How to make a silicone mold for concrete

Slaw Precast creates energy efficient wall panels for a new, state-of-the-art school building in New York City. In this video we show you how we created new concrete countertops for a custom pergola display.

Last Updated: August 25, Approved. This article was co-authored by wikiHow Staff. Our trained team of editors and researchers validate articles for accuracy and comprehensiveness. This article has been viewed , times. Learn more No worries—you can make your own mold right at home, and the process is actually really easy.

How to make a silicone mold for concrete

A great way to view and understand your building or repair project before you get started. Find out just about everything you need to know by watching the video below. When working with cement-based products, always wear eye protection and waterproof gloves. Step 3 Cut a 1 inch wide band from the remaining water bottle as a support for the mold. Step 4 Cut a piece of plastic from another bottle, as the base, and hot glue the object to the plastic bottom. Step 5 Hot glue the tube to the plastic base around the object and ensure it is sealed and water tight. Step 7 Pour that water into the cup made of the bottom part of the water bottle. Step 8 Draw a line at the top of the water to show how much silicone you will need. Step 9 Mix and pour the silicone into the tube and then let cure. Step 10 Cut away any plastic from the outside of the silicone mold. Step 11 Remove the object from inside the silicone mold. Tip: You may need to cut the silicone to help free the object and if so, try to cut the silicone where it will be least visible on the mold. Step 12 Slide the 1 inch plastic ring around the silicone mold to hold it tightly together. Step 13 Mix the concrete, following the instructions on the bag, and pour the mix into the mold.

Planning and preparing is very important. Keep stirring until the soap has completely dissolved and no streaks remain.

Hi everyone! It was my very first concrete project and, although it was a challenge, it was a lot of fun to build. While this mold is specific to this project, the method is the same for a lot of different types of concrete projects. Concrete molds are typically made of melamine. You can find it at home improvement stores in the shelving section. It can be easily cut down to size either at home, or you can have the friendly employees do it for you at the store.

But be sure to also read and watch because some things are easier to explain in writing, whereas other parts are easier to show in a video. Please click the button to subscribe to my YouTube channel and be notified when I have a new video tutorial! When making a large concrete mold you have the option of using silicone or polyurethane. Both are a type of liquid rubber that is used for making reusable molds. But for concrete planters, the right material is going to be silicone because of the release ability that silicone material has.

How to make a silicone mold for concrete

Today, I will guide you through the fascinating process of making a mold. The process starts with a model of your desired shape. This model can be anything from a simple block to a complex sculpture. To create one, you must cover your model in a mold-making material. Once hardened, this creates a negative imprint on your model. This mold is then filled with concrete and allowed to set. The intricacies may vary, but these are the core steps. Plastic and polystyrene hold their shape well, ensuring that your concrete pieces will be consistent in size and shape. Wooden molds, especially those made from plywood, are a robust choice.

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You can find these in stores specializing in casting and mold-making supplies. I love to try and experiment new things. Project goal: transform a disused service entrance into an inviting stamped concrete walkway. If you want to learn how to use cornstarch or 2-part silicone for your mold, keep reading! The concrete was thick enough that it stuck to the mold and held there. Avoid touching construction silicone with your hands. Skip to Content. Funmilayo Temidayo Sep 22, Using Silicone and Liquid Soap. Do not touch or move the mold during this time. Thanks Helpful 9 Not Helpful 0. Monika P. Depending on the type of corners you want on the finished project, you can also use silicone on the inside corners of the mold. Project Instructions Shopping List.

Oil — Oil or oiled surfaces are often used to make the surface resistant to concrete bonding.

Nov 17, Follow Us. Benchmark's recent job for Penn State University involved making a custom concrete bench. Do not touch or move the mold during this time. Rebound 25 platinum silicone captures all the woodgrain details and transfers them to the concrete casting. Roll the silicone into a disk. De-mold the items. You will always have mix Part A and Part B together. Include your email address to get a message when this question is answered. If you need to, use your fingers to pry the item out.