Protecting skylights from leaks requires selecting a durable, flexible sealant designed for exterior use. This guide reviews five top-rated options and helps you compare key features such as elasticity, UV resistance, and compatibility with common skylight materials. Whether you’re sealing a roof vent, an overhead skylight, or a window opening on an RV, the right sealant can prevent water intrusion and extend the life of your installation.
| Product | Brand |
|---|---|
| SUREBOND BriRus SB140 Skylight Sealant | Surebond |
| ICON 12062 Skylight Rubber Butyl Sealant | ICON |
| SURVOL RV Roof Sealant, Self-Leveling | Survol |
| Dicor 551LSW-1 HAPS-Free NON-Leveling Lap Sealant | Dicor |
| BEEST RV Roof Sealant (Non-Leveling) 2 Pack | BEEST |
Choosing the right skylight sealant depends on installation type (vertical vs. horizontal), substrate compatibility, and climate. The products below cover a range of uses—from self-leveling roof edges to non-leveling lap applications—so you can select a solution that meets your skylight’s mounting style and regional weather patterns.
Surebond BriRus SB140 Skylight Sealant
Product highlights: Flexible butyl rubber sealant designed for skylight sealing, with easy removal when replacement or adjustments are needed. This option is suitable for RV skylights and other exterior skylight installations where a temporary or removable seal is advantageous. Its flexibility helps accommodate movement due to temperature shifts, reducing the risk of cracking or gaps around the skylight flange. For best results, clean the surface, apply in a continuous bead, and allow proper curing according to the manufacturer’s guidelines.
ICON 12062 Skylight Rubber Butyl Sealant
Product highlights: White butyl rubber sealant that self-levels, suitable for ICON external skylight domes. The self-leveling nature helps create a smooth, continuous seal along curved skylight edges, reducing application gaps. It adheres well to typical skylight substrates and remains flexible to accommodate temperature-induced movement. This is a practical choice for ICON skylights or similar external dome installations where a white, low-profile seal is desired.
Sr Specialty Recreation Skylight Sealant SR140
Product highlights: White sealant designed for skylight applications, with packaging details such as dimensions and weight. While data is limited in this listing, SR140 is positioned for recreation and RV skylights, offering a straightforward sealant solution for durable, water-resistant joints. Consider compatibility with your skylight base materials and ensure proper curing as per product specifications.
Dicor 551LSW-1 HAPS-Free NON-Leveling Lap Sealant
Product highlights: A white, non-leveling lap sealant intended for RV roofs and edge work, including vents and skylight screws. Designed for EPDM and compatible roofing materials, it remains flexible, weather-resistant, and user-friendly for vertical or overhead applications. Its non-sag formula helps maintain a consistent bead on vertical surfaces, making it a versatile option for skylight edges in RVs and trailers.
BEEST RV Roof Sealant (Non-Leveling) 2 Pack
Product highlights: A non-leveling, hybrid silicone RV lap sealant designed for vertical surfaces such as walls, windows, and doors, as well as skylight edges. It offers strong adhesion, UV resistance, and quick drying, making it suitable for quick repairs and long-lasting protection on various substrates, including EPDM, TPO, metal, and wood. The product emphasizes versatility for both indoor and outdoor RV sealing applications.
Buying Guide: Choosing the Right Skylight Sealant
When selecting a skylight sealant, consider the type of surface, climate, and installation orientation. Self-leveling formulas are ideal for horizontal roof seams, while non-leveling or lap sealants perform well on vertical faces and edges around skylights. Material compatibility matters; some sealants are designed for EPDM or TPO roofing, while others work across metals and plastics. UV resistance is important for sun-exposed skylights, and elasticity helps accommodate expansion and contraction with temperature changes. For RV applications, choose products rated for mobile environments and compatibility with common RV roofing materials. Always follow manufacturer application instructions for surface prep, cure time, and curing temperature ranges.
Key Purchase Considerations
- Surface compatibility: EPDM, TPO, PVC, metal, and wood
- Application type: self-leveling vs. non-leveling lap sealants
- Flexibility and elongation to handle movement
- UV resistance and weather tolerance
- Cure time and clean-up requirements
- Indoor vs. outdoor use and VOC considerations
Comparative Perspectives
- Durability: Self-leveling formulas often provide smoother, more uniform seals on roof edges, while non-leveling variants excel on vertical surfaces.
- Ease of application: Some products are designed for easy bead control and cleanup, reducing mess and rework.
- Reparability: Removable or easily resealable sealants can be advantageous for skylight maintenance or frequent rooftop access.
- Price vs. performance: Higher-performance sealants may cost more but offer longer service life under harsh weather.