













🖤 Seal your adventure in style with Dicor’s sleek, weatherproof finish!
Dicor 351CSB-1 HAPS-Free Cap Sealant is a premium black, paintable sealant designed for RV window, door, and joint maintenance. Its fast-drying, non-sag formula offers superior crack resistance and weatherproof protection across multiple surfaces including metal, wood, glass, and fiberglass. Ideal for professionals and enthusiasts seeking a durable, easy-to-apply sealant that maintains a polished, seamless look under harsh conditions.

| ASIN | B081DQ5D34 |
| Best Sellers Rank | #4,560 in Automotive ( See Top 100 in Automotive ) #6 in RV Sealants |
| Brand | Dicor |
| Color | Black |
| Date First Available | November 12, 2019 |
| Item Form | Liquid |
| Item Weight | 12 ounces |
| Item dimensions L x W x H | 11.5 x 2 x 2 inches |
| Item model number | 351CSB-1 |
| Manufacturer | Dicor |
| Material | Plastic |
| Number of Items | 1 |
| Product Dimensions | 11.5 x 2 x 2 inches |
| Style | Black Cap Sealant |
| Surface Recommendation | Window |
| UPC | 677917010967 |
| Unit Count | 10.3 Fluid Ounces |
| Water Resistance Level | Water Resistant |
L**E
Excellent RV Sealant – Crack Resistant, Smooth Finish & Great Value!
The Dicor 351CSCL-1 HAPS-Free Cap Sealant is perfect for RV window and door maintenance! The clear formula gives a clean, professional look, and it levels beautifully for a smooth finish. It offers outstanding sealability, crack resistance, and long-lasting durability—even in harsh weather. Easy to apply and dries evenly without mess. Great quality and value for money—a must-have for RV owners who want reliable waterproofing and a polished appearance. Highly recommend—I’ll buy again!
B**Y
Works great
Works as intended, easy to spread evenly. Does not run.
K**R
Keep your trailer watertight
I bought the Dicor brand, because it was the most recommended on the internet and when my local RV dealer wanted hundreds of dollars to reseal my trailer, this was the brand they were going to use. Instead, I bought it off Amazon for half the price they wanted for a tube at the shop, and did it myself. The sealant goes on very smooth and even. It’s clear, so it dries with a shine, but it’s not too noticeable. It is very gooey, so I brought a few rags and some water to clean and run off, as it can get pretty messy if you’re not careful. I have. 22’ trailer and it took me 2 tubes to seal around the windows, door, and base of the rv. The tube goes a long way, but I was very liberal applying it. Keeping the rv watertight is the most important thing you can do to preserve your trailer, so it’s well worth the cost and I wouldn’t skimp on a lesser brand.
D**.
Good sealant
Used on camper and seems to be good quality and working
R**R
Great stuff
Great stuff but tape off your work and wear gloves!
A**R
Works as intended and easy to apply.
Works as intended. Easy to apply. Fix my issues.
E**C
Really good stuff!
This stuff is solid! I bought an older camper that needed some work and this stuff has helped me seal up all kinds of problems I have come across. I plan to keep a spare in my camper whenever I travel!
K**R
Works as expected
Adheres to cleaned surfaces and provides a good seal. I plan to keep one in the camper in case of future issues. I will purchase again.
J**T
V Good products
D**R
Très bon produit
J**K
très bien
M**E
This was perfect for our fifth wheel. Very good sealer
D**N
Good product and quick delivery
Trustpilot
2 weeks ago
2 weeks ago