Butyl-Nek flexible sealing compound provides a permanent watertight joint for pre-cast concrete units regardless of shape or size. This easily compressible product is designed to completely seal and fill the annular space between pre-cast units. Butyl-Nek associated products have a 50 year proven track record in the most extreme situations specified and is used by pre-casters and contractors worldwide.

Butyl-Nek meets and exceeds the requirements of the federal specifications:
SS-S-210 (210A0, AASHTO M-198B, and ASTM C-990-91)

Compliance

Butyl-Nek meets the requirements of the following authorities:

Civil Engineering Specification for the Water Industry. 5th edition, WRc, 1998 DOT Specification for Highway Works, HMSO, 1998 BS EN 1917 (supersedes BS8005) sewerage BS8301 (Building Drainage), 1985

Butyl-Nek with watertight performance

1996 Hydrostatic pressure test complies with BS EN 1917 clause 4.3.4.2 watertightness of assembled units. The assembly showed no leakage.

Butyl-Nek Primer

Butyl-Nek Emulsion Primer is a thin penetrating solution of premium, mineral colloid asphalt emulsion. The primer readily penetrates the pores and seals dusty concrete surfaces for the adhesion and bonding of Butyl-Nek flexible sealing compound for pre-cast concrete products. Butyl-Nek Emulsion Primer is odourless, environmentally safe and non flammable in the wet state. Primer may be applied by brush or spray. Butyl-nek Emulsion Primer may be applied on damp or “green” concrete surfaces.

Solvent Primer is available for conditions where Emulsion Primer cannot be applied.

Both Emulsion and Solvent Primers are available in 5 and 25 litre containers.

Instructions for use

Application

Wire brush all loose dirt and particles from the joint surface to be primed. Joint surfaces should be free from dirt, dust, form oils, release agents and curing compounds. Brush or spray apply Butyl-Nek Emulsion Primer around entire joint circumference and allow to dry thoroughly. Butyl-Nek Emulsion Primer may be applied at the pre-cast manufacturing plant or on site.

BUTYL-NEK WILL NOT ADHERE TO WET PRIMER.

Drying Time:

Butyl-Nek Emulsion Primer dries in approximately 1 to 3 hours, in good weather conditions. Drying may take up to 24 hours depending on thickness, temperature and condition of surface. Protect from rain or frost until fully dried.

Vertical Application:

Applying primer is recommended but not necessary. If applied ensue primer is completely dry.
Unroll Butyl-Nek coil whilst pressing firmly to dry, clean joint surface. Leave plastic film in place to protect Butyl-Nek from contaminates until ready to join units. Form a continuous joint, attach Butyl-Nek end to end. Do not stretch Butyl-Nek. Remove plastic film from Butyl-Nek and align next unit. Each unit s homed by it’s own weight, compressing Butyl-Nek to tightly pack and immediately seal the joint. After the last section is set and fully homed the installation is complete. Backfilling and compaction can commence immediately.

Horizontal Application

Applying primer is recommended. Ensure that unit jointing can be accomplished without getting mud, slit, gravel or other foreign material into the joint. Generally the trench should be de-watered and have a firm base.

Unroll Butyl-Nek coil whilst pressing firmly to dry, clean joint surface. Leave plastic film in place to protect Butyl-Nek from contaminates until ready to join units. Form a continuous joint, attach Butyl-Nek end to end. Do not stretch Butyl-Nek. Remove plastic film from Butyl-Nek and align next unit. The unit should be partially supported to maintain concentricity until the Butyl -Nek is fully compressed within the annular joint space.

Backfilling and compaction can begin immediately after jointing is complete.

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