Selecting a Joint Sealant St. John's NL

The sealants used to provide weather protection in masonry expansion and control joints form the final link in the cladding envelope. Successful movement joints that are watertight and durable require proper joint design and construction in St. John's; adequate joint sizing; appropriate product selection; and careful sealant installation in St. John's.

Kent Home Improvement Warehouse
(709) 758-2500
10 Stavanger Drive
St. John's, NL
 
Bilt Right Services Corp
(709) 726-0003
50 Pippy Place
St. John's, NL
 
Atlantic Trusses
(709) 747-2771
20 Corey King Dr
St. John's, NL
 
Kento Ltd
(709) 834-8133
405 Fowlers Road
St. John's, NL
 
Powers Surplus & Salvage
(709) 722-1720
11 Ropewalk Lane
St. John's, NL
 
Trim Shoppe
(709) 739-0030
445 Torbay Road
St. John's, NL
 
Powers Surplus & Salvage
(709) 722-1720
11 Ropewalk Lane
St. John's, NL
 
Smith's Home Hardware
(709) 364-7525
650 Topsail Road
St. John's, NL
 
Hickey's Building Supplies
(709) 722-0837
Harbour Main
St. John's, NL
 
Bilt Right Services Corp
(709) 726-0003
50 Pippy Place
St. John's, NL
 

Selecting a Joint Sealant

Provided By:

Source: MASONRY CONSTRUCTION MAGAZINE
Publication date: December 1, 1996

By Christine Beall

The sealants used to provide weather protection in masonry expansion and control joints form the final link in the cladding envelope. Successful movement joints that are watertight and durable require proper joint design and construction; adequate joint sizing; appropriate product selection; and careful sealant installation.

The choice of sealant material should be based on performance, aesthetics, and durability. Only high-performance elastomeric sealants, such as polysulfides, urethanes, and silicones, should be used in masonry control and expansion joints. These sealants are covered by ASTM C 920 Standard Specification for Elastomeric Joint Sealants.

The movement capability of sealants is closely related to modulus of elasticity, defined as the ratio of the force (stress) needed to elongate (strain) a sealant to a certain point. Many sealants are available in single-component and multi-component formulations. Single-component sealants are supplied ready for application and require no mixing. Multi-component sealants are mixed at the jobsite just before application.

To maintain movement capability over an extended service life, sealants must have good elasticity in cyclic movements. Elasticity is a measure of the sealant's ability to recover its original shape after elongation or compression.

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