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3M AC-251 B-2 3.5 OZ - CANOPY / WINDSHIELD SEALANT

$29.80/Each
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Part# 09-04008
MFR Model# 70005201846

Overview

AC-251 Black Class B are two-part, quick curing, polysulfide based canopy and windshield sealants. These products are formulated for sealing acrylic, glass, and polycarbonate aircraft canopies and windshields. AC-251 Black Class B Sealants contain no solvent and do not craze. The sealants quickly cure and exhibit excellent adhesion and resistance to UV and weather exposure.

3.5oz Fill Premixed Syringe

Features

  • AC-251 Black Class B Sealants have a thixotropic, non-sag consistency
  • They can be readily applied with a spatula or extrusion gun on vertical surfaces

Specifications

  • MAT-587 Qualified (B-1/2,B-2)

Documents

Reviews

Worthless on a Cessna. Cleaned and prepped IAW directions and had the entire top windshield strip come off and start beating the aircraft right on takeoff. Wont stick to lexan or aluminum. Save your money and use conventional windshield silicone.

R H
February 9, 2020

Q&A

Q: Regarding 3M AC-251 B-2 Canopy / Windshield Sealant: Is this product is considered hazardous for shipping? Do you need to use primers on surfaces before?

The material is not considered haz-mat. The surface must be clean and free of any contamination. Primer is not required.

Q: What is the working time of the 3M AC-251 B-2 3.5 OZ - CANOPY / WINDSHIELD SEALANT?

Per the tech data sheet in the Documents tab show the B-2 has a 2 hour working time. Please review the TDS for more details on this product.

Q: How many tubes would be needed to do a windshield?

That is tough to answer because the size of windshields would vary aircraft to aircraft. Most customers buy 2-3 when installing windows.

Q: It looks like once the catalyst is injected into the body of the sealant, included is a tip for application. Do you use a standard caulk gun to apply it?

They would require a special extrusion gun to apply or you can use the included application tip. The gun part number would be 09-38520 for example.

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