PlatSil® 73-20 Silicone Rubber

PlatSil^® 73-20 Silicone Rubber

Price:	$282.00

PlatSil^® 73-20 Silicone Rubber is a two-part, platinum-catalyzed, liquid silicone system that cures (RTV) to a blue translucent, Shore A20 rubber. Compared to other silicones in the PlatSil^® 73-Series line, this option sets quickly with a demold time of 1 hour (at room temperature). The transparency of PlatSil^® 73-20 is useful for molds that need to be cut after cure – parting lines can be better determined because the model is visible. This is a pourable rubber, but it can be easily thickened with PlatThix Liquid Thickener or Fumed Silica for brush-on application.

View all PlatSil^® Silicone Mold Rubbers.

Looking for larger sizes (e.g., drum kits)? Please call Customer Service (800-858-5990 or 610-559-8620) or email sales@polytek.com.

This 16-lb kit includes:
8 lb of PlatSil^® 73-20 Part A (~1 gallon)
8 lb of PlatSil^® 73-20 Part B (~1 gallon)

Specifications & Product Information

Mix Ratio	Shore Hardness	Pour Time	Cured Color	Mixed Viscosity	Specific Volume	Demold Time	Shrinkage Upon Cure
1A:1B	A22	5 min.	Blue Translucent	3,000 cP	25.0 in³/lb	1 hr.	Nil

Product Literature

Accessories

Add PlatSil^® 71/73 Part X Accelerator to PlatSil^® silicone rubbers to accelerate the pour times and cure times.

PlatSil^® 71/73 Part X Accelerator

Add PlatSil^® 71/73 Part R Retarder to PlatSil^® silicone rubbers to slow the pour times and cure times.

PlatSil^® 71/73 Part R Retarder

Add PlatThix Liquid Thickening Agent to PlatSil^® Silicone Rubbers to thicken the liquid mix for brush-on application.

PlatThix Liquid Thickening Agent

A fine powder that can be added to polyurethane and silicone liquid rubbers to thicken them for brush-on/lay-up applications.

Fumed Silica

Use Silicone Color Pigments to color liquid silicone rubbers (TinSil^® and PlatSil^® rubbers).
7 colors available.

Silicone Color Pigments

Aerosol spray release agent that can be washed off of models. Can be applied to sealed or non-porous models for use with liquid silicone rubbers.
Also use to extend the mold life of silicone rubber molds when casting certain materials.
Can be applied to polyurethane rubber molds when release agent needs to be washed off of cast parts (to more easily accept paint), but the mold will degrade faster than when using Pol-Ease^® 2300 Release Agent.

Pol-Ease^® 2500 Release Agent

Add Silicone Fluid sparingly to liquid silicone rubbers (TinSil^® & PlatSil^®) to thin the mix and soften the cured rubber.
Also results in loss of strength and cure speed.

Silicone Fluid (50 cSt)

Accurately weigh Polytek rubbers, plastics and foams with a digital scale (200-lb capacity & 5,000-g capacity available).

Digital Scales

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PlatSil^® 73-20 Silicone Rubber