Why do bubbles form when adding the curing agent?

This is a normal physical phenomenon where mixing creates bubbles. You must use vacuum exhaust bubble treatment to remove them before pouring.

What is the mixing ratio for this silicone rubber?

The standard mixing ratio is 1:1 by weight. You must weigh Part A (platinum catalyst) and Part B (silicone rubber) exactly using an electronic scale.

What are the storage conditions and shelf life?

Store in cool, dry places. The shelf life is 18 months for the original unopened package.

2026 New High Quality Grade Liquid RTV2 Silicone Rubber Soft Mold Making

Name: 2026 New High Quality Grade Liquid RTV2 Silicone Rubber Soft Mold Making
Brand: GUANGZHOU OTT NEW MATERIALS CO., LTD.
SKU: 2198210955

Guangdong, ChinaGUANGZHOU OTT NEW MATERIALS CO., LTD.

US$5.99-7.88

1 kg

Sample price:US$8.00/kg.Request sample

Product profile

Customization

Available

Raw Material

Natural Rubber

Material

Silicone Rubber

Model NO.

OTT-J820

Appearance

Liquid Silicone

Form

Liquid Rubber

Mixing Ratio

100:3, 100:2, 100:5

Working Time/Pot Life

30~50min

Curing Time

3~4h

Shelf Llife

18 Months

Transport Package

Plywood Pallet

Specification

5kg, 20kg, 25kg, 200kg, 1000kg drum

Trademark

OTT

Origin

China

HS Code

39100000

Production Capacity

8000kg/Day

Key features

Food-Grade Platinum Cured: Two-part liquid silicone, food-grade certified, cures at room temperature for safe applications.

High Precision & Detail: Low shrinkage (<0.1%) and excellent fluidity ensure fine detail replication for complex molds.

Durable & Strong: High tear strength and tensile strength provide long-lasting molds with excellent deformation resistance.

Versatile Viscosity Options: Available in 9 hardness grades (0-40 Shore A) with viscosities from 1300 to 7000 mPa.s for pouring or brushing.

Chemical & Heat Resistance: Excellent resistance against heat, acid, alkali, and aging ensures stability in harsh environments.

Easy Mixing & Operation: 1:1 mixing ratio with 20-50 min pot life allows easy manual mixing and simple mold making.

Wide Application Scope: Ideal for jewelry casting, rapid prototyping, vacuum foaming, and reproducing sculptures or resins.

Long Shelf Life: Unopened package maintains quality for up to 18 months when stored in cool, dry places.

Company profile

GUANGZHOU OTT NEW MATERIALS CO., LTD.

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2022-07-27 CertifiedNearest Port: Shenzhen Port, Guangzhou PortAverage Response Time: ≤6.89h CertifiedTerms of Payment: LC, T/T, PayPal, etc.

About Our Factory & Business Background

AddressFirst Floor Building A1 Tangkou 236 Industrial Zone, Tuanjie Village, Xinhua Street, Huadu District, Guangzhou, Guangdong, China

Plant Area1700 square meters

Number of Employees17

Registered Capital5,000,000 RMB

International Commercial Terms(Incoterms)FOB, CIF, CFR, EXW, DDU

Average Lead TimePeak Season Lead Time: within 15 workdays Off Season Lead Time: within 15 workdays

Our Production Capability & Technical Expertise

Main ProductsRTV2 Liquid Silicone Rubber, Molding Silicone Rubber, Platinum Cured Silicone Rubber, Tin Cured Silicone Rubber, Pad Printing Silicone Rubber, Electronic Potting Silicone Rubber, Life Casting Silicone Rubber, Insole Silicone Rubber, Silicone Resin Powder

Production MachinesKneading Machine, Grinding Machine, Mixing Machine

R&D Engineers2 people

Own BrandYes

Our Industry Experience & Global Business Record

Year of Establishment2014-07-15

Main MarketsNorth America, South America, Europe, Southeast Asia/ Mideast, Africa, East Asia(Japan/ South Korea), Australia, Domestic

Number of Foreign Trading Staff5

Overseas Agent/BranchNo

Product Q&A

Q:What types of silicone products do you manufacture?

We produce liquid silicone, silicone rubber, and silicone oil. Our silicone varies in viscosity, hardness, and density to meet specific client requirements for different mold applications.

Q:Do you offer free samples for testing?

Yes, we can provide free samples for clients to test the product quality before placing an order.

Q:How do you ensure quality control during production?

We have a professional QC team that controls quality throughout the production process. All goods are 100% inspected before shipment to ensure they meet standards.

Q:How can I remove bubbles during mold making?

After mixing the liquid silicone with the curing agent, place the material into a vacuum machine to remove the bubbles effectively.

Q:How can I make my silicone mold last longer?

Choose the right liquid silicone for your product, avoid using silicone oil as it makes molds too soft, and allow the mold to fully cure for at least 2 hours after finishing before use.