon fibre: 6-8 MPa *(900 -1200 psi)*
Tensile strength (ISO37)	20-25 MPa *(2900-3600 psi)*
Elongation at break (ISO37)	<10%
Hardness (ISO868)	70-80 Shore D
Coefficient of thermal expansion (ASTM D- 696)	85 x 10-6 1/K

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