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Boss 400 Colors Siding, Window & Metal Roof Sealant, 300 mL Cartridge
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Boss 400 Colors Siding, Window & Metal Roof Sealant, 300 mL Cartridge
Boss 400 Colors is a VOC-compliant, AAMA rated, one-part neutral-cure sealant made for siding, window and metal roof work. It bonds primerless to vinyl, Kynar 500, wood, aluminum, brick, concrete and fiber cement, and is sold as a 300 mL (or 9.5/10.5 oz) cartridge in 400+ colors. Use it as a perimeter weatherseal for field glazing, window installation, or a primary backbedding compound.
Key Features:
- 400+ color matches: Matches 40+ siding manufacturers' colors and is available in more than 400 colors, including shades like Slate, Almond, Wicker, Black and Clear.
- Primerless adhesion: Adheres without primer to vinyl, Kynar 500, wood, aluminum, brick, concrete and fiber cement.
- 50% joint movement: Provides 50% movement capability and stays permanently flexible without cracking or yellowing.
- Wide tooling range: Easy to gun and tool in temperatures from -35°F to 140°F; heated storage is not required.
- Weather resistant: Neutral-cure formulation cures with moisture and resists cold, rain, ozone, heat and sunlight.
- Reaching nozzle: Comes with a 4-inch nozzle for hard-to-reach areas.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Boss |
| Sell unit | 1 cartridge (tube) |
| Product line | Boss 400 Colors Siding Window & Metal Roof Sealant |
| Available colors | 400+ colors; this page lists 42 variants including 130 Slate, 28 Gray, 20 Almond, 00 White, 52 Black, 157 Clear, 36 Royal Brown, 51 Wicker, 40 Terratone, 31 Linen, 331 Musket Brown and 015 Autumn Red |
| Available sizes | 300 mL, 9.5 oz and 10.5 oz cartridges |
| Material | One-part neutral-curing sealant |
| Type | VOC compliant, AAMA rated |
| Movement capability | 50% |
| Adheres to | Vinyl, Kynar 500, wood, aluminum, brick, concrete, fiber cement |
| Application temperature | -35°F to 140°F |
| Cure | Cures in the presence of moisture |
| Uses | Perimeter weatherseal for field glazing and window installation, primary backbedding compound, siding, windows, metal roofs |
| Nozzle | 4 inch nozzle |
| Storage | Heated storage not required |
Fit and Compatibility:
Color-matched to the 400 Colors line spanning 40+ siding manufacturers' standard shades, so it pairs with vinyl siding, fiber cement, Kynar 500 metal roofing and window installations. Choose the cartridge size and color variant that matches your substrate and siding color.
Frequently Asked Questions (FAQ):
Q: What is included in an order?
A: One cartridge of Boss 400 Colors sealant in the color and size (300 mL, 9.5 oz or 10.5 oz) you select.
Q: Do I need a primer?
A: No. The sealant offers primerless adhesion to vinyl, Kynar 500, wood, aluminum, brick, concrete and fiber cement.
Q: How cold can I apply it?
A: It guns and tools easily in temperatures from -35°F to 140°F, and heated storage is not required.
Q: How do I match my siding color?
A: The line matches 40+ siding manufacturers' colors across 400+ shades; pick the numbered color closest to your siding or metal roof.
Q: Is it flexible over time?
A: Yes. It provides 50% movement, stays permanently flexible, and will not crack or yellow.
Q: What can I use it for?
A: Perimeter weathersealing for field glazing and window installation, backbedding compound, and sealing siding, windows, fiber cement, concrete and brick.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
This is a go-to neutral-cure sealant for siding and metal roof transitions where a paintable, non-corrosive bond matters. Match the numbered color to your siding manufacturer's shade chart to keep sealant lines invisible. Apply a properly sized joint (typically a backer rod for wide gaps) and tool within the -35°F to 140°F window for a clean weatherseal.
Cut cartridge nozzles carefully and avoid skin and eye contact with uncured sealant; use in a ventilated area per the label.
Order Boss 400 Colors Siding, Window & Metal Roof Sealant in your exact siding color today.
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