A PRIMER ON SILICONE RTV
 
RTV stands for "Room Temperature Vulcanizing". This means that the silicone will cure at room temperature, without the need of expensive oven heating. However, the higher the ambient temperature, the quicker RTV cures.

There are two basic types of silicone mold making products available. They are Polycondensation or Tin Cure and Polyaddition or Platinum Cure.

The Polyaddition/Platinum Cure is the most expensive of the two. It offers better mold stability and less shrinkage. However it is susceptible to inhibition from a wide variety of materials, and must be handled very precisely to produce a good cure.

Polycondensation/Tin Cure silicone is less expensive, has a virtually trouble-free cure, and is not sensitive to inhibition. This is the kind of silicone in TAP Silicone RTV System.

On the following pages you will see instructions using the Rhodorsil RTV2. Please note that even though the name is different, the instruction also applies to TAP Silicone RTV System. We hope you find these pages helpful in your mold making journey.

TAP SILICONE RTV SYSTEM FOR IMPRINT AND REPRODUCTION
 
TAP Silicone RTV System used in moulding are two-component, room temperature curing elastomers.

TAP Silicone RTV System silicone elastormers have specific properties which provide users with many advantages;

Polycondensation type TAP Silicone RTV System is supplied as base and catalyst, polyaddition type TAP Silicone RTV System is supplied as Part A and Part B.

Each of these types have specific features that means it must be chosen according to the user's requirements.

POLYCONDENSATION RTV2

Curing starts once the two components are mixed at a rate that depends on the operating conditions. The ideal conditions are;

In order to comply with dimensions it is preferable to use;

moderate temp. 23 - 30°C and
in any case no less than 20°C
minimum 30% humidity
comply with the recommended
catalyst dosage

INTRODUCTION

RTV2 APPLICATIONS

MOULDING TECHNIQUES

PREPARING THE MODEL

ADVICE TO USERS