We have a project that uses a waterstop in an elevator pit. The waterproofing is on the exterior side of the concrete. The waterstop is nestled between two slabs of concrete and there are no plans to seal the concrete seam on the interior. The waterstop material has zero VOCs, but the primer submitted has 509 g/L. Two questions:
1. With the waterstop embedded in the cold joint of the concrete, is it considered to be inside of the weatherproofing system or encapsulated within the concrete itself?
2. If so, does the primer used need to meet the VOC requirement for "Special Purpose Contact Adhesive" at 250 g/L?
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