General Comments on Bonding of Elastomers

Polychloroprene, nitrile, natural rubber, styrene butadiene rubber and butyl rubber can all be readily bonded with cyanoacrylates. EPDM and fluoroelastomers (such as Viton) can also be bonded, although only with specific grades of cyanoacrylate. The silicone rubbers and thermoplastic elastomers will usually require a primer but will also bond with cyanoacrylates. 

Cyanoacrylates are relatively rigid adhesives and so may not be suitable in some applications where a high degree of flexibility is required. The toughened cyanoacrylates do show improved flexibility bnt are a little slower curing and sometimes 

Notes All shear strengths are given as guidelines only and may vary considerably depending on grade of rubber, fillers, surface finish, etc. 

therefore, a high degree of flexibility is required at higher temperatures then a two-part acrylic- or silicone-based product may be more suitable. 

Handbook of Rubber Bonding, Ed., B. Crowther, Rapra Technology Ltd, Shrewsbury, UK, 2000. 

---