Silicone Mold Putty Kit (A+B) Blue — 2 Sizes

Silicone Mold Putty Kit (A+B) Blue — Make Your Own Molds in Minutes

A two-part silicone putty mold making kit for creating custom molds from any object. Mix equal parts of the white (Part A) and blue (Part B) putty together by weight, press around or over your object, and within 15–20 minutes you have a flexible, reusable silicone mold ready for casting with resin, epoxy, plaster, wax, soap, or polymer clay. No specialist equipment needed.

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The blue color of Part B acts as a mixing indicator — knead until the putty is a uniform color with no white streaks, then you know it’s fully mixed and ready to use. Available in two kit sizes — the 120g kit (2 × 60g jars) is ideal for small objects and testing, while the 260g kit (2 × 130g jars) suits medium objects and repeat casting.

Sizes & Prices

120g Kit (2 × 60g) — 60g Part A + 60g Part B — $19.08
260g Kit (2 × 130g) — 130g Part A + 130g Part B — $38.70

Key Specs (from label)

Mix ratio: 1:1 by weight (equal parts A and B)
Working time: 3–5 minutes
Curing time: 15–20 minutes
Part A: white — Part B: blue (color indicates full mixing)
Compatible with: resin, epoxy, plaster, wax, soap, polymer clay
Produces a flexible, reusable silicone mold
Non-toxic formula
No mixing tools required — mix by hand

How to Use

Measure: Take equal portions of Part A (white) and Part B (blue) by weight.
Mix: Knead the two parts together by hand for 1–2 minutes until the putty is a uniform color with no white streaks remaining. Work quickly — you have 3–5 minutes of working time.
Press: Press the mixed putty firmly around or over your object, capturing all the detail. Ensure full contact with the surface to avoid air pockets.
Wait: Leave undisturbed for 15–20 minutes at room temperature to cure fully.
Demold: Gently peel the putty away from the object. Your mold is ready to use immediately.
Cast: Pour your chosen casting material (resin, plaster, wax, soap) into the finished mold.

Frequently Asked Questions

How much putty do I need for my object?
You need enough putty to cover the object with at least 3–5mm of wall thickness on all sides. Small items such as coins, buttons, charms, and small flowers work well with the 120g kit. Medium items such as small figurines, shells, or pendants suit the 260g kit. For larger objects, purchase multiple kits.

What is the difference between this and the orange silicone putty kit?
Both are two-part silicone mold putty kits with identical specs — same mix ratio, working time, and cure time. The difference is the color of Part B (blue here, orange in the other kit) and the brand (TDIY). The color is purely a mixing indicator and does not affect the finished mold. Choose either based on your preference.

Can I use this mold putty with resin?
Yes — once cured, the silicone mold is compatible with UV resin, epoxy resin, and polyester resin. Silicone is naturally non-stick so no mold release spray is needed. Simply pour your mixed resin into the mold and cure as per your resin instructions.

Is the mold reusable?
Yes — cured silicone putty molds are flexible and reusable. With careful use they can produce many casts. Avoid sharp tools or overstretching the mold when demolding to extend its lifespan.