• Great flowability
  • Cures at room temperature
  • Two component silicone
  • Long working time
  • 25 Durometer
  • High tear and tensile strength
  • Easy de-mold
  • Ships within one business day


100% MONEY


Sku: 28032002010
ArtiSil 1025T mold making rubber is a two-component material, consisting of Part A base silicone and Part B curing agent. Cures at room temperature by a condensation reaction.

ArtiSil 1025T has great flowability, a long working time, medium hardness, high tear and tensile strength. Easy de-mold from complex replica parts. Acid and alkali-resistant and has low linear shrinkage.

Suited for reproduction of figures, art objects, decoration molding, gypsum products, resin products, etc.

Basic Guidelines for Using ArtiSil Silicone

  1. Prepare a container to create your mold in. It can be a plastic cup, a wood box or any other non-porous, smooth container. Make sure the container is no more than ½” wider on the edges than your plug. This way you avoid using too much silicone. Silicone is expensive and you don’t want to use more than you need to. Also, make sure your container is taller than your master.
  2. Secure your master (the part you want to make a mold of) to the container and make sure there are no gaps. Hot glue can be a good option to secure the part. If there are gaps between the master and the container, you can use a molding clay to fill the holes.
  3. You can spray your master and container with a mold release if you would like but it is not necessary. If you decide to use a mold release to help remove the master, use one that is compatible with silicones.
  4. Calculate how much silicone you will need. You can calculate this be measuring your container as well as the master.
    1. Multiply width x height x depth of the container
    2. Multiply width x height x depth to find volume of the master
    3. Subtract volume of the master from the volume of the container
    4. Divide by 10 for the volume of the part B.

          You will want to mix a little extra to allow for the silicone that will stay on the mixing bucket and stir stick.

  1. Use a small scale such as a kitchen scale to weigh the silicone. This silicone is mixed at a 10:1 ratio by weight. Pour the Part A and mix thoroughly before adding Part B. Once Part A is mixed well, add Part B based on the calculations made. Be sure to ‘Shake Well’ the Part B. Components in the Part B can settle. You can pour Part A and Part B in separate cups and then combine both into one large cup. OR, you can do it all in one cup.
  2. Mix thoroughly with a paint paddle or stir stick. Make sure to get rid of streaks and scrape down the sides of the mixing cup. It should be a uniform color. It is imperative to mix thoroughly.
  3. Roll around the mixing cup to get rid of any air bubbles before pouring into the container with the master.
  4. Pour into container over one spot. Let the silicone work its way around the master. Once filled in, you can tilt the mold container side to side to work out air bubbles
  5. Cure time is approximately 24 hours but could be a little sooner or a little later depending on room temperature.
  6. Once cured, you can cut or take apart the container the silicone was poured into. If you used a plastic cup, you could cut it down the side. If you used a wood box, the screws could be removed to release.
  7. Once the silicone is released from the container, you can cut a zig zag pattern down the side to release the master. You could use an Exacto knife of something similar. It is important not to cut all the way to the master on the first cut. Slowly cut it away to avoid ripping or tearing the new mold.
  8. The master should pull away from the silicone easily. If cut nicely the mold should go back together nicely.
  9. The mold is now ready to be used to replicate the original plug.


Typical properties   

Viscosity (cPs):                                                                                     35,000/ 100              

Pot Life (gel time):                                                                           60-120 minutes

Mix Ratio:                                                                                        100A:10B

Specific Gravity:                                                                                  1.12/ .98              

After cure (7 days@25 degrees C)

Tensile, psi:                                                                                         450 psi

Elongation, %:                                                                                    400

Durometer, Shore A:                                                                          25

Tear (die B) minimum:                                                                        150 pli

Linear shrinkage; %:                                                                            0.3-0.4

Cure time:                                                                                           24 hours        

Plaster, polyurethane, PU, GRC, cement, resin, polyester, wax etc. are materials that can be cast into the cured silicone mold.     

Customer Reviews

Based on 8 reviews
Not "smooth -on" But Very Close..Good Value for money.

sets up Faster Than Smooth on mold max 30...

Charles Greeson
Super strong and mostly transparent.

Tin based silicones are not usually clear (heavy opaque blue/pink/green/etc), this one is actually see through. Kinda like Sorta-clear from smooth on (not glass clear, but enough to see through during filling/removal)

Very durable and stretchy, used the molds 10-20x so far and no signs of deterioration. Adheres very well to existing molds (patch/repairs).

William a whipple
Good for pooring epoxy climbing holds

This worked really well for reusable molds. Its a little tougher than some others so it doesn't tear easy but it doesn't stretch as much making demolding a little harder.

Great for rock climbing holds

David B. Wasson
Buyer Beware

The first time I bought 2 gallons for one mold. I mixed and degassed each gallon separately. The mold came out fantastic and is very durable. Then I ordered 1 gallon and used a small portion for a practice mold. Again I was impressed. So I got 2 more gallons for a larger project. I Was disappointed to see the packages laying down and leaking and the hardener bottle levels low...(no leaks, They were sealed). Ever the optimist, I mixed both up anyway. Now I have a floppy, useless mold. My bad. If you buy and the hardener weighs under 400 grams (bottle and fluid) return it. Otherwise it's a great product.

Reply from Fiberglass Warehouse: We are so sorry. Somehow this must have missed our quality control process. Please reach out to us so we can make sure you have enough hardener.

Sulin Casanova
Good for sculpture reproduction

I wanted to make a mold of an Air dry clay sculpture that I made. The silicione was easy to mix and has a nice smell. I dried fast. No release agent was needed. The only problem is that the quantity was not enough to cover all the sculpture, had to complete with caulk silicone and corn starch but it worked very well. For the first time I casted a cement sculpture with this mold, worked fine, the nose broke but put it back. I liked this product very much.


Question: When curing does it heat up?

Answer: No, the curing process does not generate heat.