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Smooth-On / Material reference
Polyurethane

PMC™-790

PMC™-790 is listed by Smooth-On as a polyurethane rubber. The source reports mixed viscosity of 3,000 cps, mix ratio by weight of 2A:1B, pot life of 20 minutes. This record connects 14 reported fields with 2 manufacturer document links. Review the original technical data sheet for the applicable test conditions and processing instructions.

Technical data sheet Safety data sheet
3,000 cpsManufacturer-reported
2A:1BManufacturer-reported
20 minutesManufacturer-reported
48 hoursManufacturer-reported
90Manufacturer-reported
1.07 g/ccManufacturer-reported

Technical & safety documents

2 links
Files open on the manufacturer's document host. Region and language follow the source listing; confirm the revision inside the file.
Open original PDF
TDS
Technical BulletinEnglish · Not specified
Open file
SDS
PMC-790 SDS | EnglishEnglish · United States & Canada
Open file

Reported specifications

14 fields
Material and processing data
PropertyReported valueEvidence
Mixed Viscosity3,000 cpsManufacturer table
ColorClear AmberManufacturer table
Mix Ratio By Volume2A:1BManufacturer table
Mix Ratio By Weight2A:1BManufacturer table
Pot Life20 minutesManufacturer table
Cure Time48 hoursManufacturer table
Shore A Hardness90Manufacturer table
Specific Gravity1.07 g/ccManufacturer table
Specific Volume25.9 cu. in./lb.Manufacturer table
Die C Tear Strength300 pliManufacturer table
Elongation @ Break550 %Manufacturer table
100% Modulus640 psiManufacturer table
Shrinkage<.001 in./in.Manufacturer table
Tensile Strength2,000 psiManufacturer table
Reported values are not independent test results. Original units and table wording are preserved. Extracted TDS rows can depend on the grade, component and source table headings; use the linked page to verify that context. Test methods, sample preparation and cure schedules may differ; consult the original TDS before making a performance comparison.

Selection & processing checks

Distinguish rigid casting plastics, elastomeric rubbers and foams. Their density, hardness scales and processing requirements are not interchangeable.

  • Is this a solid material or an expanding foam?
  • Which hardness scale and cure conditions are reported?
  • What moisture-control and preparation steps does the manufacturer require?
  • Confirm the complete product designation, including any hardener, color or formulation suffix.
  • Read the current SDS for handling, protective equipment, storage and disposal information.

The reported weight ratio for this record is 2A:1B. A weight ratio must not be used as a volume ratio without the appropriate density information.

Missing properties are not estimated. Similar values or shared application labels do not establish a drop-in replacement.

Other materials in this family

View collection
Material / manufacturerFamilyKey specificationDocumentsAdd to comparison
Clear Flex™ 50Smooth-OnPolyurethane250 cpsMixed Viscosity2 linked
Compat™ 45Smooth-OnPolyurethane2,600 cpsMixed Viscosity15 linked
EZ-Mix™ 40Smooth-OnPolyurethaneBrushableMixed Viscosity2 linked
Formlastic™ 48Smooth-OnPolyurethane3,000 cpsMixed Viscosity2 linked
Related records are browsing suggestions, not validated substitutes.