Choosing your hardener amount: Use 25g for a denser, harder result — ideal for structural or load-bearing pieces. Use 30g for a slightly more workable consistency — easier to pour into fine detail molds.
Phase 1 — Preparation
1
🧮 Set Up Your Scale
Place a mixing bowl on a digital scale and tare (zero) it.
2
🧼 Prepare Your Molds
Ensure molds are clean and dry. Lightly coat the inside with bubble remover spray for a flawless surface finish.
Phase 2 — Mixing
3
💧 Pour Hardener First — 25–30g Jesmo Hardener
Pour 25–30g of Jesmo Hardener into the mixing bowl. Choose your amount based on the consistency note above. Do not use water.
4
🪨 Add Powder — 100g Jesmo Ultra Base
Add 100g of Jesmo Ultra Base powder on top of the hardener. Do not stir yet.
5
⏱ Saturation Soak
Let the powder sit undisturbed in the hardener. Ultra has a lower liquid ratio — saturation time is shorter than Premium.
⏱ 2 minutes
6
🥄 Active Mix
Stir with a spatula until smooth and oil-like.
CRITICAL: Mix for exactly 20 seconds. Ultra sets faster than Premium — over-mixing will significantly reduce your working time.
⏱ 20 seconds
7
💨 Degas
Let the mixture rest briefly to allow trapped air to rise. Spray bubble remover on the surface. Ultra sets faster — keep this step short.
⏱ 3 seconds
Phase 3 — Pouring & Curing
8
🌊 Primary Pour
Fill the molds completely in one pour. You have a 2–3 minute working window — work quickly and decisively.
9
🔄 Agitate
Gently shake or tap the molds against your workspace to force trapped air to the surface.
10
⏱ Wait for Leveling
Allow the surface to self-level before scraping.
⏱ 2 minutes
11
🔪 Level the Base
Use a long knife or straight edge to scrape away excess material and level the base of the mold.
12
🧽 Clean Up Immediately
Wash your bowl and tools right away. Once Jesmo Ultra hardens it becomes very difficult to remove — and it hardens faster than Premium.
Phase 4 — Demolding
13
⏱ Cure & Demold
Ultra cures faster than Premium. Allow the pieces to fully cure before removing from molds.