not knowing the exact parameters of your application, I suggest you to have a look at the following documents:
- Water blocking in cables - the what, why and how by Prysmian Australia PTY LTD
Available at: https://www.ecdonline.com.au/content/electrical-distribution/article/water-blocking-in-cables-the-what-why-and-how-290969858
- Radial Water Barrier in Submarine Cables, Current Solutionsand Innovative Development Directions
Leszek Resner and Sandra Paszkiewic
Energies, 14, 276 (2021)
Available at: https://www.google.it/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiU4f77vfbxAhXwhP0HHfrMAaMQFjAEegQIDhAD&url=https%3A%2F%2Fwww.mdpi.com%2F1996-1073%2F14%2F10%2F2761%2Fpdf&usg=AOvVaw2MHMcIsz16jlmL4QPyorKp
- Technical Specification for Aluminium Conductor Underground Power Cables for Nominal System Voltages of 11 and 33 kV by Joint Ergon Energy/Energex
Available at: https://www.ergon.com.au/__data/assets/pdf_file/0018/233640/JTS04-01-09.pdf