APP 820 is a high-performance structural epoxy adhesive. It has very high strength and is impact-toughened, ideal for applications that require a very high-strength structural adhesive to withstand light impact and small vibrations.

Specifications

Chemistry	Part A: Epoxy; Part B: Hardener
Colour	Part A: White; Part B: Black; Mixed: Grey
Mix ratio by volume	2:1
Working time	15 – 20 minutes
Handling time (>0.3 MPa overlap shear strength)	3 – 4 hours
Time to reach full strength	7 days
Tensile strength at break (ASTM D638)	35.0 MPa
E-Modulus (ASTM D638)	950 MPa
Overlap shear strength, grit-blasted aluminium (ISO 4587)	35.0 MPa
Volumes available	50 ml, 200 ml, 400 ml cartridges; bulk

How to use

• Surface preparation affects strength: for example, on aluminium, IPA wiped 10.5 MPa, abraded (120 grit) 28.5 MPa, grit blasted 35.0 MPa (overlap shear, ISO 4587).

Typical applications

• Structural applications requiring a very high-strength structural adhesive with good chemical and weathering resistance
• Structural applications requiring fast strength build-up and full strength in 24 hours