William S. Simpson Co., Inc.
107 Eastman Street
South Easton, MA 02375
United States
ph: (508) 230-0900
fax: (508) 230-7069
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William S. Simpson through it's many affiliations has been a leader in distribution of chemical and mechanical water resistant and waterproofing systems. As technology changes WSS tries to maintain and advance in our product lines and systems available.


A damp-proof barrier for block and concrete foundations, or as a wood saturant.

One of the most difficult decisions you can be faced with is trying to compare products as “true” alternatives to each other. Thankfully, testing procedures allow you the ability to compare physical properties side by side. W. R. MEADOWS, the originator of below-slab vapor protection, is concerned that confusing information is being provided to you, the specifier. If you design it, you own it, so you need to trust the companies you’re dealing with. |
THERMADRAIN SYSTEM...

Diedrich OMEGASEAL 333 series of water repellents provides hydrophobic protection to masonry surfaces through the formation of a semipermeable membrane. This flexible membrane remains intact through thermal movement of the masonry, rejects water in the solid state and allows for moisture vapor transmission, it breaths. The unique blend of inorganic silicone polymers provides maximum resistance to destruction from ultraviolet light and acid rain. OMEGASEAL 333 series products can be applied to clay brick, concrete brick, precast & site-cast vertical and horizontal concrete, interlocking pavers, most natural stone, concrete block, hollow core split faced block, fluted block, light weight block and wood. Square footage approximately 50-100 sq. ft. per gallon each application.
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It's our most precious natural resource. It's also the most damaging. When water finds its way into a masonry wall cavity, it wreaks havoc - causing rot, decay, mold, and cracking.
That's why you need to utilize quality flashings, drainage devices, and masonry accessories.
Air & Water-Resistive Barriers
A fluid applied air and water-resistive barrier that stops air and water leakage through cavity wall, masonry veneer construction
Copyright 2009 William S. Simpson Co., Inc.. All rights reserved.
SITE MAINTAINED BY KNIGHTSVILLE SALES
1895 UNIT#2 COUNTY STREET
ATTLEBORO, MA. 02703
knightsvillesales@gmail.com or click here for more info.
William S. Simpson Co., Inc.
107 Eastman Street
South Easton, MA 02375
United States
ph: (508) 230-0900
fax: (508) 230-7069
jim