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Medical Grade Liquid Silicone

Transparent Medical Silicone Gel SI2721◆Detailed Product DescriptionSI 2721A/B is two component transparent silicone elastomer catalyzed by platinum. After mixed, Part A and Part B will cure to flexib

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Transparent Medical Silicone Gel SI2721

◆Detailed Product Description

SI 2721A/B is two component transparent silicone elastomer catalyzed by platinum. After mixed, Part A and Part B will cure to flexible removable material to stick with skin with cushioning. This adhesive has unique physical property. It’s proper to be used in biomedical as bonding and self-adhesion material. This elastomer is made from PDMS catalyzed by platinum. Curing temperature range: room temperature to 200℃。It won’t

produce any by-product.


1.Solvent free two component material

2.Transparent both before and after curing

3.Platinum catalyzed curing system

4.No by-product after curing

5.Low viscosity before curing, easy to application

6.Excellent flexibility, absence of stress

7.Extremely low oil exudation, good anti-poisoning

8.By adjusting the mix rate of part A and part B, then can adjust the bonding strength of the adhesive

9.It can repeat to stick

10.It can use with polyethylene release liner

11.Tested by physiological compatibility, poison cell, skin stimulus etc.


1.Proper to skin stick, used to wound stick, Scar elimination, eye mask and Nipple cover

2.Also used to fill the cover bag of headrest, seat lumbar pad etc.

◆Data Table

Properties before curing


2721 A

2721 B





Transparent Liquid

Transparent Liquid

Viscosity, mPa·s(25℃)



Density, g/cm3(25℃)



Mixture/mass ratio

A:B = 100:(80-120)

Viscosity after mixing(mPa·s(25℃)


Operation time after mixing,min(25℃)

> 60 mins

Curing condition,  min,25℃

25℃/ 360 mins or 120℃/ 5 mins

Properties after curin


Transparent Gel

Service temperature,℃

- 60 ∽ 200


①All data above were tested under standardized condition.

②All data listed in the chart were for the generalized item in the series; please refer to the related data sheet for special items.

③Storage condition has a direct impact to the products’ shelf life, Please refer to the instruction for special items’storing.


1.Mixing uniformity in the packing before using.

2.Maxed A, B component as the weighing ratio of 1:1, mixing, stay for 10mins and injected to the protection components (or modules) which need potting directly. In order to reduce the bubbles, injected slowly along the walls of the implement..

3.Let the components sit,out of bubble by themselves,heat curing (In 120℃, needs about 2-5mins,depending on the thickness of the adhesive), or curing in the room temperature after the bubble disappeared,need about 6-10hours.

4.About potting equipment please contact our Marketing Department


1.It can improve the performance of the hardened by vacuum defoaming for mixed component.

2.After use, please seal the package.

3.The curing speed will be slow in the low temperature, suggest workshop in constant temperature.The temperature is too low will lead curing speed Pianman, the proposed workshop thermostat

4.Once SI2721 contact with sulfur, amine, tin material would be difficult to sclerosis.

◆Package and Storage


1.Component A ; 20kg Plastic Barrel ;Component B ; 20kg Plastic Bottle

Component A ; 20kg Metal Barrel ;Component B ; 20kg Metal Bottle

2.Other packing can be customized


B component should be keep in cool and ventilative place

Shelf life: 12 months (25℃)

Transportation as non-dangerous material.

◆Safety Operation Material

MSDS isn't included here. Please read TDS, MSDS and label carefully before operation.You can get MSDSfrom SEPNA or other distributors, or mail to service center, or call +86-400-882-1323.

◆Product Warranty

All product properties and application details based on information believe to be reliable and accurate. But you still need to test its property and safety before application. The advices we supply don't apply in any circumstances. SEPNA don't make assurance of any other applications outside the specification until SEPNA supply a special written guarantee. SEPNA is only responsible to replace or refund if this product is defective within the warranty period stated above. SEPNA makes it clear that will not be liable of any accidents.

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