Picked up some Epo-Grip epoxy 2 part not water basedand just had a few ?'s'
While using Epo-Grip on deer mount will it stil adhere to hide after the 30 min woking time is exceeded, when it came time for facial work it already seemed to be setting up and wasn't very tacky to the touch.
And does Epo- Grip adere to wet capes? (Krowtanned)
And how thick do you apply it?
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Epoxies work due to a chemical interreaction between the two separate chemicals. Epo-Grip Epoxy Hide Paste is normally viable for up to 6 hours, but only IF you take certain precautions.
ONE: Do not heat either part. Heating the parts accelerates the chemical reaction time. Your batch may cure in minutes versus hours if you heat it.
TWO: Always keep them stored at above 70 degrees. Lower than that slows down the reaction time as well as makes it difficult to mix.
AND THIRD: A very easy one to miss and it will screw you up every time. The mixing "pot". If you mix epoxy in a deep container, the reaction time increases because of the "depth" of the chemicals. To take advantage of the time, always mix it in a shallow container and keep it thinned out. If you have a pint of it mixed and put it in a pint jar, it cures very quickly. If you pour that mixed pint out on a mortar board or shallow pan, it will cure in about 6 hours.
Epoxy does NOT adhere easily to a WET hide. Your hide needs to be toweled dry so that the skin is "tacky" to the touch. Remember, when using epoxies, you can smooth them out by spraying water on the surface. Same thing with hides. And epoxies don't care what method you tan with. They work on all tanned hides, even alum.
If you have more questions call me at 800-888-2467. George gave you some good information in his post, we can fill in more of the details if you'd like.
I was going to say you have about three hours max working time with Epo-Grip. I did'nt know the container depth plays a role in set time. Thanks George.
There are two things other than the chemistry of the resin and hardner that effect the cure time of epoxies. Those are temperature and mass! If your shop is 95 degrees in the summer time your epoxy will cure alot faster than a shop temperature 65 or 70 degrees. Mass: How thick is the layer of epoxie material, or how much epoxy is in the mixing cup. A thicker layer of epoxie will cure faster than a thin layer because it generates more heat in the reaction.
So if you have a thin layer of hide paste on the mannikin it will take 4-6 hours to cure at about 75 degrees F. If you have a mixing cup with a few inches of material in it the cure will be accellerated because to maybe 30-45 minutes because of the heat generated by the mass of material. This is why George mentions using a wide mixing cup to keep the layer of mixed material thinner to slow down the reaction. This is true of all epoxies. There is also no rule written that says you have to mix all the material for the job at one time. Mix as you go, it will give you more than adequate time to complete the job.
Thanks for the input, My next mount I think I'll be mixing up a seperate batch for the face and lower jaw area.
How thick should I be spreading it on? and what are you using to apply it to the form? After reading responses I may have had it to thick and thanks George for the smoothing it with water input.
I'm working with a shop temp of 55-60 deg, so that should help me out.
I'll be giving you a call Steve..
In most cases you don't need much material on the mannikin about the thickness of a good coat of paint. However if your working on waddles, or areas where you need to gather skin you will probably want more glue. The epoxy hide adhesive is designed to hang on about 3/8th of an inch deep without much sliding on the mannikin. This allows you to pinch in veins where necessary and do other detail work sometimes required.