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Manufacturer: Zalman Last updated: 2026-09-11
Zalman ZM-STG2 Review
ZM-STG2 is Zalman's long-running budget thermal grease, a silver-grey compound sold since the mid-2000s that remains a recognizable staple in budget CPU cooling despite newer competitors entering the market.
Zalman does not officially disclose a specific W/mK figure for ZM-STG2 in current listings, consistent with the sparse documentation typical of long-running legacy budget products. ZM-STG2 uses a silicone-based/metal-oxide grease formula typical of budget thermal compounds from its era. The compound comes in a 3.5g syringe with a workable consistency suited to standard application methods for general CPU cooling. ZM-STG2 is non-conductive, carrying no short-circuit risk from typical application. Zalman does not publish a specific reapplication interval for ZM-STG2; as a long-running legacy budget product, buyers should apply standard general-purpose durability expectations. Against Zalman's own ZM-STG1 also in this catalog, ZM-STG2 represents the brand's improved successor formula, though neither carries a published conductivity figure to quantify the difference precisely.
Thermal Performance and Conductivity
Zalman does not officially disclose a specific W/mK figure for ZM-STG2 in current listings, consistent with the sparse documentation typical of long-running legacy budget products.
Compound Type and Composition
ZM-STG2 uses a silicone-based/metal-oxide grease formula typical of budget thermal compounds from its era.
Application and Consistency
The compound comes in a 3.5g syringe with a workable consistency suited to standard application methods for general CPU cooling.
Electrical Safety
ZM-STG2 is non-conductive, carrying no short-circuit risk from typical application.
Longevity and Pump-Out Resistance
Zalman does not publish a specific reapplication interval for ZM-STG2; as a long-running legacy budget product, buyers should apply standard general-purpose durability expectations.
Comparison to Alternatives
Against Zalman's own ZM-STG1 also in this catalog, ZM-STG2 represents the brand's improved successor formula, though neither carries a published conductivity figure to quantify the difference precisely.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating5.3 / 10
A long-running budget staple from Zalman, dated but still functional.
Best for
- Budget general CPU cooling where a recognizable, long-running brand name matters
- Buyers replacing an existing Zalman-branded application
Not for
- High-end or overclocked builds needing a documented, competitive conductivity figure
- Anyone wanting current-generation performance data before purchasing
Specifications
What these specs meanIdentity and form
| Brand | Zalman |
|---|---|
| Model | Zalman ZM-STG2 |
Thermal performance
| Conductivity Source | https://www.zalman.com/US/Product/ProductDetail.do?productSeq=264 |
|---|
Electrical and board risk
| Paste Segment | Standard Paste |
|---|
| Compound Type | Silicone-Based |
|---|---|
| Thermal Conductivity | 4.1 W/mK |
| Electrical Conductivity | Insulating |
| Package Size | 3.5g syringe |
| Recommended Use | General CPU Cooling |
| Reapplication Interval | Not consistently published |
| Safety Notes | None |
FAQs
What are the key specifications of the Zalman ZM-STG2 (Silicone-Based/Non-Conductive/Long-Running Budget Staple)?
Key specs for the Zalman ZM-STG2: Thermal Conductivity 4.1 W/mK, Thermal Conductivity Source https://www.zalman.com/US/Product/ProductDetail.do?productSeq=264, Compound Type Silicone-Based, Electrical Conductivity Insulating.
Who is the Zalman ZM-STG2 (Silicone-Based/Non-Conductive/Long-Running Budget Staple) best suited to?
Best suited to: Budget general CPU cooling where a recognizable, long-running brand name matters; Buyers replacing an existing Zalman-branded application.
What are the drawbacks of the Zalman ZM-STG2 (Silicone-Based/Non-Conductive/Long-Running Budget Staple)?
Not the best fit for: High-end or overclocked builds needing a documented, competitive conductivity figure; Anyone wanting current-generation performance data before purchasing.
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