Polycaprolactone plastic 1

[PlantRat]

Hi,

I have an older Homelite 330 chainsaw which is in excellent condition except for the cap for the fuel/oil tank. The fuel cap is no longer available for purchase. I recently contacted a business that sells Polycaprolactone plastic under the name of "friendly plastic". It is also called Shapelock by other suppliers. I sent an email asking if the low temp plastic was able to withstand gasoline and oil. I received a response that advised me that the low temp plastic has been found to be resistant to some solvents, but I would need to purchase the product and decide for myself if this type of plastic would be resistant to gasoline.

I find it hard to believe that a business that manufacturers this product is unaware of the products ability to resist certain chemicals and solvents. I also asked if it was possible for them to supply me with a chemical analysis that would aid me in researching their product (Polycaprolactone plastic ). They did not even respond to this question.

Can anyone tell me if they have experience working with Polycaprolactone plastic and gasoline resistance, or provide me with some sort of product information that would allow me to do my own research................thanks.

 

[unclesyd]

One way out of your dilemma is to go to a store that sells saws and look at the caps and see what they are using. Not to be sure my saws appear to use polyethylene or cork. Alternately you could similar size cap and fit the gasket to your cap.
Also at the hardware store you might find a cap that is a match to yours.
A big auto parts store should have gasket material compatible with gasoline.
You will find over 90% of the plastics suppliers are just stocking or drop shipment warehouses. The suppliers can afford to run compatibility and leave it to the material manufacturer of a front end supplier to make a list. Normally if a supplier gives you a recommendation they are reading from someone else,s list.

 

[PlantRat]

unclesyd,

Thank you for the response. I have checked the caps supplied with Poulon, Stihl, and others. I did find one cap that I could push on instead of screw it on. When on all the way it will not tighten down because the inside molded threads are just a tad larger in diameter than the fuel tank neck. I am thinking about ordering one of these caps and filling the inside of it with a product manufactured by 3M. If I recall correctly it is actually an epoxy used to form a drip rail on the older vehicles. Once cured it is reported to be impervious to solvents, gas, oil, and other liquids.

I will use some vegetable oil for a release agent on the fuel tank neck.....thanks again.