Silicone Factory Two Components RTV

Silicone Factory Two Components RTV

Overview Package Size 21.00cm * 11.00cm * 14.00cm Package Gross Weight 1.500kg RTV-2 Liquid Silicone Rubber 25 ShoreA fo


Basic Info.
Model NO. OTT-S825
Payment 100% in Advance
Shipment by Sea, by Air
MOQ 200kg
Trade Term EXW/CNF/CIF/Fob
Lead Time 4-6 Days
Mix Ratio 100:3
Sample Available
Shelf Life 18months
Color White or Adjustable
Hardness 25 a Shore
Transport Package Plywood Pallet
Specification 5kg, 20kg, 25kg, 200kg, 1000kg drum
Trademark OTT
Origin Guangzhou
HS Code 3910000000
Production Capacity 600000
Packaging & Delivery
Package Size 21.00cm * 11.00cm * 14.00cm Package Gross Weight 1.500kg
Product Description
RTV-2 Liquid Silicone Rubber 25 ShoreA for Mold Making (OTT-S825)

Product Description

OTT-S825 is a low viscosity, medium hardness condensation cure silicone rubber. Idea for the pouring of flood moulds, formulated to give precise reproduction. Setting times can be adjusted to suit the size of each individual job by using between 2%-5% catalyst.

Product Applications

OTT-S825 Silicone rubber is used for making:

  • molds of concrete, stone,
  • GRC, statues
  • gypsum decoration,
  • plaster ornaments,
  • fiberglass products,
  • polyester decoration,
  • unsaturated resin crafts,
  • polyresin crafts,
  • polyurethane,
  • bronze casting,
  • wax,
  • candle,
  • sculpture
and silmilar productsProduct Parameters

Tin cure silicone

Typical general characteristics



Model code

Product data

(catalyzed A+B)

OTT-S8 series
HardnessShore A510152025303540
Mix ratioA:B100:3
Pot life25ºC(77F)20-40 mins
Curing time25ºC(77F)3-5 hours
Tear strengthKN/m1016242326262422
Tensile strengthMPa1.


  • Two-part silicon rubber: flowable liquid silicon and tin catalyst.
  • Cures at room temperature within 3-5 hours.
  • An exceptional fluidity and good operability.
  • Good tensile and tear strength, low shrinkage.
  • High duplication times.
  • High elasticity for easy removal of complex replica parts
Installation Instructions

Step 1: prepare the original moldsMake your original molds perfect. fix it on a board. And fix the original mold on a board , then used four piece of board to enclose the original molds . Step 2: Take 100 G parts A silicone rubber and add 3G parts B curing agent and mix them evenly. *Notes: Mold making silicon rubber is a kind of flowing liquid ,it contains two parts. Part A is a kind of flowing white liquid and part B is the curing agent or catalyst .Pls follow the step strictly:1.Weigh the two part exactly by electronic weight. If not, for example add too much catalyst , the operation time will be too fast to operate ,which will cause inconvenience to operate . 2.Mix part A and part B evenly. Otherwise the silicon rubber will be partly solidified and this will give birth to difficulties in your final operation. What's more, the finished molds will meet a short life. All of these will cause a waste of silicon rubber. Step 3: Vacuum pumping(optional)Without exception, this step takes less than 10 minutes. Otherwise, it will cause cross linking reaction, and no more further steps will be available. Step 4: Pouring casting or Brush operation*Notes:1. For simple pattern products we suggest use pouring operation way, which will be very easy to operate and demould. Pourable silicone require low viscosity which will be easy to flow smoothly and easy to de-air . 2.For delicate pattern products we suggest use brushing operation way, which can copy the pattern exactly. Brushable silicone require high viscosity which won't be easy to flow away and easy to brush. 3. We sugges to set the silicone mold for another 12 hours after demould before you put it into a large production.

Our Advantages

1.high quality similar to global big brand2.18 months shelf life3.50-1000 duplication time decided by product sizes4.silicone non toxic, environment delivery within 4-6 days6.shipment by air or by sea is available7.24h after sales service 8.professional R&D team

Packaging & Shipping

Packing : 20KG, 25KG, 200 KG per drum Shipping : by air & by sea Delivery time: within 4-6 days after your payment confirmed in our bank Storage: Storage in cool, dry places. Shelf life: 18 months with the original unopened package


1. What's silicone products you are making?--liquid silicone, silicone rubber, silicone oil; Due to different silicone molds, our silicone has different viscosity, and cause different hardness, density to meet the requests from client. 2. Do you offer free sample to client?--Yes, we can provide the sample for test. 3. How about the quality control in your factory?--We have professional QC team to control the quality during production. Goods will be 100% inspected before shipment. 4. How to remove the bubbles during my mould making?--After mixing liquid silicone with curing agent, please put the material into vacuum machine to take off the bubbles. 5. How to get good silicone mould to use longer time?--The best way is: #A, Please choose the right liquid silicone according to your products. #B, Don't use any silicone oil in mold making, because it can make the silicone mould become too soft to use. #C, Silicone mould can be used longer after the whole silicone mould fully cured, so it's better to wait 2 hours after mould finished. 6. Why silicone rubber add curing agent after mixing a lot of bubbles? --This is normal physical phenomena. The liquid will produce a large number of bubbles in the mixing time, so, it must pass through the vacuum exhaust bubble treatment.

Company Profile

Guangzhou OTT New Materials Co., Ltd. is a leading professional manufacturer of RTV liquid silicone in China. We are a science and technology manufacturer, professionally focus on R&D for liquid RTV silicone, and provide a serial services of silicone such as molding, insoles, sexy dolls, electronics, relative silicone materials and latest developed products, etc

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