---
product_id: 18031091
title: "Dicor 501LST-1 HAPS-Free Self-Leveling Lap Sealant for Horizontal Surfaces - 10.3 Oz, Tan, Secure, Ideal for RV Roofing, Maintenance, Repair, Appliance Application"
brand: "dicor"
price: "$29.80"
currency: USD
in_stock: true
reviews_count: 13
url: https://www.desertcart.us/products/18031091-dicor-501lst-1-haps-free-self-leveling-lap-sealant-horizontal
store_origin: US
region: United States of America
---

# Adheres to 7+ roofing & building materials Sun-ray stabilized for UV resistance Self-leveling for smooth, professional finish Dicor 501LST-1 HAPS-Free Self-Leveling Lap Sealant for Horizontal Surfaces - 10.3 Oz, Tan, Secure, Ideal for RV Roofing, Maintenance, Repair, Appliance Application

**Brand:** dicor
**Price:** $29.80
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal smart, seal stylish — protect your RV like a pro!

## Quick Answers

- **What is this?** Dicor 501LST-1 HAPS-Free Self-Leveling Lap Sealant for Horizontal Surfaces - 10.3 Oz, Tan, Secure, Ideal for RV Roofing, Maintenance, Repair, Appliance Application by dicor
- **How much does it cost?** $29.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/18031091-dicor-501lst-1-haps-free-self-leveling-lap-sealant-horizontal)

## Best For

- dicor enthusiasts

## Why This Product

- Trusted dicor brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted by Pros:** Top-rated (#1 in RV Sealants) with 23,000+ glowing reviews—join thousands who refuse to settle for less.
- • **UV-Proof Durability:** Sun-ray stabilized formula blocks wear and discoloration, keeping your RV roof looking flawless season after season.
- • **Invisible Protection:** Tan hue blends perfectly with your RV roof, providing a stylish, stain-free finish that won’t discolor materials.
- • **Effortless Application:** Self-leveling consistency ensures a smooth, bubble-free seal on horizontal surfaces—no expert skills needed.
- • **Universal Compatibility:** Seamlessly bonds with EPDM, TPO, PVC membranes plus aluminum, wood, vinyl, fiberglass, concrete, and more.

## Overview

Dicor HAPS-Free Self Leveling Sealant in tan is a premium, sun-ray stabilized lap sealant designed for RV roofing. It offers superior adhesion to a wide range of materials including EPDM, TPO, PVC, aluminum, and concrete. Its self-leveling formula ensures a smooth, professional finish that resists wear, discoloration, and staining, making it the #1 choice among RV owners and professionals for durable, waterproof roof protection.

## Description

Dicor’s Self-Leveling Lap Sealant creates a watertight seal along a roof's edges, air vents, vent pipes, and screw heads. This lap sealant is a versatile sealant formulated for EPDM roofing but also compatible with most other roofing material, including Dicor DiFlex II, Tufflex PVC, and BriTEK TPO roofing. It offers excellent adhesion to aluminum, mortar, wood, vinyl, galvanized metal and concrete. Continuously seals and remains flexible. Color matched, our lap sealants are sun-ray stabilized to resist discoloration and wear and will not stain or discolor any material to which it is applied. HAPS-free.

Review: Works well on trailer roofs - This is a good product. We have a lot of client's in a vacation park. Their park model trailers take a beating all winter and then get cooked in the sun all summer. This is the best sealant I've found for tpo and rubber roof that trailers have. It is easy to apply and makes a nice solid patch.
Review: The Only Lap Sealant I Use! - I have tried a couple of other brands of lap sealant, and the results were simply not good. I recently installed an additional solar panel on my RV. I used a cheaper brand to save a few dollars, huge mistake! So, I decided to order Dicor and used it to finish the project and cover the other brand. The Dicor flows smoothly, it adheres great and the leveling is superb. It makes the project looks so much more professional, and I trust that it will do its job to seal and protect from leaks, etc. No more trying other brands, Dicor is the only lap sealant I will use in the future.

## Features

- RV ROOFING USE: Lap sealant is sun-ray stabilized to block wear and discoloration; Plus, it will not stain or discolor any roofing material to which it is applied
- COLOR: Tan hue for stylish and beautiful RV roof
- EASY TO USE: Self-leveling for smooth application to RV roofing on horizontal surfaces
- SIZE: 10.3 oz. tube
- COMPATIBILITY: Works with EPDM, TPO and PVC membranes, it adheres firmly to aluminum, mortar, wood, vinyl, galvanized metal, fiberglass, and concrete

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00HJ6Y05O |
| Best Sellers Rank | #132 in Automotive ( See Top 100 in Automotive ) #1 in RV Sealants |
| Brand | Dicor |
| Brand Name | Dicor |
| Color | Tan |
| Compatible Material | Aluminum, Concrete, Fiberglass, Metal, Vinyl |
| Customer Reviews | 4.7 out of 5 stars 23,666 Reviews |
| Global Trade Identification Number | 00677917008131 |
| Included Components | Dicor 501LST-1 Self-Leveling HAPS-Free Lap Sealant |
| Item Dimensions | 11.5 x 2 x 2 inches |
| Item Form | Liquid |
| Item Type Name | 501LST |
| Item Weight | 10.3 Ounces |
| Item dimensions L x W x H | 11.5 x 2 x 2 inches |
| Manufacturer | Dicor |
| Material | Polyvinyl Chloride |
| Material Type | Polyvinyl Chloride |
| Model | 501LST-1 |
| Number of Items | 1 |
| Part Number | 501LST-1 |
| Style | Self-Leveling |
| Style Name | Self-Leveling |
| Surface Recommendation | Roof,Vent |
| UPC | 677917008131 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Dicor
- **Item Weight:** 10.3 Ounces
- **Item dimensions L x W x H:** 11.5 x 2 x 2 inches
- **Material:** Polyvinyl Chloride
- **Style:** Self-Leveling

## Images

![Dicor 501LST-1 HAPS-Free Self-Leveling Lap Sealant for Horizontal Surfaces - 10.3 Oz, Tan, Secure, Ideal for RV Roofing, Maintenance, Repair, Appliance Application - Image 1](https://m.media-amazon.com/images/I/718B4nqX9CL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well on trailer roofs
*by J***I on April 15, 2026*

This is a good product. We have a lot of client's in a vacation park. Their park model trailers take a beating all winter and then get cooked in the sun all summer. This is the best sealant I've found for tpo and rubber roof that trailers have. It is easy to apply and makes a nice solid patch.

### ⭐⭐⭐⭐⭐ The Only Lap Sealant I Use!
*by D***W on April 22, 2026*

I have tried a couple of other brands of lap sealant, and the results were simply not good. I recently installed an additional solar panel on my RV. I used a cheaper brand to save a few dollars, huge mistake! So, I decided to order Dicor and used it to finish the project and cover the other brand. The Dicor flows smoothly, it adheres great and the leveling is superb. It makes the project looks so much more professional, and I trust that it will do its job to seal and protect from leaks, etc. No more trying other brands, Dicor is the only lap sealant I will use in the future.

### ⭐⭐⭐⭐⭐ Works as it should
*by C***R on June 2, 2026*

Item as described, good quality, works good.

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**Shop now:** [https://www.desertcart.us/products/18031091-dicor-501lst-1-haps-free-self-leveling-lap-sealant-horizontal](https://www.desertcart.us/products/18031091-dicor-501lst-1-haps-free-self-leveling-lap-sealant-horizontal)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-06-23*