RTV-3040 Clear Mold Making Silicone Rubber

Popular Specifications

36-45A Shore Hardness
100-120 ppi Tear Strength
40,000 cps Viscosity

Elkem RTV-3040, formerly Bluestar Bluesil RTV-3040, is specifically formulated to make clear rubber molds for complex parting lines and features the strength and clarity required in high-end prototyping applications. RTV-3040 Base with RTV-3040 Catalyst provides a 38 Shore A hardness, our most popular combination. The base may also be used with other catalysts resulting in hardnesses from 36-45 Shore A. It is compliant to 21CFR177.2600 (repeated food contact applications).

SKU Description   UM Thick Width Length Height Board ft. Net Wt. Diameter Grade Grit Plys Radius SPB Ship Note Min. Qty Pcs/Box Pcs/Bundle Winding Ft/Box Handle Len Head Diam Head Len Mfg. # Qty
054903 RTV-3040 - Quart Unit EA 2.2
054868 RTV-3020 Catalyst Only 2 KG (4.4 lbs) SO EA 4.4
054823 RTV-3040 - Gallon Unit EA 11
054867 RTV-3020 Catalyst Only 20 KG (44.1 lbs) SO EA 44.1
054857KG RTV-3040 - 20 kg (Base Only) EA 44.1
054931KG RTV-3038 - 2 kg (Catalyst Only) SO EA 4.4
054858KG RTV-3040 - 2 kg (Catalyst Only) EA 4.4
054866 RTV-3045 - 2 kg (Catalyst Only) SO EA 4.4
054871KG RTV-3040 - 200 kg (Base Only) EA 440.9 FRT
054869KG RTV-3040 - 200 kg, Unlined (Base Only) EA 440.9 FRT
054937KG RTV-3038 - 20 kg (Catalyst Only) SO EA 44.1
054872KG RTV-3040 - 20 kg (Catalyst Only) EA 44.1

Click Here to View Our Closeout Page

Important Information

  • Shipping: Freeman charges standard published UPS/FedEx shipping rates (unless freight is specified). All orders under $25 are subject to a $5 small order fee. International orders are subject to a $250 minimum order.

  • Liquid products are sold by weight, not volume.

  • SPB = Sheets per Box

  • HAZ-G = Hazardous material, cannot ship air, up to $33 surcharge applied for each package shipped ground within the US.

  • HAZ-A = Hazardous material, cannot ship air, no surcharge for ground shipping.

  • HAZ-T = Toxic material, must be sent by freight carrier.

  • FRT = must be sent by freight carrier due to size, weight, or hazardous classification.

Product Table Legend

  Special Order

Minimum quantities and extended lead times may apply. Cannot be cancelled or returned once processed.


This item is not stocked in Freeman warehouses and may be subject to extended lead times.

  Limited Stock

Due to limited stock availability, extended lead times may apply.

  Closeout Item

Available at special pricing on our closeout list. Subject to prior sale.

  Web Discounts

Item is discounted for quotes or orders completed on the website only.

/  Favorite Items

When logged in, select your favorite items in the table and view later in "My Account".