Prusa Smooth PEI Print Sheet

Artno.: PS9-438100-P
Manufacturers: Prusa Research

The Prusa Smooth PEI Print Sheet is a double-sided spring steel sheet with a smooth PEI surface. It is especially suitable for PLA prints and creates a clean, smooth part-bottom finish.

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Description
Product Reviews

PRUSA SMOOTH PEI PRINT SHEET

Prusa Smooth PEI Print Sheet

Double-sided smooth PEI spring steel sheet for Prusa 3D printers – with strong everyday adhesion, a smooth part-bottom finish and flexible part removal for precise PLA prints, prototypes and clean standard workflows.

Smooth PEI surface for precise standard prints

The Prusa Smooth PEI Print Sheet is a flexible spring steel sheet with a smooth PEI print surface. It is especially suitable for PLA and many everyday applications where a smooth, clean bottom finish is desired. The sheet is magnetically held on the heatbed and allows easy part removal after cooling by gently flexing the plate.

Strong adhesion and smooth part-bottom finish

The smooth PEI surface provides very good adhesion for many materials and creates a particularly smooth bottom surface on printed parts. For PLA, the smooth sheet is one of the classic standard surfaces. For materials with very strong adhesion, such as PETG, Flex, ASA, ABS or PC, a suitable separation layer should be used to protect the PEI foil.

Smooth PEI surface

Double-sided

Ideal for PLA

Very smooth bottom

Flexible part removal

Model-specific variants

PEI

Smooth PEI foil on flexible spring steel

2 sides

Both sides of the sheet can be used

PLA

Very suitable for classic PLA workflows

Variants

Available for different Prusa heatbed formats

SMOOTH PEI SURFACE

Clean bottom finish for models, prototypes and functional parts

The smooth PEI sheet is especially useful when printed parts should have a clean, smooth and even bottom surface. It is a classic surface for PLA prints, detailed models, prototypes and parts with a flat contact area. For strongly adhering materials, a separation layer should be used to avoid damaging the PEI foil.

PLA

Prototypes

Models

Smooth bottom finish

Standard workflow

VARIANT NOTE

One description for several Prusa Smooth PEI Sheets

This description is written generally for Prusa Smooth PEI Print Sheets. The correct variant must always be selected for the respective printer and heatbed format. Versions for MK series / CORE One, CORE One L, MINI and Original Prusa XL have different sizes and should not automatically be considered interchangeable.

Highlights

Smooth PEI surface

The PEI foil creates a very smooth and clean bottom finish on printed parts.

Very good for PLA

For PLA prints, the smooth PEI sheet is a very popular standard surface.

Double-sided use

Both sides of the spring steel sheet can be used and alternated if needed.

Flexible part removal

After cooling, many parts can be released by gently flexing the sheet.

Clean detail appearance

Ideal for models, prototypes and parts where the bottom side remains visible.

Model-specific variants

The correct Smooth PEI Sheet must be selected for the respective Prusa printer format.

Variants and Compatibility

MK series / CORE One	Variant for compatible MK heatbed formats and CORE One / CORE One+ depending on product variant; not for CORE One L.
CORE One L Smooth PEI Sheet	Dedicated variant for Prusa CORE One L. Not automatically suitable for smaller or different heatbed formats.
XL Smooth PEI Sheet	Dedicated variant for Original Prusa XL. Designed for the XL heatbed format.
MINI / MINI+	Dedicated smaller variant for Original Prusa MINI / MINI+. Do not equate with XL, CORE One L or MK format.

Technical Data

Product	Prusa Smooth PEI Print Sheet
Product Type	Print sheet / flexible spring steel sheet
Surface	Smooth PEI foil on both sides
Base Material	Flexible spring steel sheet with smooth PEI print surface
Use	Double-sided use
Surface Finish	Smooth, clean and slightly glossy bottom finish on printed parts
Especially Suitable For	PLA and many standard prints with a smooth bottom surface
Materials Requiring Separation Layer	PETG, ASA, ABS, PC, CPE, PP and Flex should be printed with a suitable separation layer
Compatible Printers	Depending on variant for MK series / CORE One, CORE One L, MINI / MINI+ or Original Prusa XL
Cleaning	Clean cold with approx. 90% IPA; use warm water with dish soap if needed and dry thoroughly
Deep Cleaning	Use acetone only occasionally and only on smooth PEI if IPA is not sufficient
Note	Print sheets are consumable parts; PEI foils can wear over time depending on material, cleaning and use.

Typical Applications

The smooth PEI print sheet is especially suitable for PLA models, prototypes and parts where a clean, smooth bottom finish is important. For strongly adhering materials, a suitable separation layer should be used so the part can be removed safely and the PEI foil is not damaged.

PLA prints

Models

Prototypes

Decorative parts

Smooth bottom finish

Detailed prints

Workshop prints

Everyday sheet

Care and everyday use

For reliable adhesion, the PEI surface should remain clean and free of grease. Fingerprints, dust and filament residue can noticeably reduce adhesion. For normal cleaning, use approx. 90% IPA while the sheet is cold. For heavier residue, warm water with a little dish soap can help. Acetone should only be used occasionally and specifically on smooth PEI, not as a daily cleaner.

Choose the correct Smooth PEI Sheet for your Prusa printer

Across all variants, the smooth PEI surface is designed for clean standard prints and a smooth part-bottom finish. The key point is selecting the correct sheet size for the respective Prusa model and preparing the surface correctly for the material used.

Adhesion and cleaning note

This description is written generally for Prusa Smooth PEI Print Sheets. Always select the variant that matches the printer model. When switching between different print sheets, first-layer or Z-offset recalibration may be required. Strongly adhering materials such as PETG or Flex can damage the PEI foil if printed without a suitable separation layer.

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