Difference Between Alpha Systems 1021 Self-Leveling Sealant and Dicor
Updated 12/30/2025 | Published 12/28/2025
Question:
What is the difference between AL98KV and Dicor lap sealant? I have always used Dicor in the past but my RV manual says to use the Alpha 1021
asked by: Michael F
Expert Reply:
Hey Michael, welcome back! The Alpha Systems 1021 Self-Leveling Sealant # AL98KV is going to do the same thing as Dicor as long as we're talking about a self-leveling sealant. The main difference is going to be the branding. They both use a butyl rubber base, exact composition may vary (I don't know everything Dicor is made of), but they will both work on your RV.
Since you have a new 2025 Rockwood MiniLite 2205S I would stick with what the manual says just in case you have some kind of weird warranty issue.
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Product Page this Question was Asked From
Alpha Systems 1021 Self-Leveling Sealant for RVs - White - 10.3 oz - Qty 1
- RV Roof Repair
- Sealant
- Self-Leveling Sealant
- Fiberglass Roof
- Metal Roof
- Rubber Roof
- White
- Alpha Systems
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David
12/30/2025
I completely agree, having used both. It seals horizontal surface areas with confidence. :-)