Manufacturer profile · high-security locking
Mul-T-Lock security systems in Vienna
Mul-T-Lock specializes in patent-protected cylinder platforms, reversible keys and expandable master-key systems. RIVA assists in Vienna with system identification, protected reorders and selecting a cylinder that actually fits the door, protective hardware and security goal.
Mul-T-Lock is a clear option for protected reversible keys and expandable master-key systems. Choose the platform by key-plan needs and risk, not by the highest product name.
- You want to discourage uncontrolled key copies.
- You need keyed-alike cylinders or a master-key hierarchy.
- Several cylinder formats should share one platform.
- A lost key must be blocked digitally at once.
- You only want a low-cost standard cylinder without a security card.
- Original key and code or security card
- Exact internal and external cylinder dimensions
- Number of doors, keys and permission groups
Manufacturer overview
Strong key control with a clearly identified platform
MTL 400, MTL 600 and MTL 800 cover different security, copy-protection and master-key requirements. Each platform supports various Euro cylinders, padlocks and other locking points. Existing installations require the precise profile, key card and version to be checked; a similar-looking key head does not establish compatibility.
Real product examples
Mul-T-Lock products worth comparing
These are orientation examples, not a promise of stock or a one-size-fits-all recommendation. Each card explains the useful fit and the first compatibility check.
MTL400
Best fit
Apartments, homes and smaller business key plans
The platform supports controlled copies, keyed-alike sets and master-key options.
MTL600
Best fit
More demanding master-key plans and commercial use
MTL600 joins protected keys with many cylinder formats and broad master-key capacity.
MTL800
Best fit
Complex plans with very high copy and manipulation resistance needs
The premium platform uses several locking mechanisms and supports complex master-key structures.
Portfolio map
Mul-T-Lock platforms
MTL 400
Protected platform for residential and commercial use with controlled duplication and master-key options.
MTL 600
High-security platform using telescopic pins, a patented moving element and broad master-key capabilities.
MTL 800
Premium platform with several independent locking mechanisms for demanding protection and organization.
Applications
Typical applications
- Apartment and entrance doors requiring strong control over replacement keys
- Keyed-alike sets for entrance, basement, garage and ancillary doors
- Commercial master-key systems with several permission levels
- Existing Mul-T-Lock systems needing replacement keys or a cylinder change
Specification
Treat the cylinder, protective hardware and key profile as one system
A high-quality cylinder reaches its intended security level only with the correct length, protective fitting and installation. Protected reorders also require authorization for the exact key profile.
Platform
MTL 400, 600 and 800 differ in mechanism, protection level and master-key capacity.
Door protection
A projecting cylinder without pull protection weakens even an advanced locking platform.
Reorders
Protected keys are ordered through authorized channels using the security card assigned to the system.
Choose by situation
Which Mul-T-Lock direction fits your case?
Start with the problem you need to solve. The product is the result of the check, not the starting assumption.
I want one key for my flat, cellar and mailbox.
A suitable MTL platform can key several cylinder formats alike.
Compare
Start with MTL400
Record every cylinder format and size first.
Our business needs master and department keys.
MTL600 or MTL800 may fit when the key hierarchy is complex enough.
Compare
MTL600 / MTL800
Create the key plan before choosing the tier.
A key is lost. Can it be blocked?
Not digitally in a purely mechanical cylinder. Review the affected rights and possible cylinder changes.
Compare
Compare mechanics with CLIQ
Assess the loss before ordering another key.
Quick question
Quick question about Mul-T-Lock?
Tell us what is installed or what you want to achieve. You do not need to know the exact product name.
- Only three short details
- No-obligation reply
- Directly to the RIVA team
RIVA Wien
Mul-T-Lock service from RIVA
RIVA identifies existing Mul-T-Lock systems, measures cylinders and advises on protective fittings, keyed-alike sets and master-key plans. Protected keys are ordered only after authorization is verified.
- 1Check the door, hardware, cylinder dimensions and existing locking system before ordering
- 2Define the required security level, access permissions and future expansion together
- 3Source compatible components and install them professionally in Vienna
- 4Hand over keys, security cards and access permissions in a traceable way
RIVA services
Services related to Mul-T-Lock
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FAQ
Mul-T-Lock: questions and answers
Technical terms in plain language
- Keyed alike
- One key opens several cylinders built for it.
- Master key
- A higher-level key opens several defined areas.
- Copy protection
- Technical and process barriers against unauthorised copies.
Sources used for the manufacturer and product overview:
Content reviewed: July 2026. Availability and compatibility are confirmed per project.
Get a practical Mul-T-Lock shortlist
Send photos, measurements or your key card. You do not need to know the product name. RIVA checks compatibility, availability and installation in Vienna.