Vacuum vs Displacement

[sgailey]

A few months ago I read the ROLAGS manual for the first time, and there was one point in section 8.1 (Process to be Followed by Technician) that I'd like to hear your feedback on:

(1) Inspect the damage from both inside and outside the glass to determine if
the damage is repairable (see clauses 6 and 7);
(2) Remove moisture, dirt, foreign matter, loose glass, and contamination from
the damaged area;
(3) If the temperature of the glass is outside the recommended range, cool or
warm the glass accordingly;
(4) Access the damage through probing or drilling;
(5) Protect the resin from premature curing;

(6) Remove the air from the break, either by vacuum or displacement, and fill the void with resin;

(7) Properly perform pit filling and resin curing;
(8) Finish the repair to be flush with the glass;
(9) Inspect the finished repair (see clause 9).

I currently use DeltaKits repair bridges, which I would assume, utilize the displacement method of air removal (combined with a vacuum cycle following the displacement, or pressure cycle).

Have any of you weighed this against systems using a pre-injection vacuum cycle, such as Glasweld's Gfusion?

Is there a notable comparison between these two air-removal methods?

Benefits or downsides to either?

Thanks!

[Brent Deines]

Obviously I am biased, but I would strongly encourage you to attend an industry trade show where several manufacturers demonstrate their equipment. We all say we're the best, but seeing is believing. How about this weekend in Vegas? The NWRA & IGA are having conventions in conjunctions with the NACE show. The SEMA show is also going on across town, so there is a lot going on. Anyway, back to the subject at hand. Comparing the various systems side by side with the manufacturers there to show you their methods is the best way I know of to evaluate equipment and techniques. I recommend it to anyone interested in separating fact from fiction.

[sgailey]

Thanks for the reply, Brent.

Biased or not--- I'll take the information you've got!

My weekends are slammed right now--- or else I'd love to head down there.