Trex RainEscape® Butyl Caulk

Seal and Protect Your Under-Deck Drainage System

Trex RainEscape® Butyl Caulk is a vital finishing component of the Trex RainEscape Under-Deck Drainage System. Designed to seal around downspouts, trough overlaps, and edge details, this high-performance caulk ensures a watertight bond that prevents leaks and protects the area beneath your elevated deck from moisture infiltration.

Product Features:

• Watertight Sealing Power – Fills gaps and seals joints to keep water from penetrating the drainage system

• Flexible and Durable – Remains pliable to accommodate temperature changes and deck movement

• Superior Adhesion – Bonds securely to HDPE materials used in the Trex RainEscape system

• UV and Weather Resistant – Formulated to withstand exposure to sun, rain, and fluctuating conditions

• Professional-Grade Performance – Provides long-lasting protection with minimal maintenance

Specifications:

• Volume: 10.5 oz tube

• Color: Black

• Material Type: Butyl-based elastomeric sealant

• Cure Time: Skins over in 10–15 minutes; full cure in 24–48 hours

• Application Surface: Troughs, downspouts, joists, and seam overlaps

• Compatibility: Works with all Trex RainEscape components and materials

Installation Tips:

• Use on dry, clean surfaces for best adhesion

• Apply to all trough overlaps, around downspouts, and at seams or penetrations

• Smooth with a gloved finger or caulking tool for a clean, professional finish

• Store at room temperature prior to use for easier application

Complete your system by pairing Trex RainEscape Butyl Caulk with troughs, downspouts, butyl tape, and post flashing to ensure total under-deck moisture protection.