One Reference for Every Stage of Seal Selection
A 200-page engineering reference covering elastomer selection, chemical compatibility, groove design, sizing and installation — built from ISMAT's 40+ years of sealing manufacture.
A Complete Technical Guide to O-Ring Selection, Sizing and Sealing Performance
Choosing the wrong O-ring material or size doesn't just cause a leak — it causes downtime, warranty claims and repeat failures that cost far more than the part itself. This handbook is built to stop that at the source: the selection stage. Compiled by ISMAT's engineering team, it covers what actually determines whether an O-ring performs in the field — not just a size chart, but the reasoning behind material choice, compression, temperature limits and chemical exposure.
200
Pages
Of technical reference content, from material science to gland design.
9
Elastomer Families
ACM, CR, EPDM, FFKM, FKM, FVMQ, HNBR, NBR and VMQ covered in depth.
AS568A
Size Charts
Full dimensional data for standard O-Ring sizes and gland design.
14
Chapters
From company certifications through failure analysis and back-up rings.
14 chapters, built for engineers who specify seals
A single reference spanning material selection through installation and failure analysis.
Company Introduction & Certifications
ISMAT's engineering capabilities and the quality certifications behind our sealing solutions.
An Introduction to O-Rings
O-Ring geometry, dimensional parameters and the basic principles behind mechanical sealing.
Introduction to Elastomers
The compounds used in O-Ring manufacture, their classifications and suited environments.
Elastomeric Material Properties
The mechanical and physical properties that influence sealing behavior in service.
Chemical Compatibility
Selecting materials based on resistance to specific chemicals, fluids and conditions.
Selection of O-Rings Based on CSD
How cross-section diameter affects sealing performance and CSD selection criteria.
O-Ring Groove Design Considerations
Gland depth, surface finish, clearance and compression allowance.
Seal Types and Gland Design
Static and dynamic seal configurations with gland design guidance for each.
Size Charts
Comprehensive dimensional reference tables per AS568A specifications.
Installation Recommendations
Correct handling, lubrication and fitting practices to prevent damage.
O-Ring Failures
Common failure modes, their causes and corrective measures.
Industrial Applications
How O-Ring seals perform across oil & gas, automotive and chemical processing.
Back-Up Rings
Extending pressure capacity and preventing extrusion in high-load systems.
Everything You Need to Pick the Right Seal
Material charts, temperature limits, groove sizing and chemical compatibility data — all in one guide from ISMAT's engineering team.
Built for engineers who specify seals
Design & Mechanical Engineers
Selecting elastomers and O-Ring geometry for new equipment and assemblies.
Maintenance & Reliability Teams
Diagnosing seal failures and identifying corrective measures in the field.
Procurement & Sourcing Teams
Evaluating material options and suppliers against application requirements.
Students & Early-Career Engineers
Building a practical foundation in sealing fundamentals and terminology.
Founded in 1981, ISMAT designs and manufactures high-performance seals from elastomers and engineering plastics for the oil & gas, automotive, chemical and earthmoving industries. This handbook draws on that in-house R&D, testing and manufacturing experience.
52,000 sq.ft.
Factory Area
250+
Skilled Workforce
In-House
R&D & Tooling
AI-Powered
Precision Mfg.
A Simple Guide to a Complex Sealing Choice
Covers rubber types, sizing standards and installation steps in simple language — so you can pick the right seal without guesswork.
Trusted by Industry Leaders
Flowserve
Caterpillar
Bray
ONGC
ISRO
Vedanta
NPCIL
Voith
Have a Sealing Challenge We Can Help With?
Talk to our engineering team about material selection, custom compounds or application support.
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