AI Visibility Index: Gaskets, Seals & O-Rings in Illinois

When a buyer asks an AI assistant for a gaskets, seals & o-rings supplier in Illinois, these are the companies that get named. This is what we found when the cell was last measured.

116 companies tracked
Last measured September 30, 2026
Next measurement October 30, 2026

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The headline numbers

Never named by AI

105 of 116

companies never appeared in a single buying question

They were asked the same 5 buying questions as everyone else in this cell and were not named once.

11 named at least once
105 never named

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Cell average: 0.27of 15
Across all 116 tracked companies.
Top ten average: 4.4of 15
The ten most visible companies in the cell.

A company's score is how many of the 15 measured answers named it.

The top ten in Illinois

These are the companies AI assistants named most often when Illinois buyers went looking for a supplier in this category.

Top 10 most AI-visible Gaskets, Seals & O-Rings companies in Illinois, measured September 30, 2026
Rank	Company	Location	AI visibility
1	Hennig & Gasket & Seals Inc 7 employeesChicago, Illinois 3 name variants Hennig Gasket & Seals, Inc.most common8 Hennig Gasket & Seals6 Hennig Gasket & Seals – Distribution Lines1	Chicago, Illinois	14 of 15 answers
2	Pres-On Illinois	Illinois	6 of 15 answers
3	Excelsior Inc. 35 employeesRockford, Illinois	Rockford, Illinois	4 of 15 answers
4	Windy City Seals Illinois	Illinois	4 of 15 answers
5	Accurate Felt & Gasket Illinois 2 name variants Accurate Felt & Gasket (AFGCO)most common2 Accurate Felt & Gasket1	Illinois	3 of 15 answers
6	AVT Sealing Solutions Illinois 3 name variants AVT Sealing Solutions (AESSEAL distributor)most common1 AVT Sealing Solutions Inc.1 AVT Sealing Solutions1	Illinois	3 of 15 answers
7	Chicago Rubber & Seal, Inc. Illinois 2 name variants Chicago Rubber & Seal, Inc.most common2 Chicago Rubber & Seal1	Illinois	3 of 15 answers
8	SantopSeal Illinois	Illinois	3 of 15 answers
9	Aero Rubber Company, Inc. 45 employeesTinley Park, Illinois 2 name variants Aero Rubber Company, Inc.most common1 Aero Rubber Company1	Tinley Park, Illinois	2 of 15 answers
10	Chambers Gasket & Manufacturing Co 40 employeesChicago, Illinois	Chicago, Illinois	2 of 15 answers

19 more companies were named at least once. Companies outside the top ten are counted in the averages but not named here.

Also named, based in another state

AI assistants named these companies too, but MacRAE'S lists them in a different state, not Illinois. They belong to that state's ranking, not this one.

Company	State	Mentions
Gasket and Seal Fabricators	Ohio	9 of 15
Robco Sales	New York	7 of 15
Midwest Gasket Corporation	Indiana	5 of 15
Lawson Products	Texas	3 of 15
Pneu‑Draulics, Inc.	Kentucky	2 of 15
APG	Ohio	1 of 15

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The five questions we asked

Every company in this cell is measured on the same questions, written the way a buyer would type them. That is what makes the ranking a comparison rather than a collection of anecdotes.

1“Best suppliers of gaskets, seals and o-rings in Illinois”
2“Who supplies custom high-temperature flange gaskets in Illinois”
3“I need a Illinois sealing components partner for a chemical processing equipment build, who should I talk to”
4“Top gaskets, seals and o-rings suppliers in Illinois for maintenance and reliability buyers”
5“Which Illinois gasket and seal manufacturers can handle FDA-compliant elastomer compounds with rapid prototyping”
6“List 20 gaskets, seals and o-rings companies in Illinois with their specialties.”the roster question

Each question is asked more than once, which is why a company's score is out of 15 answers rather than out of the number of questions.

Where AI drew its answers from

These are the sources the answers in this cell leaned on most, ranked by how many of the named companies each one stands behind.

thomasnet.comDirectory
5 companies
iqsdirectory.comDirectory
3 companies
aesseal.com
3 companies
henniggasket.com
3 companies
chicago-rubber.com
2 companies
afgco.com
2 companies
branhamindustrial.com
2 companies
en.wikipedia.orgDirectory
2 companies
gasketandseal.com
2 companies
robcosales.com
2 companies
midwestgasket.com
1 company
alliedseals.com
1 company

40 sources were cited across this cell's answers from 33 domains. A directory page often stands behind several companies at once; a company's own site usually stands behind one.

Illinois in context

Illinois ranks 11th of 12 measured states in this category. Each bar is the share of that state's tracked companies that AI assistants named at least once; across every measured state in this category the share is 15%.

Illinois (this report)Other measured statesCategory average (15%)

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