Bonded Seals

Bonded seals, a reliable solution to fix problems with static sealing

The bonded seal is a combination made up of a metal washer and an elastomer lip stuck to the metal element by means of vulcanisation.

The metal washer (made of galvanised steel or stainless steel) makes sure that the connecting components stay safely fastened together. The thickness of the washer limits the compression of the elastomer lip (NBR or FKM/Viton®) and thus avoids excessive tightening being exerted on the seal. This is how it ensures a tight seal. The internal pressure increases the plugging force when the sealing lip is activated. The bonded seal is available in various formats, normal and self-centring.

There is more information below about the metal/elastomer composition of the bonded seal, although if you what you are looking for is to make a purchase, visit our online store or request your quote.

Bonded seals, metal washer

Bonded Seals Profile Metal support Minimum explosion pressure Application Check stock
Normal Metal-Buna Normal AISI1008-10101
Galvanised Steel
540 MN/m2 General
Self-centring Metal-Buna Autocentrante AISI1008-10101
Galvanised Steel
540 MN/m2 General
Normal Metal-Buna Normal SS316L/SS304L
Stainless Steel
540 MN/m2 Corrosion protection in extreme conditions
Self-centring  Metal-Buna Autocentrante SS316L/SS304L
Stainless Steel
540 MN/m2 Corrosion protection in extreme conditions

Bonded seals, elastomer lip

Part Elastomer material Class of polymer Resistant to Aggressive to
Bonded seal NBR Acrylonitrile Butadiene, Buna-N Oils, greases, hydraulic fluids, chemical products, large variety of hydrocarbons Ozone, ketones, esters, aldehydes, chlorinated and nitro hydrocarbons.
Bonded seal FKM/VITON® Fluorocarbon rubber Increased resistance to fluids compared to other elastomers. As well as all aliphatic, aromatic, and halogenated hydrocarbons, acids, animal and vegetable oils. Ketones, alcohols, and esters with low molecular weight and components with nitrogen.