What is 3D Printing Brim? When to Use Brim To Avoid Print failure

Introduction to 3D Printing Brim:

Looking for an alternative to a Raft in order to overcome warping problems and thereby improve the layer adhesion? The best choice to replace Raft would be usage of 3D Printing BRIM also known as Sidewalk.

A Brim has similar benefits to that of a Raft. Moreover, it can also prevent loss of excess material while it can be easily removed from the part.

3d Printing Brim
Fig: 3D Printing Brim. Credt:pinshape.com

What is a 3D Printing Brim?

A material layer which is expanded across the build platform from the margins of a 3D part is defined as a 3D printing Brim. It plays a vital role in providing bed adhesion and avoids warping.

Unlike a raft, a Brim uses only a limited amount of material and it could be easily removed without damaging the bottom layers of the part. Since Brim doesn’t reach the edges of the part, no doubt it can be assumed as a skirt.

Many of the users stick on to the raft to get a fruitful print, but as a matter of fact, Brim is greater than a raft.

When To Use a Brim?

Brim can be used for various causes, but let’s now discuss the major ones amongst them.

  • Warping: We already knew that Brim is almost the same as a raft, so while using filaments like ABS which cause a lot of warping issues, usage of Brim is highly advised. Major reason for this advice is when you use a Brim it holds the part’s outer layer very strong in its ideal place.
  • Improper Bed Adhesion: Brims are very helpful in improving the surface area by which they strengthen the contact between the part and the build plate. This increased surface area in turn increases the layer adhesion. High layer adhesion results in more chances of getting fruitful prints.
  • Avoid Print Failures: Having a Brim can improve bondage between bed and the part at all points. While using PLA filaments, it’s not that necessary to print a Brim. But when used, it can be removed profitably without damaging the actual part.
  • Weak Supports: When you try to print large or big parts with small support structures, there are high chances of breaking during the process. Hence, at this point of time, Brim can be used to provide additional support to the support material, which in turn provides firm support to the part.
  • Thin Base: While printing a part that has a small base area, usage of Brim is crucial to hold it tight to the build platform. This prevents the print failure and inturn increases the overall part strength.

Merits And Demerits Of 3D Printing Brim:

Now let us look into some positive and negative aspects of using a Brim.


  • Minimizes warping issues when stubborn filaments like ABS are used.
  • Boosts the bed adhesion and prevents print failures.
  • Dismantling of Brim is relatively easy without affecting the part. 
  • Bottom layers can be kept aloof from Brim when used.
  • Material needed to print a Brim is less than a Raft and hence reduces the material wastage.


  • Material Wastage is much much lesser.
  • Brim contact points to be coated by sand to ensure smooth surfaces.
  • A small probability of part breakage is possible while separation. 
Bheema Shankar
Author | Website

I am Bheema Shankar. I have worked on SLS, CJP, DLP, SLA and FDM technologies at Think3D. Currently working as Process and application engineer at VEER-O-METALS PRIVATE LIMITED. I am always fascinated by the process of creating things layer by layer. This fascination led me to pursue a career in 3D printing technology. I am passionate about how 3D works and enjoy exploring new ways to improve the 3D printing process.

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