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Latex Storage and Winter Weather

October 30, 2017

Latex is a great mold making material that makes durable, long lasting molds for concrete, plaster, hydrocal and other non-exothermic casting materials. Finished latex molds have a long library life when properly stored as well. However, winter is coming and that can mean issues with shipping and storing uncured latex.

DO Not use Liquid Mold Making Latex on human skin!

Our AeroMarine Products Mold Making Latex is a creamy white color with a smooth texture when uncured. It cures to a light beige color. Here is what our uncured, properly stored latex looks like:

To keep your latex viable, it needs to be stored indoors at a temperature between 60F and 72F. If the latex gets below 60F, it can freeze which ruins it. Frozen latex becomes clumpy and cottage cheese like and unusable. Once the latex has frozen, it cannot be revived and used again. Here is what latex that has been frozen looks like:

  Before and after stirring 

Do not store your latex in a garage, basement, shed or any other unheated building during winter. Proper latex storage should be indoors in a heated building in a locked cabinet or closet, away from any pets or small children. When kept at the appropriate temperature, your latex should last for six months.

On the shipping side of things, we put big “PROTECT FROM FREEZING” stickers on all the latex we ship out during the months of October-April. When shipping the latex to the East Coast and other colder climates, we also generally ship 3 day shipping instead of ground during the colder months. This reduces the time the latex may spend in cold weather in transit. We ask UPS to require a signature on latex shipped during the winter to ensure that no packages containing latex are left on porches during cold weather. This method works well. We generally don’t have an issues with our customers receiving frozen latex. However, if you receive frozen latex, you can email us a picture of the latex ASAP and we will send you a replacement.

Remember, proper latex storage is indoors, between 60F and 72F.  Latex should be used within 6 months from date of delivery. Remember to check the Technical Data Sheets for any other materials that you may be storing over the winter. Many have special temperature and storage requirements. You can also read these blog posts for more information:

Curing Issues- Trouble Shooting

If you have any other questions, drop us an email at [email protected] or give us a call Monday-Friday 9am-4pm Pacific time at 877-342-8860.

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