Jump to content

DiY Polyurethane Foam seat


Recommended Posts

Im looking at a way to make my own seat  with spray foam insulation (polyurethan)

The hard part is making the mould on top of the EUC

i guess i could use cardboard taped to the wheel with a plastic covering the inside part, then i spay the foam !!!

just an experimentation...

Hope  i will not get this:


Edited by Lavabo
Link to comment
Share on other sites

I was considering doing the same some time ago, and I would’ve covered the wheel with saran wrap, and then made cardboard walls as a mould.

My testing with the foam turned me off though. The air cavities in the spray foam are too big for a seat, and the material doesn’t bounce back like PU insoles do for example. Spraying the foam in a cup first then stirring with a stick gets rid of the large bubbles, but the result might be a bit on the dense side. Then again, bicycle seats are usually very dense as well.

I just received a big bum bicycle seat, and the spring metal brackets will hopefully arrive soon as well. 30€ in total, 20€ if you want to use a single bracket.

Edited by mrelwood
Link to comment
Share on other sites

On 12/13/2019 at 6:36 AM, Lavabo said:

Im looking at a way to make my own seat  with spray foam insulation (polyurethan)

How is the resilience of the foam insulation? I thought once you compress it, it stays in compressed state.

High-resilience foam typically used in auto seats, couches, mattresses, etc. doesn't have this issue and can easily be cut with hot piano wire (heated by current). You can also buy "hot knives" and similar tools for cutting finer pieces where it needs to match the shape of the wheel.

  • Like 3
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...