Silicone Sealant & Bonding applications

Portlight hatch sealAdhesives require certain properties, good adhesion to a required substrate, physical strength to avoid cohesive failure, resistance to environmental conditions and the ability to maintain these properties over a given lifetime.

A sealant on the other hand may only require limited adhesion, with little physical strength, but must be resistant to the environmental conditions it is exposed to.

If careful attention is given to product selection with the specific application in mind, silicones can perform as both adhesives and sealants, thereby making them a very versatile and cost effective solution in a wide variety applications.


By nature must adhere to both substrates in order to produce a strong bond and also have sufficient cohesive strength to perform the desired function. Substrate adhesion is a function of the chemical formulation of the adhesive, the physical properties of the substrate and the environmental conditions when the bond is made. In some cases there will be a need for the use of a primer to improve or facilitate chemical adhesion.


Seals are normally made using a compressible elastomer either applied as a pre-cut gasket or as a liquid sealant. Silicones can be used in both of these production methods and are frequently chosen for their ability to bond as well as seal.

For more detailed information see the following pages

Silicone adhesives and sealants
Silicone primers
FIPG (Formed In Place Gaskets)


ACC Silicones Ltd, Amber House, Showground Rd, Bridgwater, TA6 6AJ
Tel: +44 (0) 1278 411400 Fax: +44 (0) 1278 411444