Why is a primer or bonding agent needed before waterproofing?

Primers seal substrate pores, improve adhesion between surface and waterproofing membrane, and prevent moisture blistering. On absorbent substrates like old concrete or block work, priming is essential. Skipping the primer is a common cause of waterproofing system failures.

What is SBR bonding agent and where is it used?

SBR (Styrene Butadiene Rubber) bonding agent is a latex emulsion mixed into cement slurries and repair mortars to improve adhesion, flexibility, and water resistance. It is used when applying plaster, repair mortar, or screed over existing concrete, or as a substrate primer before cementitious waterproofing.

Can epoxy primer be used on damp concrete surfaces?

Standard epoxy primers require dry surfaces for proper curing. For damp or green concrete, moisture-tolerant epoxy primers are available. Always check the moisture tolerance specification of the primer before application on recently placed or wet concrete.

Primers & Bonding Agents | Construction

Achieve reliable adhesion on every substrate with primers and bonding agents purpose-made for concrete, masonry, steel, and cementitious overlays. This collection includes 17 products that form the critical first coat in any repair, waterproofing, or flooring system.

Choose from SBR latex bonding agents for old-to-new concrete joints, epoxy primers for damp or oily substrates, penetrating sealers that consolidate weak laitance layers, and acrylic primers for cementitious waterproofing systems. Every primer is matched to a downstream coating or repair product for system-level compatibility.

Best sellers include Sika Bonding Agent, Fosroc Nitobond SBR, and MC-Bauchemie primers — contractor-approved across India.

Primers are the foundation of every system: pair with waterproofing membranes, concrete repair mortars, or epoxy floor coatings for a complete specification.