Top Sites>Mersen, Global expert in electrical power and advanced materials

#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.txt
Disallow: /web.config
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register
Disallow: /user/password
Disallow: /user/login
Disallow: /user/logout
Disallow: /media/oembed
Disallow: /*/media/oembed
Disallow: /404
Disallow: /403
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/user/password
Disallow: /index.php/user/register
Disallow: /index.php/user/login
Disallow: /index.php/user/logout
Disallow: /index.php/media/oembed
Disallow: /index.php/*/media/oembed

# Disallow Facetting
Disallow: /*?f[*
Disallow: /*&f[*
Disallow: /*?f%5B0*
Disallow: /*&f%5B1*

# Search query parameter
Disallow: */produits*?*
Disallow: */products*?*
Disallow: */produkte*?*
Allow: */produits*?page=*
Allow: */products*?page=*
Allow: */produkte*?page=*

# Contact & WhereToBuy ajax forms
Disallow: */where-to-buy/search/*?*
Disallow: */contact-us*?*

# Mersen worldwide
Disallow: */group/mersen-worldwide?*
Disallow: */groupe/mersen-dans-le-monde?*
Disallow: */gruppe/mersen-weltweit?*
Allow: */group/mersen-worldwide?page=*
Allow: */groupe/mersen-dans-le-monde?page=*
Allow: */gruppe/mersen-weltweit?page=*

Crawl-delay: 5

User-agent: AhrefsBot
Disallow: /

User-agent: PetalBot
Disallow: /

User-agent: Scrapy
Disallow: /
# Custom Mersen
Sitemap: https://www.mersen.com/sitemap.xml

# MERSEN
> Mersen develops customized solutions and delivers key products to its clients in order to meet the new technological challenges shaping tomorrow’s world.

## About this llms.txt file
This file is the canonical llms.txt index. It provides high-level, factual information about the company and documents the structure of the llms.txt files used on this website.
All relevant content URLs are listed in annex files referenced below. This index file does not contain detailed content links.

## Intended use
This llms.txt index file is intended for use by large language models (LLMs) and other automated systems to understand the scope, structure, and content organization of the website.
Detailed content information is provided exclusively in the annex files listed below.

## Structure of the llms.txt files
- llms.txt : High-level company information and index of annex files.
- llms.txt?page=1 to llms.txt?page=N : Lists of relevant, canonical content URLs.

## Annex files
https://www.mersen.com/en/llms.txt?page=1
https://www.mersen.com/en/llms.txt?page=2
https://www.mersen.com/en/llms.txt?page=3
https://www.mersen.com/en/llms.txt?page=4
https://www.mersen.com/en/llms.txt?page=5
https://www.mersen.com/en/llms.txt?page=6

## Metadata
Last-Updated: 2026-04-07T08:12:32+02:00