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Dual Seal Technology
ADCO offers a variety of products for both the primary and secondary edge
sealant components of a dual-seal insulated glass unit. Dual-seal units are
made by joining two lites of glass around their perimeter with a spacer held
in place by two types of sealants. The primary sealant is a polyisobutylene
(PIB) layer applied to the spacer on each edge that contacts the glass. Then
a secondary sealant is applied on the outside of the spacer between the two
lites of glass. The primary sealant provides an excellent MVTR (moisture vapor
transmission rate) while the secondary sealant creates a barrier to environmental
actions against the primary seal to provide the mechanical strength necessary
to hold the unit together.
Sealants available for a dual-seal insulated unit include: Primary: Secondary: ADCO’s low moisture vapor transmission primary sealant (PIB) protects more than 80% of all dual-seal insulated units in North America. |
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