OCM Bentoswell Primer is a trowel-grade sodium bentonite-butyl rubber sealant designed for below-grade concrete waterproofing.

It swells upon contact with water, creating a water-tight seal and serving as a detail accessory for use with other waterproofing products.

Key Features

• Easy to apply with no primer or surface preparation required
• Bonds to most substrate materials, including concrete, masonry, wood, and metal
• Expands upon water contact to ensure a secure water-tight seal
• Ideal for flashing around drains, penetrations, terminations, inside corners, and irregular surfaces

Specifications

• Color: Black
• Weight per Gallon: 10.5 lbs
• Solids Content: 80%
• Sag Resistance: No Sag
• VOC Content: 240 g/L
• Unrestricted Swell: 200%

Application Instructions
Ensure surfaces are clean and dry before application. Apply at temperatures above 25F, and condition the material to a minimum of 40F prior to use. The material should be applied at a minimum thickness of 1/4.

Storage and Shelf Life
Store between 40-110F (4-43C). When stored as recommended, the shelf life is 12 months.