Spray on tar sealers offer fast, flexible protection for roofs, gutters, and other surfaces prone to leaks. This guide highlights five top spray sealants ideal for sealing tar, asphalt, and similar substrates, with practical insights on application, durability, and best-use scenarios. Discover options that resist water, humidity, and UV exposure while staying pliable enough to handle temperature changes. Each product below includes key features to help you choose confidently for outdoor repair projects and weatherproofing needs.
| Product | Brand | Type | Best For | Link |
|---|---|---|---|---|
| Gorilla Waterproof Patch & Seal Rubberized Sealant Spray | GORILLA | Rubberized Sealant Spray | Wet or dry leaks, gaps on roofs and flashing | Link included in product section |
| Flex Seal MAX, Clear | Flex Seal | Waterproof Rubber Spray | Gutters, roofs, skylights; seeps into cracks | Link included in product section |
| Leak Stopper Rubber Flexx | Leak Stopper | Rubber sealant spray | Cracks, holes, and leaks on diverse surfaces | Link included in product section |
| Gorilla Waterproof Patch & Seal Rubberized Sealant Spray (Black) | GORILLA | Rubberized Sealant Spray | Tar, shingles, and metal surfaces; durable coating | Link included in product section |
| Flex Seal MAX, Black | Flex Seal | Waterproof Rubber Spray | Outdoor repairs; black coating blends with dark substrates | Link included in product section |
The following sections spotlight five highly relevant spray-on tar sealers. Each product section provides a concise overview, practical uses, and notable features to compare options side-by-side for durable waterproofing and leak prevention in American homes and outbuildings.
Gorilla Waterproof Patch & Seal In Crystal Clear
Gorilla’s Crystal Clear spray silicone Rubberized Sealant forms a flexible, self-leveling coating designed to seal out water, air, and moisture. Its controlled spray pattern ensures an even coat for small gaps and cracks, creating a watertight seal on roofs, gutters, and flashing. The dried coating is temperature and UV resistant, contributing to durable, long-lasting repairs. This option is suitable when a clear finish is desired for aesthetic preservation on visible surfaces.
Flex Seal MAX Clear 17 Oz
Flex Seal MAX provides a fast, spray-on solution that dries to a flexible, rubberized coating. It seeps into cracks and holes to form a watertight layer and remains pliable over time, which helps it endure temperature shifts. It can be painted any color after drying, making it versatile for roofs, gutters, and outdoor projects where a durable seal is needed without a heavy texture.
Leak Stopper Rubber Flexx – 18 Oz Black
Leak Stopper’s Rubber Flexx is designed to seal leaks across diverse surfaces, including shingles, metal roofs, chimneys, and skylights. The product dries to a white patch that becomes a watertight, flexible, rubberized coating. It’s formulated to withstand a range of temperatures and can be applied on wet or dry surfaces, making it suitable for emergency repairs and ongoing protection of tar-based substrates.
Gorilla Waterproof Patch & Seal Rubberized Sealant Spray – Black
This Black variant from Gorilla provides a durable rubberized coating to seal out water, air, and moisture while offering self-leveling properties for smooth coverage. The spray pattern supports controlled application to small gaps and cracks. It remains temperature and UV resistant after drying, making it a strong option for tar-based repairs and dark-colored surfaces where visibility matters.
Flex Seal MAX Black 17 Oz
Flex Seal MAX in black delivers a rapid, waterproof coating that dries into a flexible rubberized sealant. It’s designed to seal cracks and holes and can be painted over once dry. The black finish helps blend with dark substrates, and the coating remains pliable for long-term durability, suitable for outdoor repairs like roofs, gutters, and vent areas where tar or bituminous materials are present.
Buying Guide: Key Considerations For Spray On Tar Sealers
Surface compatibility
Choose a product formulated for roofs, tar, asphalt, or bitumen surfaces if that is your primary material. Some sealants work best on dry surfaces, while others tolerate dampness. Consider the substrate type (metal, shingles, wood) and environmental exposure (UV, temperature swings) when selecting a sealant.
Durability and flexibility
Look for a rubberized, flexible coating that remains pliable after curing. This helps the seal withstand expansion, contraction, and weather-induced movement without cracking. UV resistance extends the life of exterior repairs in sunny climates.
Color and finish
Clear formulas are useful when aesthetics matter or when applying over visible substrates. Dark or black variants can blend with tar or dark roofing materials. Paintability after curing offers another path for color matching.
Application and coverage
Assess spray pattern, cure time, and required surface prep. Some products cure quickly and require few minutes between coats, while others offer longer working times. Consider whether you need large-area coverage vs. targeted sealing of cracks and joints.
Temperature tolerance and weather readiness
Outdoor sealants should tolerate a range of temperatures and resist moisture during curing. Temperature and UV resistance extend the lifespan of repairs, especially on roofs and outdoor structures exposed to sun and rain.
Safety and ease of use
Review ventilation requirements, surface safety, and the presence of any solvents or fumes. Ease of use—such as a controllable spray nozzle and self-leveling properties—helps achieve consistent results for DIY projects.
When selecting a spray-on tar sealer, balance these factors with the specific repair scenario: roof seams, gutters, tar patches, or flashing. For visible surfaces, consider clear or color-matched finishes. For complex leaks, a combination approach (cleaning, prepping, and applying multiple coats) may yield the best long-term protection.