Semost RTV Silicone Rubber

https://www.youtube.com/watch?v=9BRsNyH199g

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How to add the silicone oil to the silicone rubber? silicone oil is any liquid polymerized siloxane with organic side chains. The most important member is polydimethylsiloxane. These polymers are of commercial interest because of their relatively high thermal stability and their lubricating properties. And silicone oil seems the silicone rubber mate for many user of silicone rubber would add silicone oil to reduce the viscosity or the hardness of the rubber, especially those ...who make the printing pads by the liquid pad printing silicone rubber. Then, how to add the silicone oil to the silicone rubber? Generally speaking, the silicone rubber has two kinds, tin cure (condensation cure ) silicone and platinum cure (addition cure) silicone rubber. And the part B of both kinds are the hardner. Usually, the silicone oil would be added into the hardner. Stir the mixture of silicone oil and hardner evenly before adding the silicone rubber base. How many silicone oil to be added into the silicone rubber? If for our pad printing silicone rubber SE-635# in 32~34 shore A, then every 2% silicone oil (100g hardner, 2g silicone oil), would reduce 1 shore A. And if 25% silicone oil added into the hardner, the hardness would be about 15shore A. If for the common tin cure silicone rubber, every then every 2% silicone oil (100g hardner, 2g silicone oil), would reduce 1 shore A. If for the common platinum cure silicone rubber, every then every 0.5% silicone oil (100g hardner, 0.5g silicone oil), would reduce 1 shore A. Of course, the data above are theoretical. Pls do take a small test before the produce.

How to avoid holes on the artificial stone veneer surface after drying? The holes produced on the surface of stone after drying,it may caused by two reason,firstly,if the original stone mold is not clean and has dust on it,the silicone mold you made by this original mold will have Bumps,then products made by this silicone mold will have hole on the surface;of cause,if the silicone mold surface is not clean and have dust on it,the product's surface will also has hole. secondly...,it caused by bubbles,when you cast concrete material,the bubble is not released fully,so the surface has hole. So Pls try to clean the original mold before made the silicone mold,and clean the silicone mold before duplicate your products.and in the process of casting concrete,you should shake the silicone mold to evenly distribute the solution and release the bubble.

Does color has effect on silicone physical property? Actually,Color or adding pigment in to silicone has no effect on the silicone physical property. Regarding to the color,white is the main color of condensation cure silicone,translucent is the nature color of addition cure silicone, skin color is lifecasting's main color. We should communicate details with customers if they need other color.... Now many customers like adjust the color by themselves. In the meanwhile, we should alert customers that the silicone will not cure if it contact with the metal element. Therefore, any pigment containing metal element cannot be added into the silicone. Additionally,pigment has water soluble and oil-based,but for silicone,we should choose oil-based pigment.you also can choose special silicone pigment when you buy it. We advise that customers should make a test before putting the pigment into mass production. for addition cure silicone,it is better you not adjust color by yourself,cause addition cure silicone is sensitive to color,if you not operate well,the silicone will be poisoned and not cured,so you can ask your supplier to adjust color for you.

Perfect silicone making!

Nice food mold!

semost- Medical grade silicone Product Item: SE-805#,SE-810# Hardness:5~10 Shore A Mix Ratio: 1:1... Color: Skin/ Custom color Product description: SE-805# & SE-810# silicone rubber is platinum cure siliconebased on medical grade certificated. It is two-components silicone rubber, it will be cured under room temperature and can be cured fastly. Description: SE-805# & SE-810# silicone rubber is platinum cure silicone rubber (or called addition cure silicone rubber) based on medical grade certificated. It is two-components silicone rubber, it will be cured under room temperarure and can be cured fastly by heating. The product is colorless or skin-colored oily liquid and becomes soft elastic material after vulcanization. Characteristics - Medical grade, totally non-toxic, odorless, harmless, and eco-friendly - Flesh tone color, skin color - High elasticity; good tensile strength and tear strength - Very suitable hardness - Low shrinkage less than 0.1% - Long service life of 5 years - Good flexibility, permeability and easy operation - Excellent UV-irradiation resistance and aging resistance Applications: The application would be used for making soft silicone rubber products like human body shape, breast pad making, bra pads, silicone breast and prosthesis, shoulder pads, patch, anti slip mat, anti-skid pad, silicone scar sheet, silicone dolls filling, bra filling, artificial vagina, etc. Datesheet: Model NO SE-805# SE-810# Mixing Ratio (by weight) 1:1 1:1 Appearance/Color skin color skin color Hardness (Shore A) 52 102 Mixed viscosity (mPas) 4000500 1300500 Working Time(at23/75,MINS) 30~40 30~40 Curing Time (at 23/75, HRS) 4~5 4~5 Tensile strength, Mpa 3.4 3.6 Tear strength, KN/m 12.7 14.8 Shrinkage, % <0.1 <0.1 Elongation at break, % 500 520 Using instructions: Step 1: Prepare and clean the prototype. Step 2: Mixing part A and part B of our silicone rubber evenly according to the mixing ratio of 1:1 or 10:1. Step 3: After mixed the silicone evenly, it is better to release the bubble by vacuum pumping. Step 4: Pouring cast Notes: Please finishes all the steps within the operation time. If not, it will cause cross linking reaction, and no more further steps will be available. So, we have to pay attention to the pot life and curing time.

The product sample with hardness A20&00 to be shipped out ,thank you for your helping ,for sue we will have good corperation! High quality and very comppetive price save you cost .

Why choose silicone rubber to make mold? The need of a large number of molds making exists, such as the mold for low melting point alloy, wax, plaster, resin, unsaturated polyester resins and polyurethane casting required for forming before the molding silicone rubber was invented. Choosing silicone to make mold becomes more and more popular than other material. Undoubtedly, silicone rubber has advantages which other materials can't provide. Before the advent of the silicone ...rubber, people often use metal or wood or plaster to make mold, but this kind of mold has long processing cycle, high cost, difficult to demould, and high defect rate. In the 1960s, the silicone rubber industry began to industrialize. Silicone to make mold is widely used rapidly and replaces metal and wood and plaster due to it has these advantages of convenient operation, low cost, high precision of complex mode etc, which is one of the important materials of mold production. Using silicone to make mold has been applicable to leather embossing, artifacts copied, mechanical mapping, plastic molding, precision casting, handicrafts, building supplies and other industries. Chemical components and physical structure of the silicone rubber determines it has many other features other similar materials difficult to replace, which is embodied in the following aspects. 1. Silicone rubber belongs to the elastomer, which is more convenient to demoulding with respect to metal and other materials. 2. This operation of using silicone to make mold is convenient. The silicone rubber and curing agent can react quickly under room temperature. 3. Silicone rubber has better good physical properties and chemical properties, high adsorption performance, good thermal stability, high mechanical strength, heat resistance, weather resistance, electrical insulation resistance, a wide temperature range (-60-300 ). 4. According to the processing and application needs, the viscosity and hardness of silicone to make mold can be adjusted. And the mold silicone rubber can be obtained by varying the catalyst species, dosage, and curing conditions. All in all, the fundamental reason why choose silicone rubber to make mold is that selecting silicone to make mold can greatly improve production efficiency and reduce production costs which greatly enrich people's needs, so that businesses get more profit.