Dicor 551LSB Non-Sag Lap Sealant — Black
HAPS-free, UV-stabilized non-sag lap sealant for vertical RV roof surfaces. Compatible with EPDM, TPO, fiberglass, aluminum, and more. 10.3 oz. tube.
? Non-Sag Formula
Holds its shape on vertical surfaces — won’t drip or run after application
☀️ UV Stabilized
Won’t deteriorate, discolor, or stain roofing materials
? HAPS Free
No Hazardous Air Pollutants — cleaner and safer formula
? Wide Compatibility
Works on EPDM, TPO, PVC, fiberglass, aluminum, wood, steel, and more
Features & Benefits
- For vertical surfaces — non-sag paste formula holds its bead shape in place
- Creates a watertight, flexible seal along roof edges, termination rails, air vents, vent pipes, and screw heads
- Ideal for accessories with taller flanges such as TV antennas and skylights
- UV stabilized — resists deterioration and discoloration
- Will not stain or discolor roofing materials
- HAPS-free — meets demanding industry air quality requirements
- Continuously seals and remains flexible
- Paintable after outer skin has formed
- Compatible with EPDM, TPO, PVC, fiberglass, aluminum, wood, steel, vinyl, galvanized metal, mortar, and concrete
- Fits standard caulking guns
⚠️ Vertical Surfaces Only
The 551LSB is a non-sag sealant designed for vertical surfaces. It will not self-level on horizontal surfaces. For roof decks, AC bases, screw heads, and other horizontal applications, use Dicor’s Self-Leveling Lap Sealant (501LS series) instead.
? Installation Instructions
1. Clean surface of all dirt, loose paint, rust, oil, and grease
2. Allow surface to dry completely before applying sealant
3. In cold weather, warm container to room temperature before use
4. Use standard caulking equipment to apply a 1/4″ to 3/8″ bead
Approximate Cure Times (at 50–70°F):
• 5 Minutes — Skins over
• 4 Hours — Waterproof
• 48 Hours — 80% cure
• 30 Days — 100% cure
Product Specifications
| Part Number | 551LSB |
|---|---|
| Brand | Dicor |
| Color | Black |
| Size | 10.3 oz. tube |
| Weight | 0.64 lbs |
| Application Type | Non-Sag (vertical surfaces) |
| Skins Over | ~5 minutes |
| Waterproof | ~4 hours |
| Full Cure | 30 days |
| UV Stabilized | Yes |
| HAPS Free | Yes |
| Paintable | Yes — after skin forms |
| Compatible Roof Types | EPDM, TPO, PVC |
| Compatible Substrates | Fiberglass, aluminum, wood, steel, vinyl, galvanized metal, mortar, concrete |
? Available Colors (551LS Series)
• 551LSB — Black (this listing)
• 551LSD — Dove (Bright White)
• 551LSG — Gray
• 551LST — Tan
• 551LSV — Ivory
• 551LSW — White
? Safety Data Sheet & Support
? Download SDS for Dicor 551LSB (PDF)
Manufacturer: Dicor Products (an Airxcel brand)
dicorproducts.com
