20H System - Below-Grade Wall Expansion Joint

The 20H System is a tried and true preformed expanding foam sealant produced by impregnating permanently elastic, high density, open-cell polyurethane foam with an acrylic polymermodified, water-based asphalt emulsion. It is primarily used in below-grade applications. The architectural and engineering community has benefited from 20H System’s performance for over 30 years.

Note: The 20H System has been replaced for deck joint applications by the DSM System and in below-grade applications by BG System and DSM-DS. 20H System still exists in legacy specifications and for installations in below-grade, positive-side wall joints.

Features

• Warranted for watertightness
• Primary seal for exterior vertical below-grade walls in installation from positive side
• Non-invasive anchoring
• Conforms to gap irregularities
• Size switching accommodates joint gap variations
• Thermally insulating

Uses

• Concrete foundations
• Retaining walls
• Below-grade expansion gaps

Sizes

Nominal Sizes: 1/2″ (12mm) to 4″ (100mm)

Movement

Up to 50% Total (+25% and -25% of nominal supplied size.)

Color

Black