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Is Liquid Rubber compatible with Grace Ultra underlayment?

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The manufacture claims that Grace Ultra is Compatible with EPDMs and TPO low slope membranes. GRACE ULTRA™ butyl roofing underlayment is composed of two waterproofing materials—an aggressive 100% butyl rubber adhesive backed by a layer of high density cross laminated polyethylene film.

Can Liquid Rubber be applied directly on top of Grace Ulta?
asked Oct 18, 2018 in Liquid Rubber by Joe S

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I would highly suggest applying the proflex primer over the butyl substrate first

Thank  you
answered Oct 18, 2018 by admin