Hi
I’ve had good luck using a contact-cement style product (Weldwood or Barge) for heavy cowhide work, especially when I’m prepping pieces that won’t be sewn immediately. I apply a thin coat to both flesh sides, let it sit until tacky but not sticky (about 10-15 min), then press with a roller and clamp for 12-24 hours.
If anyone’s interested, you can see my works in my website here : https://paeezleather.com