---
product_id: 26721914
title: "Oomoo 25-1A:1B Mix by Volume Tin Cure Silicone Rubber - Pint Unit"
brand: "smooth-on"
price: "S/.297"
currency: PEN
in_stock: true
reviews_count: 6
url: https://www.desertcart.pe/products/26721914-oomoo-25-1a-1b-mix-by-volume-tin-cure-silicone
store_origin: PE
region: Peru
---

# Versatile use 75 min cure 1:1 mix ratio Oomoo 25-1A:1B Mix by Volume Tin Cure Silicone Rubber - Pint Unit

**Brand:** smooth-on
**Price:** S/.297
**Availability:** ✅ In Stock

## Summary

> 🚀 Mold Your Imagination with Ease!

## Quick Answers

- **What is this?** Oomoo 25-1A:1B Mix by Volume Tin Cure Silicone Rubber - Pint Unit by smooth-on
- **How much does it cost?** S/.297 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/26721914-oomoo-25-1a-1b-mix-by-volume-tin-cure-silicone)

## Best For

- smooth-on enthusiasts

## Why This Product

- Trusted smooth-on brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **No Scale Needed:** Simplify your process with an easy 1:1 mix ratio—no weighing required!
- • **Quick Turnaround:** Experience a rapid 75-minute cure time for efficient mold-making.
- • **Room Temperature Cure:** Cures effortlessly at room temperature, making it ideal for any workspace.
- • **User-Friendly Formula:** Degassing is a thing of the past—enjoy a hassle-free molding experience!
- • **Versatile Applications:** Perfect for crafting, jewelry, home projects, and more—unleash your creativity!

## Overview

Oomoo 25-1A:1B Mix by Volume Tin Cure Silicone Rubber is a user-friendly silicone rubber designed for quick and versatile mold-making. With a fast-setting 75-minute cure time and a simple 1:1 mix ratio, it caters to a variety of applications including art, sculpture, and jewelry. This pint-sized unit is perfect for both professionals and hobbyists looking to create high-quality molds without the fuss of degassing or complicated measurements.

## Description

Smooth-On Oomoo 25 2 Pint Kit (contains 1 pint of part A and 1 pint of Part B) OOMOO Silicone Rubber - No Scale or Vacuum Chamber Required. OOMOO 25 is an easy to use silicone rubber compound that features a convenient one-to-one by volume mix ratio (no scale necessary). This silicone is easy to work with and has a very low viscosity for easy mixing and pouring. Vacuum degassing is usually not necessary. Takes excellent detail. Cures at room temperature with negligible shrinkage and good tear strength. OOMOO 25 features a 15-minute pot life and 75 minute cure time. OOMOO 25 & 30 are suitable for a variety of art-related and industrial applications including making molds for sculpture and prototype reproduction, casting plaster, resins and wax. Tin cure silicone. Cures to an opaque blue-lavendar. Tip: *Do not cast platinum cure silicone into Oomoo silicone or any other tin cure silicone*

## Features

- Easy to use 1:1 by volume ratio . No scale required.
- Oomoo 25 - Fast setting 75 minute cure time. For quick turnover of molds. Sets FASTER than Oomoo 30.
- Cast with smooth-cast, plaster or resin! Also Popular for use with Pros-Aide transfers!
- Great for craft moldmaking, candles, replicas, home remodeling, jewelry, and more!
- East to use, equal parts A and B. Degassing is not necessary. Cures at room temperature.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Container Type | Can |
| Special Features | Fast Cure Time, Easy-to-Use 1:1 Mix Ratio |
| Specific Uses For Product | Art, Sculpture, Casting, Prototype Reproduction |
| Compatible Material | Rubber |
| Volume | 1 Pints |
| Item Package Quantity | 1 |
| Color | Blue |
| Material Type | Silicone |

## Product Details

- **Brand:** Smooth On, Inc.
- **Material:** Silicone
- **Item Form:** Liquid
- **Color:** Blue
- **Item Package Quantity:** 1

## Images

![Oomoo 25-1A:1B Mix by Volume Tin Cure Silicone Rubber - Pint Unit - Image 1](https://m.media-amazon.com/images/I/618qDp3TGJL.jpg)

## Questions & Answers

**Q: Can this be used to mold body parts? Hands, face, feet, etc?**
A: I do not believe this is the intended use.  It gets pretty warm.   There are other products for molding body parts available. Luna Bean -XL- Family Size Keepsake Hands Casting KIT | Clasped Group Hand Holding & Molding Kit (Cast up to 6 Hands)  or Alja-Safe Lifecasting Alginate 3-lb Box - Plaster Casting Kit
by Smooth-On

**Q: can this be used for casting tin, which melts at 450 degrees?**
A: NO! You need to use Mold Max 60

**Q: Can I use this to make a mold from a clay ?**
A: Yes, works great.
However, use a clay that does not have sulphur. There are many clays available for this use. Sulphur can inhibit the curing of the silicone.
This silicone is really great; easy to use but be careful to follow directions and use the appropriate ratio.

**Q: Which smooth-ons do you recommend for making bracelet beads that are not so shiny, like glass or pearls, but rather look like neoprene or rubber?**
A: For this, I would only recommend an FDA resin. If one person has a reaction, it could be bad and you could get sued

## Customer Reviews

### ⭐⭐⭐⭐⭐ Get this shizz if you wanna make cool mold stuff! Its pretty freaking cool!
*by K***E on August 1, 2016*

This stuff is freaking AWESOME! Was super skeptical since I've never done mold casting like this before. I've done fiberglass and carbon fiber, but those are pretty straight forward. And especially since I was doing it on a coated surface that I couldn't find any information on whethe or not it would stick to it. So, this stuff can beapplied over a Plasti-Dip sprayed item without it sticking to it or anything, so it worked perfect for what I needed! Making shroud extenders for a projector retrofit, and needed to make a reverse of the vacuum form piece I already made. Sprayed it with Plasti Dip as a spot evener, and this stuff didn't stick to it or even tried to pull it of. Sweet!I was worried I would get the mix ratio wrong, or mess up a step, but it's really not hard, but this stuff is a chore to mix by hand.Oh!BE SURE once you've poured A and B together and mixed that you pour into a second cup, and remix and scrape the sides and get every bit you can because the different parts WILL stick to whatever you're mixing in. When I scraped out cup #1 into cup #2 there were still parts of blue and green not mixed all the way, so it's a definite MUST.A++, 5 stars, 100% what ever, I'm impressed , and have just have to buy more for the 2nd headlight.(wasn't sure how much I was going to need, so just ordered the one) Going to also be buying their smooth cast 300 for the actual cast piece once these puppies are all set up

### ⭐⭐⭐⭐⭐ Used to make mold for making wax masters of 3D printed part for casting
*by S***N on January 14, 2019*

I used this material to make a silicone mold for a musket part that I wanted to have cast out of steel. To do this I had to make a wax master. I used Solid Edge CAD software to design the master, and then used it to scale the part up 3% to account for shrinkage of the steel. After filling and sanding the master smooth, I was able to pour a silicone mold around it. I used vegetable oil as a mold release agent.The silicone worked very very nice because I was not able to easily make a two-part mold for this part, and this part has undercuts that would make it hard to remove from a rigid mold. But due to the flexible nature of the silicone, once the wax solidified I could stretch the opening enough for the part to be pulled out, and then it returned to its original shape for more pouring.Being 2 parts equal volume to mix, it's very easy to mix this "by eye" without measuring. I had enough silicone to make 3 molds as seen in the picture.Few problems with bubbles, and the material conforms closely to the master and picks up all details. Sets up fast enough that you can use your mold the same day you cast it. I used a palm vibratory sander to vibrate the mold casing while the silicone was still liquid to help shake out any bubbles.Because I did not scale up the first master enough to account for shrinkage of both the steel and the wax, I am having to do this over again with a larger master. But I am buying this product again for round two!This was my first ever attempt at making a silicone mold and casting wax in it.I highly recommend this product.

### ⭐ Bad batches -
*by M***Z on April 25, 2022*

The media could not be loaded. First I’d like to say that I have always choose Smooth-On’s products. I will continue to use their products, but I’m disappointed in this recent batch. I have never experienced before and will update this review after my findings. I can only upload one video, so I choose the mix from the first batch.Ordered 3 small batches of OOMMOO 25. Each batch comes with 2 bottles, each is 1 pint. I received the delivery today and prepped to use it today.Opened first batch, both bottles have to be mixed well before you use them. The bottle Part A was already almost to firm to use. I tried mixing what I could get equal with Part B, it wasn’t mixing and that was discarded.Tried the second batch, it was a little similar, hard to mix, but I was able to get it mixed with Part B. I mixed until color was blended, even used my mixing paddle with a drill. That allowed me to pour something tonight.I will come back to this review when it cures(if).I would like to get a replacement on the two batches. I’m not opening the third.TBD**Update** 4/27/2022 - After chatting with Amazon, they graciously sent me 2 new kits. I received them yesterday and this morning I opened both Part A containers, the product doesn't even come out of the container. Its not my fault that this product is defective and yet almost $100 dollars tosses out the door. This is not my fault im getting bad batches and would like my money back. The 3 kits are ready to hand back.

## Frequently Bought Together

- Oomoo 25-1A:1B Mix by Volume Tin Cure Silicone Rubber - Pint Unit
- Smooth-Cast™ 300: Bright White, Low Viscosity, Liquid Plastic Casting Resin - Pint Unit
- Smooth-On Universal Mold Release - 14 Fluid Ounce Aerosol Can

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*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-01-23*