DAP® 100% Silicone Sealant

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Window, Door & Siding Sealant

DAP® 100% Silicone Window, Door & Siding Sealant is an all-purpose, one component, acetoxy cure sealant ideal for indoor/outdoor use.
It provides a watertight, flexible seal that won't crack, crumble or shrink. Once cured, it is unaffected by temperature extremes (-40 °F to 400 °F).
Finish/Color: Almond Clear Transparent White Select Options
Product # Finish/Color
GLU8649 Almond
GLU8641 Clear Transparent
GLU8646 White


- Offers superior quality, long-lasting flexibility and excellent adhesion with a flexible watertight seal

- 50-year durability guarantee
- Superior quality, multi-purpose sealant
- Provides a weatherproof, watertight seal with excellent adhesion
- Resists cracking, crumbling and chalking
- Interior or exterior use


100% RTV Silicone, Acetoxy Silicone
Optimal Adherence to
Fiberglass, Glass, Tile, Non-oiled Wood, Plastic, Rubber, Painted metal
Heavy-Duty, Water Resistant, Weatherproof, Good Cold Flexibility, Low Sag
Skin Formation Over Time/Dry to the Touch
10 to 20 minutes
Tooling Time
5 to 10 minutes
Packaging Specifications
Plastic Cartridge
VOC Concentration (EPA Method 24)
28 grams per liter
Recommended Use
Interior, Exterior, Marine / Recreative Vehicle, Aluminum Windows, Wood Windows, Exterior Trim and Siding, Vinyl/PVC Windows
9.8 oz
Freeze/Thaw Stability



- Ideal for sealing window and door frames, house siding and trim, shutters, vents and marine applications

Optimal adherence:

- Glass
- Ceramic
- Fiberglass
- Porcelain
- Non-oily woods
- Canvas
- Most metals (see For Best Results section)
- Most plastics and rubbers
- Painted surfaces


When tested in accordance with ASTM C719, meets C920 specification for Class 25, Uses G & A* (*Use A does not include Clear)
For Best Results:
- Application temperature is between -35 °F and 140 °F.
- Joint width should not exceed 1/2". If joint depth exceeds 1/2", use backer rod material.
- Not paintable. Paint surfaces before sealing.
- Not recommended for continuous underwater use, below grade use, use on wet surfaces, oily woods, stovepipes or chimneys. Not for fireplace applications, tuck pointing, butt joints, structural glazing or repairing surface defects.
- Not recommended for use on cementitious materials or surfaces that might bleed oils, plasticizers or solvents. Substrates made of methylmethacrylate, polycarbonate, polypropylene, polyethylene and polytetrafluoroethylene do not allow for best adhesion and compatibility with sealant. Try test area before using.
- Not recommended for use on brass, copper, magnesium, zinc, iron, galvanized metals or other surfaces prone to attack by weak acids.
- Do not use where abrasion and physical abuse are encountered.
- Store in temperatures below 90 °F in a dry place.