BOSTIK P100 Primary Sealant

TYPICAL APPLICATION WHEN USING WITH BOSTIK 5000 OR BOSTIK 6000 HMB SECONDARY SEAL

Bostik P100 Primary Sealant is suitable for use on all types of primary seal application equipment. Due to inherent minor differences between machinery, optimum performance is best attained by assessing the coating weight per linear metre on each side of the spacer bar rather than by specific temperature and pressure settings. The coating weight should be between 1.5 g and 2.5 g per linear metre on each side with the front and back coating weight as close to each other as possible (no greater than 0.3 g difference).

The spacer bar profile also determines the optimum coating weight achievable. A straight-sided spacer bar will require a lower coating weight than a spacer bar specifically designed for dual seal systems (see diagram). This type of spacer can accommodate a higher coating weight.

If the coating weight is at the higher end of the range then not only could an excess of primary seal exude into the unit cavity, but also the degree of pressing out could be adversely affected leading to inadequate adhesion and/or excessive unit thickness. It is important that a continuous, even coating is achieved and that any excess primary seal is pushed into the gap where the corner key locates into the spacer. A complete primary seal of the unit is only attained when corner keys are plugged or a bent spacer bar system used. Avoid touching the extruded primary seal as this may adversely affect the wetting out and adhesion of the compressed primary seal. Further advice on particular aspects of application and the use of Bostik P100 Primary Sealant with Bostik hot melts can be obtained from our Technical Service Department

• Excellent adhesion to glass, aluminum, galvanized steel, stainless steel & tinplate spacer bar and metal and plastic corner keys
• Very low gas permeability
• Acts as a thermal break
• Easy application with standard dispensing equipment
• No cleaning or purging of dispensing equipment required
• Can also be used as a handling aid in rigid spacer bar unit production