Bentoswell Expanding Concrete Joint Waterstop

OCM BENTOSWELL is a flexible concrete construction water swelling strip that provides a positive seal by expanding upon contact with moisture.

OCM BENTOSWELL is a special blend of Butyl Rubber Polymers and Bentonite Clay that provides superior expansion characteristics in concrete construction joints. BENTOSWELL is an active Bentonite Water stop that is designed to replace passive PVC dumbbell Water stop in order to eliminate seam welding and split forming required with these types of Water stops.

Bento swell Water stop is available in two different profiles.

BS-1001R is a Rectangle shape measuring 3⁄4” x 1”.

BS-1001T is a Trapezoid shape measuring 1⁄2” at the small end and 1 1⁄4” at the large end. This profile also includes a plastic reinforcing scrim to increase the tensile strength.

Features

• Provides permanently flexible watertight joints
• Quick and easy to install. Does not require skilled labor
• Excellent adhesion to clean dry surfaces
• Sealed joints will not shrink, harden, or oxidize over time
• Effective, Simple, and economical sealing material for cast in place concrete joints.

Limitations

BENTOSWELL is not a self-adhering product, and the use of BENTOSWELL PRIMER is required for proper adhesion to concrete, metal, or PVC surfaces. Do not use mechanical fasteners exclusively to secure BENTOSWELL. But mechanical fasteners can be used in conjunction with BENTOSWELL PRIMER to adhere BENTOSWELL Water stop.

BENTOSWELL requires a 75mm (3”) minimum concrete coverage to the exterior concrete surface.

BENTOSWELL should not be perhydrates by submersion or remain in contact with water prior to the concrete being poured. If ground water is contaminated, or is expected please contact an OCM Inc, representative for compatibility information.

Technical Data
Specific Gravity (ASTM D71)	1.60
Hardness (ASTM D217)	75 dim
Solids Content (ASTM C681)	100%
Unrestricted Swell	300%
Hydrostatic Head Resistant	231ft. (70m)

Applications

• Cast in place applications
• Slabs-on-Grade Foundations
• Storage Tanks
• Pipe Penetrations
• Box Culverts
• Tunnels
• Utility Vaults
• Concrete Vaults
• Burial Vaults Septic Tanks
• Retaining Walls

Installation

1. Brush and remove any loose dirt or particles from the surface.
2. Apply BENTOSWELL PRIMER by brush or trowel on to the clean concrete surface. BENTOSWELL PRIMER is available in 10.3 oz tubes or 1-gallon cans.
3. BENTOSWELL PRIMER should be installed in 1⁄4” minimum thickness.
4. Remove release paper and firmly press the entire length of BENTOSWELL on to the primer surface within 30 minutes of primer application.
5. Tightly Butt Coil ends together to form a continuous waters top. Do not overlap coil ends. Coils can be cut with a knife or utility blade.
6. Now you are ready to pour concrete.

OCM Part #	Description	Box Qty	Weight
BS-1001R	3/4” x 1” x 16’ 8” Ft Rolls (6 Rolls per Carton)	100 LF	51 lbs.
BS-1001T	1/2” x 1 1/4” x 20 Ft Rolls (6 Rolls per Carton)	120 LF	44 lbs.