if i use part of the tube of dicor, how do i keep the tip from hardening so i can reuse it

YES the Dicor tip has to be sealed. YOU NEED TO KEEP AIR OUT, what I use is a screw that will fit snug in to the tip hole, then make a aluminum foil cone over that. A small wooden dowel that fits in to the tip hole. Anything that will keep air out

Why does the Amazon photo say it is "self-leveling" but under "Usage" say it is non-leveling? Are products sent labeled the same way?

No. There may be an error in the Amazon foto. There are two DIFFERENT Dicor products. Each is labeled self labeling or non leveling on the tube. Self leveling is used for lateral sealing ie. on your roof. Non- leveling is used for verticle sealing ie. where the sides of your RV meet the end cap. I've used it for years and it does a good job.

Will it adhere to the rubber roof material?

Yes it will and works perfect for the project. Mine is a rubber roof...

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501LSW-1 Epdm Self-Leveling Lap Sealant-10.3 Oz. Tube, White, 10.3 Fluid_Ounces (Packaging May Vary)

Product ID: 4286003

Details

Brand
Dicor
Item Weight
12.8 Ounces
Item dimensions L x W x H
11.25 x 2 x 2
Material
Rubber
Style
Self-Leveling

🧱Adheres to 7+ surfaces

🌧️100% waterproof seal

🛠️10.3 oz precision tube

¥3523

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Seal smart, stay dry, and lead the pack!

UV STABLE WHITE FINISH - Maintains pristine color without staining or discoloration, ensuring a clean, professional look.
FLAWLESS WATERTIGHT DEFENSE - Creates a secure, secondary seal around vents, pipes, and screw heads to keep moisture out.
UNIVERSAL SURFACE COMPATIBILITY - Bonds seamlessly with aluminum, wood, vinyl, concrete, fiberglass, and galvanized metal for versatile use.
FLEXIBLE SELF LEVELING FORMULA - Adapts to surface contours and remains flexible to prevent cracks and leaks over time.
TRUSTED BY PROS RV ENTHUSIASTS - Ranked #1 in RV sealants with 4.7-star rating from over 23,000 users—join the elite who never compromise.

Dicor HAPS-Free Self Leveling Sealant in white delivers a durable, waterproof secondary seal compatible with EPDM and TPO roofing materials. Its flexible, UV-stabilized formula adheres to a wide range of surfaces including aluminum, wood, vinyl, and concrete, ensuring long-lasting protection against leaks. Packaged in a convenient 10.3 oz tube, it’s the top-rated choice for RV owners and professionals seeking reliable, clean, and flexible sealing solutions.

Specifications

ASIN	B000BRF7QE
Best Sellers Rank	#140 in Automotive ( See Top 100 in Automotive ) #1 in RV Sealants
Brand Name	Dicor
Color	White
Compatible Material	Aluminum, Concrete, Fiberglass, Metal, Vinyl
Customer Reviews	4.7 4.7 out of 5 stars (23,739)
EU Spare Part Availability Duration	5 Years
Global Trade Identification Number	00677917000333
Included Components	Tube
Item Dimensions	11.25 x 2 x 2 inches
Item Form	Liquid
Item Type Name	Dicor 501LSW-1 Lap Sealant - 10.3 oz.
Item Weight	12.8 Ounces
Manufacturer	Dicor
Material Type	Rubber
Model	501LSW-1
Number of Items	1
Part Number	501LSW-1
Style Name	Self-Leveling
Surface Recommendation	Roof,Vent
UPC	677917000319 700115572927 677917000333
Unit Count	1.0 Count
Water Resistance Level	Waterproof

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