Silicone Tin RTV
R-1828 A / R-1824 SP B (25A Shore)
R-1828 A / R-1824 SP B is a room temperature vulcanizing silicone rubber intended primarily for pour and brush-on molds with fast cure time 6-8 Hours. It is also used as a general purpose, high strength rubber. Features:
*Excellent Physical Properties with High Tear Resistance.
*Low Viscosity and Greater flow control for brush-on molds
*Produces Mold with a Long Working Life.
Physical Properties of Liquid Material
Color: Off-white/ Blue or Red
Viscosity @ 25C: 50,000 cps- unmixed 30,000 cps – mixed
Shelf Life: 6 months in a closed container
Typical Properties of Cured Rubber
R-1824 SP B R1800TH-B (Brush-On)
Specific Gravity: 1.12 1.12
Hardness: 25 23 shore A
Tensile Strength: 495 psi 670 psi
Elongation at Break %: 490 410
Tear Resistance: 125 95
Color Blue Red
Method of Use:
R-1828 A is processed by adding the curing agent R-1824SP B. The addition of 10% catalyst (by weight) has a pot life of 35 minutes and is ready for de-molding after 6-8 hours. R-1824SP B has a trace of pigment for good dispersion. After the mold has been removed from the master, it should be left for 24 hours in order to develop its maximum mechanical strength.
For Brush-On Molds, use R-1800th B catalyst in place of the pour mold catalyst R-1824 SP B.
For quick cure, add extra R-1824SP B (12%) for a 3-4 hour de-mold time or use Rapid Set 10 drops/lb for a 1 hour cure. Curing a mold quickly with extra catalyst or Rapid Set decreases the shelf life of molds in storage and affects physical properties of RTV.
The information and data contained herein are based on information we believe reliable. Each user of the material should thoroughly test any application and independently conclude satisfactory performance before commercializing. Suggestions of uses should not be taken as inducements to infringe on any particular patent.