Sealants
3M Aerospace Sealant AC-251 (Black, Class B)
SKU: AC-251
Brand: 3M
Pricing on request
Specifications
| Part Number | AC-251 |
|---|---|
| Material | two-part, manganese dioxide-cured polysulfide, solvent-free |
| Compliance | Boeing MAT-587 qualified (Class B-1/2, B-2) per distributor listing |
Description
A two-part, quick-curing, solvent-free polysulfide sealant formulated for sealing aircraft windshields, canopies and windows and for exterior mold-line applications. Supplied as a black, non-sag thixotropic paste that holds its shape on vertical and overhead surfaces, does not craze, and gives excellent adhesion plus UV/weather and fuel resistance on acrylic, glass and polycarbonate transparencies.
Angad Aviation supplies this 3M product with full traceability and documentation — request a quote for current pricing, pack sizes and lead time.
- Brand: 3M
- Part No.: AC-251
- Chemistry: two-part, manganese dioxide-cured polysulfide, solvent-free
- Color: black
- Form: non-sag thixotropic paste; injection gun or spatula
- Application life classes: B-1/2, B-1, B-2 (~0.5 / 1 / 2 h)
- Cure: ~4 h / 7 h / 9 h respectively
- Substrates: acrylic, glass, polycarbonate transparencies (does not craze)
- Applications: windshield, canopy and window sealing; exterior mold line
- Compliance: Boeing MAT-587 qualified (Class B-1/2, B-2) per distributor listing
Frequently asked
What are the key specifications?
Chemistry: two-part, manganese dioxide-cured polysulfide, solvent-free; Color: black; Form: non-sag thixotropic paste; injection gun or spatula; Application life classes: B-1/2, B-1, B-2 (~0.5 / 1 / 2 h); Cure: ~4 h / 7 h / 9 h respectively; Substrates: acrylic, glass, polycarbonate transparencies (does not craze); Applications: windshield, canopy and window sealing; exterior mold line.
How do I get pricing and lead time?
Angad Aviation supplies this 3M product quote-first — request a quote and our team responds with current price, pack sizes, availability and lead time. Every order ships with full traceability and documentation.
From other manufacturers
Other manufacturers we source in Sealants. Not a statement of interchangeability — send us your part number and we will confirm what fits.
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