The pouring urethane sidewall thread
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- backyardskier
- Posts: 139
- Joined: Sat Nov 05, 2011 10:26 am
1. Depends on what is available. You can buy any brand of polyurethane as long as the properties suit your needs (shore hardness, cold temp resistance, pot life, etc.). I think I am the only one on this forum using Adiprene as the Smooth On stuff is more readily available.
2. Depends on your preferences. I am using a shore 90A hard rubber urethane (never tried a harder formula) and get good results. However, a harder urethane with hardness more similar to UHMWPE might give you better results.
3. Yes, you just need to router the channel accordingly.
2. Depends on your preferences. I am using a shore 90A hard rubber urethane (never tried a harder formula) and get good results. However, a harder urethane with hardness more similar to UHMWPE might give you better results.
3. Yes, you just need to router the channel accordingly.
- backyardskier
- Posts: 139
- Joined: Sat Nov 05, 2011 10:26 am
No favorites yet still researching what kind will fit my skis best.gozaimaas wrote:Tip and tail spacers are deleted when using this method. You simply rout a trench around the entire perimeter of the board and fill with your favourite urethane.
So I could fill the entire area that the tip spacer fits in , say 120mm x 200mm with the pu and it would work just fine? If so the see though tips and tails I'm going to make are going to be awesome.
As I see it the Smooth PU will get the moisture into the packaging soon after opening. Meaning goes off pretty soon (only part A, or B, don't remember:).
Hence doing a pre cured sidewalls. Using a pressure chamber as per Gozz suggestion. 50psi. Hard plastic. Impossible to imprint with a nail.
I've got PU rubber PMC 790, which interestingly is still fine, 4mnts after opening. It is soft, can imprint with a nail. See this:
Dropped my new board from about 30cm on concrete floor. PU is fine. FG slightly cracked. Nothing major.
This PU (310) is white.
This one:
http://www.smooth-on.com/index.php?cPath=5_1120_1156
is with red pigment:
Hence doing a pre cured sidewalls. Using a pressure chamber as per Gozz suggestion. 50psi. Hard plastic. Impossible to imprint with a nail.
I've got PU rubber PMC 790, which interestingly is still fine, 4mnts after opening. It is soft, can imprint with a nail. See this:
Dropped my new board from about 30cm on concrete floor. PU is fine. FG slightly cracked. Nothing major.
This PU (310) is white.
This one:
http://www.smooth-on.com/index.php?cPath=5_1120_1156
is with red pigment:
- LifeisRiding
- Posts: 80
- Joined: Sat Sep 26, 2009 7:21 pm
- Location: British Columbia
@ dbabicwa
The PU on both those boards is very nicely done! Impressive.
The boards are also very beautiful! Great work and thanks for sharing.
Can you please clarify. You said that the Red PU shown in the pictures is actually white 310 with red dye.
The link you posted however (http://www.smooth-on.com/index.php?cPath=5_1120_1156) takes me to these formulas that are clear, not white:
Crystal Clear® 202 - 90 min. cure time - for 1/16" - ½" thick castings
Crystal Clear® 200 - 16 hour cure time - for ½" - 3" thick castings
Crystal Clear® 204 - 48 hour cure time - for 3" - 6" thick castings
Crystal Clear® 206 - 5 day cure time - greater than 6" thick
Crystal Clear® 220 - MUST BE HEAT CURED - Click here to read CC220 Tech. Bulletin
Here is the link to the 310 : http://www.smooth-on.com/Urethane-Plast ... index.html
Is this correct?
Thanks!
The PU on both those boards is very nicely done! Impressive.
The boards are also very beautiful! Great work and thanks for sharing.
Can you please clarify. You said that the Red PU shown in the pictures is actually white 310 with red dye.
The link you posted however (http://www.smooth-on.com/index.php?cPath=5_1120_1156) takes me to these formulas that are clear, not white:
Crystal Clear® 202 - 90 min. cure time - for 1/16" - ½" thick castings
Crystal Clear® 200 - 16 hour cure time - for ½" - 3" thick castings
Crystal Clear® 204 - 48 hour cure time - for 3" - 6" thick castings
Crystal Clear® 206 - 5 day cure time - greater than 6" thick
Crystal Clear® 220 - MUST BE HEAT CURED - Click here to read CC220 Tech. Bulletin
Here is the link to the 310 : http://www.smooth-on.com/Urethane-Plast ... index.html
Is this correct?
Thanks!