Do you think that this would be durable and strong enough for a camera eyecup? Considering they’re normally rather thin, would it still be rather rigid?
Not knowing much about camera equipment, I couldn't say definitively. The thinner the cast, the more flexible it becomes but it holds it's shape well even when its thin. The best advice I could give you is to go to our website, AeroMarineProducts.com, and click on the free sample link and get a cured sample and see if you think it would be rigid enough. It is a very durable and abrasion resistant material so it does hold up well as a parts material.
So what happens is that the urethane components are very sticky, and will cling to the sides of the container that you pour it in. Even if you scrape the sides of the container, there's a good chance that you'll get unmixed urethane components in your pour. By pouring into a second container and mixing there before pouring into your mold or whatever you're using the compound on, you significantly reduce the chances of getting unmixed urethane in the final product. In short you're making sure that you have solid urethane rubber instead of pockets of liquid material.
@@AeroMarineProductsCo Thank you so much, this might be just the problem I was facing. Sometimes it left a greasy finish and then blamed the release agent for it. Defenitely going to try this tip, thank you
Hi there, the 75A Polyurethane Rubber is only available in black at this time. It is not likely that we are going to carry it in other colors in the future.
Once the mold is created it can be used with most materials but it is generally best used with coarse material like cement and concrete or other materials that are less suitable for silicone. When creating the mold it should be OK with most materials as long as you use a good mold release material. In the Concrete Mold Making Rubber kit we include a small amount of silicone mold release paste that works well for this purpose, otherwise mold release wax pastes can also be used. Our Polyurethane Rubber is extremely sticky before it has cured so it is very important to use a good mold release with it.
@@AeroMarineProductsCo thanks for the quick reply! I am looking to pour the 75A into a 3D printer part. Will that part need mold release as well? Or will a specific print material allow for easy peel away removal of the cures pour (as depicted in the video)?
Yes, 100%. It will stick to PLA and ABS, I haven't tested it with PETg filament but I don't believe that will be stick free either. The only material that we've tested that our Polyurethane Rubber will not stick to is polyethylene or polypropylene plastic, like found in trash bags or painters tarps. PETg has an extra glycol group attached which I believe may cause it to become very sticky to Polyurethane but again, I haven't tested it yet (it is on my to-do list once I do some upgrades to my printer however) For 3d printed molds you also want to seal them because there will be tiny gaps in the layers where your mold making material can become physically stuck when it cures. Our 300/21 epoxy has a similar viscosity and penetration capability as Smooth-On's XTC3D epoxy coating system for 3d prints and is good for coating and sealing 3D prints.
Hello, I'm afraid that we only ship our products to locations in the United States and Canada. For Urethane Rubber products outside of the United States and Canada, we suggest contacting your local Smooth-On distributor.
Do you think that this would be durable and strong enough for a camera eyecup? Considering they’re normally rather thin, would it still be rather rigid?
Not knowing much about camera equipment, I couldn't say definitively. The thinner the cast, the more flexible it becomes but it holds it's shape well even when its thin. The best advice I could give you is to go to our website, AeroMarineProducts.com, and click on the free sample link and get a cured sample and see if you think it would be rigid enough. It is a very durable and abrasion resistant material so it does hold up well as a parts material.
Didn't get what was the point to pour the mix in the 3rd container? And what would happen if you pour from the 2nd container in the molding form?
Nice good shot.
What is wrong with pouring out of the second container? Thanks
So what happens is that the urethane components are very sticky, and will cling to the sides of the container that you pour it in. Even if you scrape the sides of the container, there's a good chance that you'll get unmixed urethane components in your pour. By pouring into a second container and mixing there before pouring into your mold or whatever you're using the compound on, you significantly reduce the chances of getting unmixed urethane in the final product.
In short you're making sure that you have solid urethane rubber instead of pockets of liquid material.
@@AeroMarineProductsCo Thank you so much, this might be just the problem I was facing. Sometimes it left a greasy finish and then blamed the release agent for it. Defenitely going to try this tip, thank you
can you use polyurethane rubber on water based base clay
Hi Do you guys carry 60 shore a
good for beewax foundation molding ,better than silicone ,can i get various colors?
Hi there, the 75A Polyurethane Rubber is only available in black at this time. It is not likely that we are going to carry it in other colors in the future.
Are there any materials for the mold that should be avoided?
Once the mold is created it can be used with most materials but it is generally best used with coarse material like cement and concrete or other materials that are less suitable for silicone. When creating the mold it should be OK with most materials as long as you use a good mold release material. In the Concrete Mold Making Rubber kit we include a small amount of silicone mold release paste that works well for this purpose, otherwise mold release wax pastes can also be used. Our Polyurethane Rubber is extremely sticky before it has cured so it is very important to use a good mold release with it.
@@AeroMarineProductsCo thanks for the quick reply! I am looking to pour the 75A into a 3D printer part. Will that part need mold release as well? Or will a specific print material allow for easy peel away removal of the cures pour (as depicted in the video)?
Yes, 100%. It will stick to PLA and ABS, I haven't tested it with PETg filament but I don't believe that will be stick free either. The only material that we've tested that our Polyurethane Rubber will not stick to is polyethylene or polypropylene plastic, like found in trash bags or painters tarps. PETg has an extra glycol group attached which I believe may cause it to become very sticky to Polyurethane but again, I haven't tested it yet (it is on my to-do list once I do some upgrades to my printer however)
For 3d printed molds you also want to seal them because there will be tiny gaps in the layers where your mold making material can become physically stuck when it cures. Our 300/21 epoxy has a similar viscosity and penetration capability as Smooth-On's XTC3D epoxy coating system for 3d prints and is good for coating and sealing 3D prints.
Risk of adversely affecting the mix ratio. 75A can be a finicky product.
Could you please write the name of the two items that are sold in the Arab world!!
Hello, I'm afraid that we only ship our products to locations in the United States and Canada. For Urethane Rubber products outside of the United States and Canada, we suggest contacting your local Smooth-On distributor.
@@AeroMarineProductsCo thanks