BOSS - 03970GY10 - 125-03 Multi-Seal Construction Sealant, Grey

Item Number: BOSS12503  MFR Part Number: 03970GY10


Multi-Seal Building Construction Sealant, Standard Cartridge, Grey
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Boss® 125 Multi-Seal™ Building/Construction Sealant Is A Multi Purpose, One Part Sealant, Formulated with USP Technology. This Unique Sealant Is Free From Solvents and Isocyanates. It Cures On Exposure To Atmospheric Moisture To Form A Highly Durable Flexible Sealant.

Boss® 125 Multi-Seal™ Has Been Formulated To Offer Outstanding Primerless Adhesion To Most Common Building Materials Including Vinyl, Aluminum, Steel, Concrete, Wood and Glass. It Can Be Applied and Tooled Under Most Weather Conditions. This Sealant Is Paintable with Most Latex Base Paints.


  • Wide Temperature Gunnability; Can Be Applied In Any Season, Excellent Sub-Zero.
  • Primerless Adhesion To Damp and Non-Porous Surfaces
  • Voc Compliant In All 50 States
  • Qualifies For Leed Credits
  • Ease Of Use, One-Part Adhesive Sealant, No Mixing Required
  • Good Weatherability - Virtually Unaffected By Sunlight, Rain, Snow, Ozone, and Temperature Extremes
  • Good UV Resistance and Color Stability
  • Long Life Reliability; Cured Sealant Stays Flexible Without Tearing, Cracking, Drying Out, or Becoming Brittle.
  • With Its Non Slump Properties, Can Be Used In Vertical, Horizontal and Overhead Joints
  • Non-Yellowing and Non-Staining
  • Non-StreakingPaintable with Most Latex Base Paints* (Except Translucent)
  • Free From Solvents and IsocyanatesBonds To Kynar 500

California residents: see Proposition 65 Warning

Weight0.8 Pounds (Lb)
Width2 Inches (In)
Height11.25 Inches (In)
Country of OriginUSA
Length2 Inches (In)
Service Temperature-40°F to 200°F (-40°C to 93.3°C)
Application Temperature-35°F to 140°F (-37.2°C to 60°C)
CoverageNone specified
Dry Time7 Days
Flash Point200° C
Shelf Life1 Year from the date of shipment
Solids Content> 98%
Storage Temperature>90°F (32.2°C)
UV ResistantYes
Tensile Strength180 psi
ApplicationMulti-Purpose, One Part Sealant Formulated With Usp™ Technology To Offer Outstanding Primerless Adhesion To Most Common Building Materials, Even When Wet Or Damp! Comes In An All-Weather Plastic Cartridge To Never Slow The Job Down.
ApprovalsMeets performance reuirements of TT-S-000230C, Type II, Class A; ASTM C920, Type S, Grade NS, Class 25, Use NT-non traffic, G-glass, M-mortar, A-aluminum and O-other; CAN/ CGSB 19.13-M87.
Comments/NotesCan Contribute Credits
CompositionUltra Synthetic Polymer
Fire RatingNone specified
For Use Withvinyl, aluminum, steel, concrete, wood and glass
RatingsTT-S-000230C; ASTM C920 Class 25
Size10.1 Ounce
StandardsTT-S-000230C, Type II, Class A; ASTM C920 Type S, Grade NS, Class 25, Use NT, G, M, A, and O; CAN/CGSB 19.13-M87
Temperature Range-40°F to 200°F (-40°C to 93.3°C)
TypeGeneral Purpose
Viscosity400 g/min
UL ListedNo
UL RecognizedNo