DOWSIL™ 335 Butyl Sealant Black
Application

Suitable for gas-filled triple and double glazed insulating glass units (IGU) using warm-edge spacers and standard spacers manufactured from plastic, metal or combinations of both.

Description

A heat applied polyisobutylene for use as the primary seal in insulating glass in commercial and residential applications. It is suitable for high performance glazing systems, particularly where elevated temperatures are anticipated in warmer climates.

Features and benefits:

  • Meets the requirements according to EN 1279-4.
  • Compatible with all Dow facade silicones.
  • The sealant is suitable as the primary seal in air and gas-filled double and triple insulating glass units and meets the requirements according to EN 1279 in an IG system. As valid for any other technology, a proper application and fabrication of the insulating glass unit is required.
  • Good physical adhesion to glass and a variety of warm edge and standard spacers.
  • Solvent-free and odourless.
  • Compatible with the DOWSIL range of neutral facade silicone materials.
  • Can be applied with common IGU butylizers.

Applications:

Suitable for gas-filled triple and double glazed insulating glass units (IGU) using warm-edge spacers and standard spacers manufactured from plastic, metal or combinations of both.

General information

Uniclass 2015

Pr_30_31_76_33 Glazing compounds and sealantsPrimary

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Specification data - Glazing compounds and sealants

Product Reference

DOWSIL™ 335 Butyl Sealant Black

Standard product features

Colour:

Black.

Technical characteristics:

  • Composition: Polyisobutylene, non-reactive and solvent-free Consistency: Solid compound, non-slump.
  • Application temperature: 125–145°C.
  • Specific gravity (to EN ISO 1183): 1.26 g/mL
  • Corrosiveness: Non-corrosive.
  • Gas permeability (to EN 1279-4: 2018): 0.0117 g/m²·24h (0.00049 g/m²·h).
  • Water vapour permeability 2.0 mm film (to EN 1279-4: 2018): 0.05 g/m²·24h.
  • Volatile content (to EN 1279-4: 2018): ≤0.001%.
  • Melting rate (MVR, meltflow modular to ISO 1133B) for Black: 9–12 cm³/10 minutes.

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