Red Devil StormGuard 920 100% RTV Silicone Window and Door Sealant

In this review of the Red Devil StormGuard 920 100% RTV silicone sealant, the bottom line is straightforward: it is a dependable, weather-resistant option for homeowners and contractors who need a flexible, long-lasting seal around windows, doors and other exterior joints. The reviewer found the product especially useful where UV, temperature swings and moisture exposure are a concern, because the one-part, neutral cure formula promises superior flexibility and a watertight bond. For projects requiring a clear, low-odor sealant that adheres to many substrates, this 12-pack is a practical choice.

Key Features

• Weather-resistant seal: Formulated as a one-part, neutral cure 100% RTV silicone to resist rain, sun and temperature cycling on exterior window and door applications.
• Broad adhesion: Bonds to metals, glass, painted and unpainted wood, brick, plaster and many plastics, reducing the need for multiple specialty sealants.
• Long-lasting flexibility: The improved formula will not crack, shrink or peel, helping maintain a durable seal through joint movement and seasonal stress.
• Low odor and VOC compliant: A low odor, USDA recognized formulation makes it suitable for enclosed areas such as bathrooms and other indoor spaces.
• High durability: Designed to withstand extreme heat, cold and UV exposure so the seal retains integrity over time on skylights, trim, gutters and vents.
• Made in USA: Domestic manufacture means consistent production quality and availability for contractors who buy in bulk.

Who It's For

This sealant is aimed at homeowners, property maintenance teams and contractors who need a versatile, clear sealant for exterior and interior joints where moisture resistance and UV stability matter. It works well for sealing windows, doors, skylights, gutters and trim where a waterproof, flexible joint is required.

Those who need specialized chemical resistance, structural adhesives for load bearing joints, or a sealant colored to match specific trim may want to consider a different product; this is primarily a multi-purpose silicone for sealing gaps and joints rather than a structural bonding solution.

Pros & Cons

Pros

• Excellent weather resistance and UV stability for exterior seals.
• Adheres to a wide range of substrates, reducing the need for multiple products.
• Maintains flexibility and resists cracking, peeling or shrinking over time.
• Low odor and VOC compliant, usable in enclosed areas like bathrooms.

Cons

• Some customers reported mixed results with adhesion on certain surfaces, so surface preparation is critical.
• Clear finish may show dirt or discoloration over very long outdoor exposure compared with colored sealants.

Specifications

Brand	Red Devil
Type	100% RTV silicone sealant
Container	2.8 oz. tube
Pack	12-pack
Color	Clear
Use	Interior and exterior window and door applications
Country	Made in the USA

Our Verdict

The Red Devil StormGuard 920 is a strong value for anyone needing a reliable, flexible silicone sealant for windows, doors and similar joints. It delivers durable, watertight performance across many surfaces and the low odor, VOC compliant formula is a practical plus for indoor use. With proper surface preparation it is a sensible choice for both DIY and professional projects where long-term weather resistance matters.

Frequently Asked Questions

Is this sealant suitable for outdoor use?
Yes. The 100% RTV silicone is formulated for weather resistance, UV exposure and temperature swings, making it suitable for exterior windows, trim, gutters and vents.

Will it stick to painted surfaces and plastics?
Yes. The product is designed to adhere to painted and unpainted wood, metals, glass, brick, plaster and many plastics and vinyl, though surface cleaning improves adhesion.

Does it have a strong odor?
No. The formula is low odor and VOC compliant, which makes it appropriate for use in enclosed spaces like bathrooms.