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Urethane Potting Compound

RTV Polyurethane Potting Compound for electronics SP2204◆Detailed Product DescriptionSP2204 is two component no solvent RTV/Heating curing resin elastomer compoundFeatures1.Low viscosity,


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RTV Polyurethane Potting Compound for electronics SP2204

◆Detailed Product Description

SP2204 is two component no solvent RTV/Heating curing resin elastomer compound


1.Low viscosity, easily process

2.Excellent performance on low-temperature and aging

3.Excellent and stably electrical dielectric

4.Very low Water absorption 

5.Good adhere to most metals and plastics


It’s specifically formulated for automotive sensors, switches, and other electrical devises requiring environments protection.

◆Data Table

Model Number






Translucent Fluid, light yellow

Transparent Fluid

Viscosity, cps(25℃ )

1300 ± 500

40± 20

Gravity, g/cm3



Mixing ratio, by weight

A:B = 100 :46-60

Water absorption, after 30 days immersion

<0.15 %

Dielectric strength, kV/mm, 25℃


Volume resistivity, DC500V,Ω·CM


Dielectric loss factor, 50HZ


Working Temperature, ℃


MAX Temperature, Short time, ℃


Mixing Quantity (A/B), g


Temperature, ℃


Mixing time, S


Gel time, min



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.



Material preparation: Stirring in the original drum, then pouring into dispenser.

To avoid bubbles inside of finished products, both tank should be usually kept 40 to 60 minutes under the vacuum pressure 0-2mmHg.

Max tolerance: Mixing proportion of deviation may affect mechanical properties, tolerance should be less than 1%.

Other: Through the production, should always maintain the tank airtight . the compressed gas should be dry if need, otherwise part B will become sticky, and influence the mechanical properties.

Suggestion of molding condition

Machine    low pressure Pouring machine 

Mould temperature    50-60 ℃

Material temperature  

Part A   25-30 ℃ 

Part B   25-30 ℃                        

Demoulding time  10~60min 

Manual process

Temperature: Before using, keep the material under 25 ± 2℃ to ensure its reactivity and viscosity.

Mixing:weigh the material at a ratio according to the above.

Preparation:Dry all containers and mould in 70-80 ℃ oven for 1-2 hours to remove moisture.

Process : put A and B into a container. Mixing 1-2 minutes. Degassing under 0.1 Mp negative  pressure to avoid the bubble. then potting smoothly . Should avoid the excessive speed to involving into air bubbles. 

Cleaning: cleaning the containers by organic solvents, such as acetone and chloroform,etc.

Comparison between the ratio and hardness

SP2204 A : SP2204 B           hardness (DIN 53505)

100 : 60                                70 Shore D

100 : 55                                65 Shore D

100 : 46                                90 Shore A

◆Package and Storage


Each part is 200kg/pail            

Transported as general chemical    


The opened drum should be sealed

Avoid moisture, and be used out in a short time

Shelf life: 12months for part A; 6months for part B                                  

◆Safety Operation Material

MSDS isn't included here. Please read TDS, MSDS and label carefully before operation.You can get MSDS from Sepuna 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. Sepuna don't make assurance of any other applications outside the specification until Sepuna supply a special written guarantee. Sepuna is only responsible to replace or refund if this product is defective within the warranty period stated above. Sepuna makes it clear that will not be liable of any accidents.

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