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Shenzhen Hong Ye Jie Technology Co., Ltd.
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High strength silicone mold making rubber for concrete statues molds(30 shore A)
1.Mainly application of silicone mold making rubber
Silicone mold making rubber is a two part silicone rubber and curing with tin catalyst. As with a low viscosity, high strength and excellent duplication times, it's widely used for concrete casting and cement products casting,making silicone moldsfor artificial stone,concretestatue molds,garden statue molds,stone molds,cement crafts,GRC/GPR decorations,ect.
The quality of our rtv silicone rubber is similar with Dow corning silicone,wacker silicone,smooth on silicone,but the prices of our silicone rubber is more competitive than them.
2.Features of RTV silicone mold making rubber
a.low viscosity
b.easy operation
c.long shelf life over 12 months
d.high strength and low shrinkage
e.curing at room temperature within 2-4hours
f.high duplication times and no deformation
Model | Our625# A/B | Dow Coring E3481 | Smooth-on Mold Max ® 25T |
Mixing proportion of catalyst(%) | 100:5 | 100:5 | 100:5 |
Hardness (A°) | 23~25 | 21~25 | 25 |
Comparison based on 25 Shore A | |||
Density ( g/cm3 ) | 1.12 | 1.20 | 1.18 |
Viscosity (25 C°,mPa.s) | 19,000 | 25,000 | 25,000 |
Tensile strength (Mpa) | ≥3.0 | 4.0 | 4.0 |
Tear-strength (KN/m ) | ≥25 | 23 | 23 |
Elongation-break(%) | ≥ 400 | 370 | 375 |
Working time (minutes) | 30~60 | 90~120 | 45 |
Curing Time (hours) | 12~24 | 24 | 24 |
Liner shrinkage (%) | 0.3 | 0.2~0.5 | 0.2 |
3.How to making stone mold with RTV silicone mold making rubber ?
Mixing:
Select a mixing container 4-5 times larger than the total volume of material to be mixed.
Weigh out the selected silicon rubber and catalyst. Stir for several minutes scraping the
sides and bottom of the container carefully to produce a homogeneous mixture. When
using power mixers, avoid excessive speeds, which could entrap large amounts of air or
cause overheating of the mixture, resulting in shorter pot life.
The air entrapped in the mixing step needs to be removed to eliminate voids in the cure
product. This can be done by exposing the material to a vacuum of 10-20 mbar. The
material will expand, crest and reduce to about the original level. Degassing is usually
complete about two minutes after frothing ceases.
Curing:
After mixing the two parts combination, the material will cure at room
temperature. Selection of the Beta will determine cure speed, the work life as well as the
demoulding time.
The system is sensitive to changes in heat and humidity and therefore variations in cure
speed may be seen if one or both variables are changed.
Handling and Safety Material Safety Data Sheets are available upon request.
SHELF LIFE: Twelve (12) months from date of shipment when stored at 24°C in original unopened packages.
PACKAGE:Packed in clean 20kg/pail, 200kg/pail.
Any questions about Silicone Rubber, Leah is at your service.
TEL: 086-755-89212382
FAX: 086-755-89948030
MOBILE: 086-189 3886 7561
Website: www(dot)szrl(dot)net
E-MAIL: hyji(at)szrl(dot)net
Skype: leahchou1214
QQ: 189 3886 7561