#1 Place for Craft Supplies, Art Supplies, Artist Materials and Kids Crafts

High Strength 3 RTV Mold Making Rubber

by Alumilite


HSIII mold rubber recreates minute details, is chemical resistant, very durable and easy to work with. HSIII is a high tear strength RTV rubber with exceptional flexibility and tear strength. Great for molds with deep undercuts. RTV mold rubber vulcanizes (cures) at room temperature in 24 hours. This kit contains enough catalyst and rubber base to mix 1 pound of mold making powder. You should get 30 to 50 parts per mold. Mold making instructions not included, recommended for advanced mold makers.

Product specifications:
Mix Ratio 10:1
Mixed Viscosity 150
Specific Gravity 1.16
Pot Life 2 hrs.
Demold Time 24 hrs.
Platinum/Tin Cure Tin
Hardness 10
Color Pink
Linear Shrink (%) .48
Tear Strength (ppi) 110
Elongation 575%
Tensile Strength (psi) 400
Temperature Range (F) -67-392


Share on Facebook Twitter Pinterest

Ask a question about High Strength 3 RTV Mold Making Rubber Ask a question about this product

High Strength 3 RTV Mold Making Rubber

by Alumilite

Average User Rating: Based on (4 Reviews)

5 4

Bruce D from Michigan says:

HS3 is a great solution for many molding needs. I have used large amounts for many mold projects from copying cabinet knobs to even duplicating the body of inert hand grenades as gifts to friends who...[more]

[Read All Reviews] [Write a Review]









  Item# Image size
Ascending
description Manufacturer Number List Price
Non-Member
Price
VIP Member
Club Price
Quantity
Add to Favorites
22813
High Strength 3 RTV Mold Making Rubber 1 lb. HSIII RTV
Zoom Image
1 lb. HSIII RTV 20500 $24.76 $22.28 10% Off $21.05 15% Off

Click the to add item to your Favorites.

Add to Cart


Please wait...
You May Also Like...

Rubber to Rubber Mold Release

by Alumilite

Increase your molds' lifespan

From $3.06

1 oz. Graduated Measuring Cups

by Alumilite

Increase the lifespan of your rubber molds

From $4.25

Transparent Dyes

by Castin' Craft

Add see-through color to polyester or epoxy resin

From $4.91

How to get VIP Club Prices
Anyone can be a VIP Member with:
  • Additional savings on all products
  • Express order handling
  • Exclusive promotions
  • Priority customer service
Only $25/year

Learn More »

Ask a Question About High Strength 3 RTV Mold Making Rubber

Your email will not be shared. We will only use your email address to respond to your question. When asking your question, please be as descriptive as possible, it will allow us to give you the most accurate answer possible.

Customer Product Reviews
Write a Review
Write a Review
Rated by: Bruce D in Michigan
HS3 is a great solution for many molding needs. I have used large amounts for many mold projects from copying cabinet knobs to even duplicating the body of inert hand grenades as gifts to friends who collect military items. It is very strong when cured and will even copy a medium threaded surface with ease. Yes it can be messy, but I overcame the messy pour issues by mounting a large plastic plumbing valve to a air tight container. But with the make shift spigot, it takes awhile to transfer to a mixing container but I found it worth while to work on preparing my items to be cast while the quite thick silicon transfers to the mixing container. (Up to 30 mins for about 6 to 8 ounces) I guess you need patience to do it my way, but I am always happy with the result. All told, a great product for molding fine details...
Rated by: M. in Ct
This product is fantastic! I used a few other mold making products that didn't work nearly as well, and the price is really reasonable!
Rated by: J B. in Port Allen, LA
Good, tough, stuff. This stuff is a lot harder than some other mold making material that I've worked with. Very tear resistant. Somewhat messy and difficult to work with because it's so thick (like molasses in January). Instructions give ratios by weight and volume.
Rated by: Graphi . in ,
Highly recommended product! Cures at "Room Temperature Vulcanization" = RTV Although this product says it is recommended for advanced mold makers... It is really quite easy and safe to use. Excellent Product at a realistic price!

Write a Product Review for High Strength 3 RTV Mold Making Rubber

Add Your Review

Tell us what you think. We appreciate you taking the time to share your opinion with other artists and crafters. Please keep your review detailed and specific.

Product reviews are intended to be a resource for artists interested in product quality and use. MisterArt.com reserves the right not to post any product review or to remove any published product review at any time without notice. Published reviews must conform to MisterArt.com guidelines. Your review may be posted on this page within five to ten business days.

Tips on Writing Reviews
Rating Scale
  • (5-Star) Excellent
  • (4-Star) Good
  • (3-Star) Average
  • (2-Star) Fair
  • (1-Star) Poor
Do:
  • Give your perspective on how you used the product and why you liked or disliked it.
  • Keep your reviews short enough to hold the audience's attention.
  • Be honest and mindful of others when providing editorial commentary.
Don't:
  • Include phone numbers, addresses, URLs, or HTML tags.
  • Write profanity, obscenities, vulgarities, or spiteful comments.
  • Make defamatory comments.
Please wait...
Please wait...