THI-VEX Silicone Thickener

Thixotropic Agent for Thickening Smooth-On Silicone Rubbers

THI-VEX™ Silicone Thickener is a liquid additive made especially for thickening Smooth-On’s Mold Max™ Series (tin catalyst), Smooth-Sil™ Series (platinum catalyst) Rebound™ 25 (platinum catalyst) and Dragon Skin™ Series (platinum catalyst) silicone for vertical surface application (making brush-on molds). Different viscosities can be attained by varying the amount of THI-VEX™.  THI-VEX™ is skin safe and certified by an independent laboratory.

NOTE: THI-VEX™ is not compatible with Mold Max™ 40, Mold Max™ 60 or OOMOO™ silicone rubbers. THI-VEX™ is added as a percentage of Part A and must be thoroughly mixed with Parts A and B.

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ProductSizeNet WeightPrice


Thickening Agent For Silicone Rubbers.
1 ounce 0.06 lb. 371
Pint Unit 1 lb. 2209
Gallon Unit 8 lbs. 15360
5 Gallon Unit 40 lbs. 73839

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Technical Bulletin

Safety Data Sheet


All Reynolds locations will be closed Friday & Saturday, April 7th - 8th in observance of Easter Weekend. Resuming normal operations on Monday, April 10th.