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Stanley S421 RTV Silicone Caulk Brown (1 x 10.1 fl.oz.) - 100% Waterproof Industrial-Grade Silicone for Kitchen, Bathroom, Shower, Window, Door, Indoor & Outdoor Use
✅ In stock
F
Grade
Analysis Confidence
73%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Sep 23, 2026 3:06 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- 💰The current price is slightly above the going rate for this product — worth watching for a drop.
- 🏷️A 17% cut from the official retail price adds further appeal.
- 📉Better-priced windows have occurred before, though not frequently — today's price is reasonably competitive.
- 📈Prices have been moving higher lately — waiting risks paying more if that momentum continues.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
0/20
Deal Strength
0/20
Momentum
0/10
📝 Product Overview
🏪 Sold by
Stanley Chemicals
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓100% Silicone Sealant for Long-Lasting Sealing: Formulated with pure silicone for exceptional elasticity and durability. Ideal for sealing joints and gaps on windows, doors, kitchens, bathrooms, and more.
✓WATERPROOF BATHROOM & KITCHEN CAULK: Create a secure seal around showers, bathtubs, sinks, countertops and other moisture-prone areas. This waterproof silicone sealant works as bathroom caulk, shower caulk and bathtub caulk, helping prevent water from entering joints and gaps exposed to splashes, humidity and frequent cleaning.
✓FLEXIBLE SEAL THAT MOVES WITH THE JOINT: Unlike rigid fillers, the cured silicone caulk maintains elasticity as joints expand, contract or experience normal movement. Its flexible finish helps reduce cracking, shrinking and separation over time, making this RTV silicone sealant a reliable choice for areas affected by temperature and environmental changes.
✓MULTI-SURFACE ADHESION FOR CLEAN RESULTS: Designed to bond effectively to glass, ceramic, porcelain, enamel, aluminum, stainless steel and coated wood. This all-purpose silicone sealant supports clean, professional-looking caulking around fixtures, frames and connecting surfaces when applied to properly prepared, dry and contaminant-free areas.
✓INDOOR & OUTDOOR SEALING APPLICATIONS: Use this weather-resistant silicone sealant around windows, doors, kitchens, bathrooms and exposed non-porous joints. Suitable for residential, commercial and general construction use, it provides a durable barrier against water, humidity and changing weather while retaining long-term flexibility.
⚙️ Specifications
Color
Brown
Brand
STANLEY
Number of Items
1
Manufacturer
StanleyChem
UPC
810125463860
Unit Count
1 Count
Material
Silicone
Product Dimensions
2 x 2 x 10 inches
Item Weight
1 pounds
ASIN
B0GCHYQKD3
Date First Available
December 25, 2025
