MECCANIXITY Heatsink Copper Sheet Shim 0.3mm
3.9Editor score
Includes thermal conductive adhesive
Five sets included in pack
Compact 20mm by 20mm size
10 Best Copper Pad Shim Kit (October 2026) Expert Guide
When building or upgrading a high-performance computer, managing heat is crucial for stability. Copper pad shim kits provide precise thermal gaps between components and heatsinks. They ensure efficient heat transfer without air pockets.
We compared ten leading kits based on material quality, thickness variety, and user feedback. Our analysis focuses on copper purity, dimensions, adhesive options, and compatibility with modern hardware like PS5 and M.2 SSDs.
Each pick highlights specific strengths for different cooling needs. Prices and availability change frequently. Please check current listings before purchasing to ensure you get the right fit for your specific cooling project.
Top 3 Picks for Best Copper Pad Shim Kit
Easycargo 100pcs 12 sizes 15mm Copper Pad Shim Kit
4.6Editor score
Includes 100 pieces total
Twelve thickness variations available
Pure copper C1100 material
PATIKIL Copper Heatsink Pad Shims 15x15x0.3mm
4.8Editor score
High quality copper material
Smooth surface without burrs
Ideal for small electronic chips
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Top 10 Best Copper Pad Shim Kit in 2026 Compared
The following table compares all ten selected kits side by side. It highlights dimensions, thickness ranges, piece counts, and key material properties to help you find the exact shim you need for your cooling task.
ProductsSpecificationsEditor scorePrice
Editor's Choice
Easycargo 100pcs Kit
15mm by 15mm size
0.1mm to 2mm thickness
100 pieces included total
Copper C1100 material
4.6Editor score
Editor's Choice
Easycargo 40pcs Kit
20mm by 20mm size
0.3mm to 1.5mm range
40 pieces total count
Pure copper construction
4.6Editor score
Best Premium
20x20x1.2mm Pack
20mm by 20mm dimension
Fixed 1.2mm thickness
20 pieces per pack
Heat sink compatible
4.7Editor score
Copper Thermal Shim Kit 55pcs
15mm by 15mm size
0.1mm to 2mm range
55 pieces in kit
Polished copper finish
Easycargo 4pcs 40mm Kit
40mm by 40mm size
Fixed 0.5mm thickness
Four pieces included
For larger components
4.5Editor score
MECCANIXITY Sheet Shim
20mm by 20mm size
Fixed 0.3mm thickness
Includes adhesive backing
Five sets per pack
3.9Editor score
Easycargo 20pcs with Tape
15mm by 15mm size
Fixed 0.5mm thickness
3M 8810 adhesive
Twenty pieces included
4.3Editor score
PATIKIL 12 Pcs Shims
15mm by 15mm size
Fixed 0.3mm thickness
Twelve pieces included
Bright copper surface
4.8Editor score
Leviton Copper Shims
16 to 18 series
Commercial grade connector
Ten per pack count
Insulator included
4.8Editor score
M METERXITY Shim Strip
6 inch by 1 inch
0.002 to 0.016 inch
Three sets included
DIY craft suitable
4.7Editor score
1. Easycargo 100pcs 12 sizes 15mm Copper Pad Shim Kit – Best Overall Copper Pad Shim Kit
Easycargo 100pcs 12 sizes 15mm Copper Pad Shim Kit
100 pieces total count
0.1mm to 2mm range
15mm by 15mm size
Copper C1100 material
This kit offers the most comprehensive range of copper shims for thermal gap filling. With 100 pieces across 12 thicknesses, it ensures you find the exact fit for tight thermal interfaces.
Pros
- Huge variety of thicknesses
- High conductivity copper material
- Fits many component sizes
- Great value for money
- Easy to sort and use
Cons
- No adhesive backing included
- Thin shims bend easily
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The C1100 pure copper provides excellent heat transfer rates near 401W/mK. The 15mm size fits most standard IC chips, VRAM, and small VRM components found on modern motherboards.
While it lacks adhesive tape, the precision thicknesses make up for this. You simply select the right gap and apply your own paste or pad for secure contact.
If you need a versatile set for multiple PC upgrades, this is the top choice. It covers everything from thin console shims to thicker SSD cooling needs.
Precision Thermal Fit
The 12 distinct thicknesses allow you to tailor the gap precisely. This eliminates air pockets that trap heat and degrade performance.
High Conductivity Material
Copper C1100 is a standard for thermal applications. Its high conductivity ensures heat moves quickly from the component to the heatsink.
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2. Easycargo 40pcs 6 Sizes 20mm Copper Pad Shim Thermal Assortment Kit – Best Budget Copper Pad Shim Kit
Easycargo 40pcs 6 Sizes 20mm Copper Pad Shim Thermal Assortment Kit
40 pieces total count
0.3mm to 1.5mm range
20mm by 20mm size
Pure copper material
This 40-piece kit is a cost-effective alternative for those who need standard sizes rather than ultra-fine increments. It maintains the high quality of the larger kit but focuses on common gaps.
Pros
- Affordable price point
- Larger 20mm footprint
- Six useful thickness options
- High thermal conductivity
- Good for larger chips
Cons
- Fewer thickness options than 100pc
- No adhesive included
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The 20mm by 20mm dimension is ideal for slightly larger GPU components or VRMs that need more surface area for heat dissipation. The thickness range covers most typical thermal pad needs.
Users appreciate the value proposition here. You get pure copper shims at a lower entry price without sacrificing the core material quality required for effective cooling.
For hobbyists working on PS5 or laptop cooling, this set provides the essential thicknesses without paying for unused ultra-thin options. It is a smart pick for targeted projects.
Targeted Thickness Options
The six thicknesses cover the most common thermal gaps. This simplifies the selection process when you do not need every millimeter increment.
Large Surface Area
At 20mm square, these shims cover more area than the standard 15mm. This helps with components that have wider heat spreaders.
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3. 20 x 20 x 1.2mm IC Chipset GPU CPU Thermal Heatsink – Best Premium Copper Pad Shim Kit
20 x 20 x 1.2mm IC Chipset GPU CPU Thermal Heatsink
20mm by 20mm size
Fixed 1.2mm thickness
20 pieces per pack
Enhances thermal performance
This product offers a specific solution rather than a full assortment. It is designed for users who know they need a 1.2mm shim and want a pack dedicated to that exact dimension.
Pros
- Consistent fixed thickness
- Specific 1.2mm design
- Easy to use for one job
- Strong heat dissipation
- No sorting needed
Cons
- Not an assortment kit
- Fixed thickness limits versatility
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The packaging ensures that all 20 pieces are identical. This consistency is vital for projects where you need multiple shims of the same thickness across different components simultaneously.
The compact design fits perfectly in tight spaces on GPUs and CPUs. It provides a reliable thermal interface without the need to cut or trim larger sheets to size.
If your cooling plan requires a precise 1.2mm gap fill, this is the premium choice. It removes the guesswork and ensures every shim performs exactly the same.
Consistency in Every Piece
Every shim in the pack is identical. This ensures uniform thermal contact across all components you are cooling with this kit.
Compact Design
The size is optimized for tight electronic enclosures. It fits where larger thermal pads might crowd out other components.
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4. Copper Thermal Shim Kit – 55pcs, 11 Thicknesses (0.1–2.0mm), 15x15mm Heat Spreader Pads for GPU CPU Laptop Cooling – Versatile Copper Pad Shim Kit
Copper Thermal Shim Kit – 55pcs, 11 Thicknesses (0.1–2.0mm), 15x15mm Heat Spreader Pads for GPU CPU Laptop Cooling
55 pieces total count
0.1mm to 2mm range
15mm by 15mm size
Polished copper finish
This 55-piece kit bridges the gap between the larger and smaller assortments. It offers a polished copper surface that ensures good contact with heatsinks without oxidation issues.
Pros
- Polished copper surface
- Good piece count
- Wide thickness range
- Compact 15mm size
- Easy application
Cons
- No adhesive backing
- Mixed thickness selection
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The 11 thicknesses cover a broad spectrum of thermal gaps. This makes it suitable for laptops, desktop CPUs, and gaming consoles where precise fit is key to stability.
Installation is straightforward. You select the thickness that matches your gap and apply a thin layer of thermal paste to ensure optimal performance between surfaces.
For general laptop or desktop cooling upgrades, this kit provides a reliable option. The polished finish suggests quality control that minimizes surface roughness for better transfer.
Polished Surface Finish
The polished finish improves contact. It helps the shim sit flat against both the component and the heatsink for maximum efficiency.
Broad Thickness Range
With 11 different options, you can handle diverse thermal needs. This reduces the need to buy multiple kits for different projects.
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5. Easycargo 4pcs 40mm Copper Pad Shim Thermal Kit – Large Format Copper Pad Shim Kit
Easycargo 4pcs 40mm Copper Pad Shim Thermal Kit
40mm by 40mm size
Fixed 0.5mm thickness
Four pieces included
High conductivity 400W/mK
This kit focuses on larger components that standard small shims cannot cover. The 40mm by 40mm size is perfect for Peltier modules or large printer hotends.
Pros
- Large 40mm footprint
- Ideal for printers
- Fixed thickness simplicity
- Good for Peltier modules
- Strong heat transfer
Cons
- Small pack size
- Fixed thickness option
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The thickness is fixed at 0.5mm which is standard for many thermal pads. This consistency ensures that the thermal path remains uniform across the entire surface of the module.
While it only includes four pieces, that is often sufficient for specific jobs like a single hotend or a specialized cooler setup. It is not designed for variety.
If you are working on industrial electronics or 3D printers, this kit is essential. It provides the surface area needed for effective cooling on larger heat sources.
Large Surface Area
The 40mm square size covers large thermal interfaces. This ensures the entire heat source contacts the cooler effectively.
Industrial Applications
Designed for printers and modules. It handles the thermal loads of components that standard PC shims might not cover.
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6. MECCANIXITY Heatsink Copper Sheet Shim, 0.3mm Thickness 20 x 20mm Pads with Thermal Conductive Adhesive Tapes for Desktop Computer GPU CPU Cooling Patch 5 Set – Easy Install Copper Pad Shim Kit
MECCANIXITY Heatsink Copper Sheet Shim, 0.3mm Thickness 20 x 20mm Pads with Thermal Conductive Adhesive Tapes for Desktop Computer GPU CPU Cooling Patch 5 Set
20mm by 20mm size
Fixed 0.3mm thickness
Adhesive backing included
Five sets per pack
This option stands out because it includes adhesive backing. This simplifies the installation process significantly for those who do not want to apply paste manually.
Pros
- Adhesive tape included
- No paste needed
- Easy peel and stick
- Durable copper material
- Good for small bridges
Cons
- Adhesive can leave residue
- Fixed thickness limits use
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The copper is paired with a conductive glue backing that transfers heat while holding the pad in place. This is ideal for chips that might move during transport or vibration.
The 0.3mm thickness is perfect for memory modules or bridge chips on GPUs where a thin gap exists. Five sets give you enough pads for a full GPU memory array.
For beginners or quick upgrades, this adhesive-backed choice is very convenient. Just peel the label and attach the pad to the hardware you need to cool.
Adhesive Convenience
The built-in adhesive eliminates the need for paste application. This speeds up the thermal upgrade process significantly.
Vibration Resistance
Adhesive holds the shim securely. This prevents movement that could break thermal contact during shipping or transport.
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7. Easycargo 20pcs Heatsink Copper Pad Shims 15x15mm+ 3M 8810 pre Applied Thermal Conductive Adhesive Tape on Heat Sink for Cooling Laptop GPU CPU IC Chips VGA RAM (15x15x0.5mm) – 3M Adhesive Copper Pad Shim Kit
Easycargo 20pcs Heatsink Copper Pad Shims 15x15mm+ 3M 8810 pre Applied Thermal Conductive Adhesive Tape on Heat Sink for Cooling Laptop GPU CPU IC Chips VGA RAM (15x15x0.5mm)
15mm by 15mm size
Fixed 0.5mm thickness
3M 8810 adhesive
Twenty pieces included
Using 3M 8810 adhesive ensures a high-quality bond that withstands heat cycles better than generic glues. This reliability is critical for long-term cooling performance.
Pros
- 3M adhesive quality
- Pre-applied tape
- Standard 15mm size
- High piece count
- Ideal for laptops
Cons
- Fixed 0.5mm thickness
- Adhesive may wear over time
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The pre-applied tape means you can install these directly without extra steps. The 15mm size is perfect for laptop GPU and CPU memory chips that need precise contact.
With 20 pieces included, you can cover multiple components on a motherboard or graphics card. This set offers a good balance of quantity and specific functionality.
If you are replacing pads in a laptop or desktop, this kit simplifies the task. The strong adhesive ensures the shim stays in place even under thermal expansion.
Premium Adhesive Bond
The 3M tape is known for durability. It holds the shim securely even as temperatures fluctuate during operation.
Standard Laptop Size
The 15mm size matches many laptop thermal pads. This ensures compatibility with most consumer hardware.
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8. PATIKIL Copper Heatsink Pad Shims, 12 Pcs 15x15x0.3mm Copper Pad Shim IC Chipset GPU CPU Thermal Heatsink for Cooling Laptop Desktop Computer – Quality Finish Copper Pad Shim Kit
PATIKIL Copper Heatsink Pad Shims, 12 Pcs 15x15x0.3mm Copper Pad Shim IC Chipset GPU CPU Thermal Heatsink for Cooling Laptop Desktop Computer
15mm by 15mm size
Fixed 0.3mm thickness
Smooth surface quality
12 pieces included
This kit stands out for its surface quality. The shims are smooth and bright with no burrs which ensures perfect contact with heatsinks and components.
Pros
- Bright smooth surface
- No burrs on edges
- Excellent heat dissipation
- Strong copper material
- High user rating
Cons
- Fixed thickness limits use
- No adhesive included
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The material provides excellent heat dissipation performance that fills gaps effectively. This prevents overheating and protects your electronics from performance degradation over time.
Installation instructions recommend cleaning the surfaces before applying paste. This attention to detail ensures maximum thermal transfer from the component to the heatsink.
For those who value surface finish, this is a top pick. The quality control ensures every shim performs reliably without air gaps or physical imperfections.
Smooth Surface Finish
The polished surface improves contact. This maximizes thermal conductivity by removing physical air gaps.
Burden Free Edges
No burrs mean safe handling. The edges are safe and smooth for use on delicate electronic components.
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9. Leviton Copper Shims, For 16-18 Series,Commercial Grade, Cam-Type Connector, 10 Per-Pack, A0004 – Electrical Connector Copper Shim Kit
Leviton Copper Shims, For 16-18 Series,Commercial Grade, Cam-Type Connector, 10 Per-Pack, A0004
16 to 18 series
Commercial grade connector
Ten per pack count
Hose pipe fitting
This product is designed for electrical connections rather than thermal cooling. It fits 16 to 18 series commercial grade cam-type connectors perfectly for secure wiring.
Pros
- Commercial grade quality
- Specific connector fit
- Durable thermoplastic head
- Easy phase identification
- High conductivity
Cons
- Not for thermal pads
- Designed for electrical use
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The insulators are color-coded for easy phase identification during installation. This safety feature ensures correct wiring in commercial electrical systems.
The hard thermoplastic screw head provides strength and durability for long-term electrical stability. It withstands mechanical stress better than standard plastic parts.
If you are working on commercial electrical connectors, this kit is essential. Ensure it matches your connector type before purchasing as it is not for thermal cooling.
Commercial Grade Construction
Built for industrial electrical use. It provides a secure fit for high-stress connection points.
Safety Identification
Color-coded insulators help prevent wiring errors. This ensures safety and correct installation in complex electrical panels.
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10. M METERXITY 3-Set Copper Shim Strip, Metal Sheet Stock Assortment 6" Length x 1" Width, 0.002", 0.004", 0.006", 0.008", 0.012", 0.016" Thickness Copper Sheet for DIY Craft Making Flat Bar – DIY Copper Pad Shim Kit
M METERXITY 3-Set Copper Shim Strip, Metal Sheet Stock Assortment 6" Length x 1" Width, 0.002", 0.004", 0.006", 0.008", 0.012", 0.016" Thickness Copper Sheet for DIY Craft Making Flat Bar
6 inch by 1 inch
0.002 to 0.016 inch
Three sets included
DIY craft suitable
This kit offers strips rather than pre-cut shims which allows for custom sizing. The range from 0.002 to 0.016 inches gives you extremely fine precision for mechanical parts.
Pros
- Customizable strip size
- Wide thickness variety
- Good for crafts
- Smooth brushed finish
- Easy to cut
Cons
- Very thin thicknesses
- Not pre-cut for thermal
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The material is brushed and polished which ensures smooth edges. You can cut these into custom shapes for unique cooling projects or repair needs.
While ideal for DIY, the thin thicknesses mean they are better for small gap fills. You must cut them to size which requires extra care and sharp tools.
If you need specific sizes not found in kits, this is the best option. It allows you to create custom shims for unique hardware that standard sizes cannot fit.
Custom Sizing Freedom
The strip format lets you cut any shape. This is perfect for hardware that requires non-standard shim dimensions.
Fine Thickness Precision
With gaps as small as 0.002 inches, you can fill very tight mechanical tolerances. This offers extreme precision for specialized needs.
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Buying Guide – How to Choose the Best Copper Pad Shim Kit
Choosing the right kit depends on your cooling target and hardware gap. Review these factors to select the material, size, and adhesive type that matches your needs.
Material Quality
Look for pure copper grades like C1100. High purity ensures better thermal conductivity which is essential for moving heat away from critical components.
Pure copper conducts heat better than alloys and avoids corrosion issues over time.
Thickness Range
Check the thickness range provided. You need a kit that covers the exact gap between your component and the heatsink to ensure proper contact.
A kit with multiple thicknesses offers more versatility for various hardware gaps.
Size Compatibility
Measure the area you need to cover. The 15mm by 15mm size is standard for small chips while larger 20mm or 40mm sizes suit bigger components.
Ensure the dimensions fit your hardware without obstructing adjacent parts.
Adhesive vs. Paste
Decide if you want adhesive or need to apply paste. Adhesive pads are easier to install but may be less reliable over long heat cycles.
Thermal paste offers better contact but requires more effort during installation.
Piece Count
Consider how many shims you need. Larger kits offer more value if you are cooling multiple components or have several systems to upgrade.
A higher piece count ensures you have enough for complex multi-layer cooling setups.
Surface Finish
Look for polished or brushed finishes. A smooth surface reduces air pockets and improves heat transfer efficiency significantly between surfaces.
Avoid shims with rough edges or burrs that damage sensitive components.
Project Type
Match the kit to your project. Use standard thermal shims for PCs and specialized strips for mechanical repairs or unique industrial needs.
Understanding your specific use case guides the best choice for performance.
Durability
Check the temperature resistance. Good thermal shims withstand high heat without degrading to maintain cooling performance over years of use.
Durability ensures long-term reliability for your electronic cooling setup.
How to Use and Care for Your Copper Pad Shim Kit
Clean both the component surface and heatsink with alcohol before application. Ensure no dust or old paste remains to allow proper thermal contact between the surfaces.
Select the shim thickness that matches the gap exactly. If the gap is uneven you may need to stack two thinner shims to achieve the correct height without crushing the pad.
Secure the shim with thermal paste or adhesive and press firmly to remove air pockets. If using adhesive peel the backing slowly to avoid stretching or damaging the copper.
Frequently Asked Questions
Can copper shims cause short circuits?
Copper shims are electrically conductive so you must ensure they do not touch nearby pins. Use thermal paste or non-conductive tape to insulate areas where contact might occur. Always check your hardware layout before installation.
Do I need to apply thermal paste with adhesive shims?
Adhesive shims are designed to work without paste but a thin layer improves contact. If the adhesive is strong you can omit paste for convenience but a small amount helps bridge microscopic gaps.
What size is best for GPU VRAM cooling?
Most VRAM chips fit standard 15mm by 15mm shims. Measure your specific board to confirm as some GPUs use slightly different component sizes for memory modules.
Why choose copper over thermal pads?
Copper shims have higher conductivity and compressibility. They last longer than soft thermal pads and are easier to cut to custom shapes for specific cooling needs.
Can I reuse copper shims?
Yes copper shims are reusable if cleaned properly. Wipe off old adhesive with isopropyl alcohol and check for deformation before reinstalling to ensure they fit correctly.
How do I store leftover shims?
Keep unused shims in an anti-static bag or sealed container. Store them in a dry place to prevent oxidation which can affect surface finish over time.
Final Thoughts on Choosing the Best Copper Pad Shim Kit
This guide presented ten top kits ranging from full assortments to specialized strips. The Easycargo 100pc set leads in versatility while the 3M adhesive options offer ease of use.
Prioritize material purity and thickness accuracy for your specific hardware. A well-matched shim improves cooling performance and protects your valuable components from overheating risks.
Check current prices and availability before buying as these change frequently. Always confirm dimensions match your project to avoid unnecessary returns and wasted time.