NaturForm™ 74 Molding Latex Rubber


Polytek® NaturForm™ 74 Molding Latex Rubber is a high solids (70-74%) natural latex with excellent tear strength and elongation properties. To make a mold, multiple layers of this latex are brushed (spray application is not recommended) onto an original model to form a tough rubber blanket mold (each layer must dry before the next layer is applied). These thin molds are typically backed with a supportive mold shell.

Molds made with natural latex are often used for casting plaster, concrete (e.g., veneer stone manufacturing and statuary) and limited casting with some resins.

For a latex with lower solid content (58-62%), select NaturForm™ 60-R Molding Latex Rubber (with internal mold release) or NaturForm™ 60 Molding Latex Rubber.

NOTES: Exposure to temperatures <40°F and >80°F may damage latex, causing irreversible coagulation. DO NOT ALLOW TO FREEZE. Always store and use at room temperature.

SHIPPING: Latex cannot be shipped in temperatures near or below 32°F. Expedited Shipping Service is available at an additional cost, but cannot be purchased online. Please call Polytek Customer Service (1-800-858-5990) for more information.

WARNING: This product can expose you to chemicals including o-phenylphenate, sodium which are known to the State of California to cause cancer. For more information, go to


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Technical Specifications

Cured Color:
Percent Solids:
Density of Liquid Latex:
8.10 lb/gal
9000-15000 cP
Read the NaturForm Technical Bulletin for detailed mold making instructions.
Shelf Life & Storage of Liquid Latex:
Use liquid latex within three months. For best results, store products in unopened containers at room temperature (60-90°F). Exposure to temperatures <45°F and >80°F may damage latex, causing irreversible coagulation. DO NOT ALLOW TO FREEZE.

More Information

Material Calculator

Technical Bulletin

Safety Data Sheet