1kg/drum,5kg/drum,20kg/drum,25kg/drum or 200kg/drum of Part A base silicone rubber. 0.25kg/bottle,1kg/bottle and 10kg/bottle of Part B organic tin Curing Agent.
Within 3-5 days after payment
Good flowability and long working time
High tear and tensile strength
Easy de-mould from complex replica par
RTV silicone rubber for make mold
Features Good flowability and long working time Medium hardness High tear and tensile strength Easy de-mould from complex replica parts Acid and alkali-resistance Low linear shrinkage
Application RX-725 is suited for reproduction of cement molding, concrete stones, artificial stones, plaster molding, figures, art objects, decoration molding, GRC products, gypsum products, resin products ,PU molds. etc..
Description RX-725 mold making silicone rubber is a two-component material silicone rubber,consisting of Part A base silicone and Part B organic tin curing agent,cures at room temperature by a condensation reaction.These materials can be cast into the cured silicone mold:plaster,polyurethane,PU,GRC,cement,resin,polyester,wax etc..
Standard Datasheet of RTV silicone rubber for make mold
Gel-type Components A B Appearance (liquid) transparent : White Mixing ratio : 100 :2 Viscosity (Pa.s) : 25000
Hardness shore A: 27±1
Shrinkage rate(%): ≤0.2 Pot life(25C) (mins) : 30-40 Curing time (mins): 24h Tensile strength (Mpa) : 3.6 Elongation at break (%): 560
Tear strength shore A: 36
How to make the silicone mold The surface of the original should be clean and free of loose material.If your products with thin flower patterns ,and especially with porous substrates,pls use a suitable mold release agent such as soap water,detergent,waseline or petroleum jelly.
Mixing Please weight 100 Part A base and 2 parts of organic tin Curing Agent in a clean container.Thoroughly stir Part A base silicone before use, as filler separation may occur upon prolonged storage. Mixing Part A and Part B evenly until part B completely dispersed in the base. Hand or mechanical mixing can be used,but do not for an extended period of time or allow the temperature to exceed 35°C. Mix suitably small quantities to ensure thorough mixing of base and curing agent.
It is strongly recommended that entrapped air be removed in a vacuum chamber,allowing the mix to completely expand and then collapse. After a further 1—2 mins under vacuum,the mix should be inspected and can be used if free of air bubbles. A volume increase of 3—5 times will occur on vacuum de-airing the mixture. So a suitably large container should be chosen.
Pouring the mixture and curing Pour the mixed Part A base silicone and part B organic tin curing agent as soon as possible onto the original,avoiding air entrapment.The catalyzed material will cure to a flexible rubber within 6 hours(or faster by different mixing ratio or room temperature),we advice you de-mold after 24 hours ,it is will improve the replicate times of silicone mold.
Storage When stored at or below 30°C in the original unopened containers,SILASTIC RX-725 Base and Curing agent have a usable life of 12 months.from the date of production.After 12 months stock,pls use the Stir to mixing the Part A silicone for some mins, then the silicone can be use again,no influence for other performance.
Packing 1kg/drum,5kg/drum,20kg/drum,25kg/drum or 200kg/drum of Part A base silicone rubber. 0.25kg/bottle,1kg/bottle and 10kg/bottle of Part B organic tin Curing Agent.
Note This product is neither tested nor represented as suitable for medical or pharmaceutical uses. Not intended for human injection. Not intended for food use.
Any questions about the iterm,please don't hesitate to contact Ivy .
Dongguan Rongxin Silicone Technology Co., Ltd. was founded in 1999, and is located in Dongguan, Guangdong. We are a professional silicone material manufacturer, integrating the R&D, production and sales. Main products are Condensation molding silion rubber, Addition molding silicone rubber,Addition electronic potting silicone rubber,Condensation electronic potting silicone rubber,leather printing roller silicone rubber,LED strip light silicone rubber,human casting silicone rubber and so on. ... View detail