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RPI Royal Edge Lap Caulk 10.3 oz Seam Sealant for EPDM Roofing
Regular price $18.25Orders start at $399 — combine any items to reach the minimum. Learn more
RPI Royal Edge Lap Caulk 10.3 oz Seam Sealant for EPDM Roofing
RPI Lap Caulk is a weather-resistant, one-part lap sealant for single-ply roofing seam edges. Supplied in a 10.3 oz cartridge and available in Black or White, it protects and seals seam edges and is also used with pipe boots, termination bars and other RPI-specified applications. Pair it with RPI splice adhesive as part of the RPI system.
Key Features:
- One-Part Formula: Single-component sealant requires no mixing before application.
- Weather Resistant: Formulated to withstand outdoor exposure on roof seams and terminations.
- Seam Edge Protection: When properly applied, it protects and seals the seam edge of single-ply laps.
- Multiple Uses: Also used as a sealant with pipe boots, termination bars and other applications required by RPI specifications.
- System Matched: Designed to be used with RPI splice adhesive.
- Two Colors: Available in Black or White 10.3 oz cartridges to match the membrane.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | RPI |
| Sell unit | 1 cartridge, 10.3 oz |
| Product line | RPI Lap Caulk (Royal Edge Lap Sealant) |
| Available colors | Black, White |
| Available sizes | 10.3 oz cartridge |
| Material | One-part weather-resistant sealant |
| Dimensions | 10.3 oz cartridge |
| Coverage per unit | Varies with bead size and application |
| Intended use | Sealing single-ply seam edges, pipe boots, termination bars and RPI-specified applications |
| Assembly | No mixing required; apply as directed by RPI specifications |
Coverage & How Much You Need:
Coverage depends on bead size and the length of seam or detail being sealed; one 10.3 oz cartridge is sized for typical lap-edge and detail sealing applications.
Fit and Compatibility:
Designed for use within RPI single-ply roofing systems together with RPI splice adhesive, pipe boots, termination bars and related RPI components. Apply in accordance with RPI specifications.
Frequently Asked Questions (FAQ):
Q: What is included in one order?
A: One 10.3 oz cartridge of RPI Lap Caulk in either Black or White.
Q: Where is this sealant used?
A: It seals single-ply seam edges and is also applied at pipe boots, termination bars and other locations required by RPI specifications.
Q: Does it need mixing?
A: No, it is a one-part sealant ready to apply from the cartridge.
Q: Should I use it with other products?
A: Yes, it is designed to be used with RPI splice adhesive as part of the RPI system.
Q: Which color should I choose?
A: Black and White are both offered, so you can match the sealant to the membrane color at the seam or detail.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Lap caulk is the final line of defense at the exposed edge of a spliced single-ply lap, so keep the edge clean and dry before tooling a continuous bead. Use it at every RPI-specified detail, including pipe boot bases and termination bars, and select the color that matches the membrane. Stock both Black and White so crews are not forced to substitute on a mixed-color roof.
Follow the sealant safety data sheet for ventilation and skin protection when applying, and confirm the substrate is dry before sealing seams.
Order RPI Lap Caulk in Black or White to finish your single-ply seams and details.
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